./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.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 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:37:35,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:37:35,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:37:35,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:37:35,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:37:35,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:37:35,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:37:35,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:37:35,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:37:35,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:37:35,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:37:35,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:37:35,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:37:35,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:37:35,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:37:35,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:37:35,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:37:35,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:37:35,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:37:35,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:37:35,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:37:35,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:37:35,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:37:35,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:37:35,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:37:35,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:37:35,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:37:35,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:37:35,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:37:35,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:37:35,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:37:35,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:37:35,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:37:35,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:37:35,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:37:35,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:37:35,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:37:35,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:37:35,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:37:35,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:37:35,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:37:35,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:37:35,324 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:37:35,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:37:35,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:37:35,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:37:35,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:37:35,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:37:35,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:37:35,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:37:35,328 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:37:35,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:37:35,329 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:37:35,329 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:37:35,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:37:35,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:37:35,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:37:35,330 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:37:35,330 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:37:35,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:37:35,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:37:35,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:37:35,331 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:37:35,331 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:37:35,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:37:35,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:37:35,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:37:35,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:37:35,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:37:35,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:37:35,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:37:35,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:37:35,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:37:35,333 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:37:35,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:37:35,333 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:37:35,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:37:35,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:37:35,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:37:35,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:37:35,605 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:37:35,605 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:37:35,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-29 23:37:36,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:37:36,978 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:37:36,979 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-29 23:37:36,984 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c608c3aa/c956d009cf2f4638aedac3c760d8f2f9/FLAG5df94f149 [2023-08-29 23:37:36,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c608c3aa/c956d009cf2f4638aedac3c760d8f2f9 [2023-08-29 23:37:36,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:37:37,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:37:37,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:37:37,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:37:37,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:37:37,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:36" (1/1) ... [2023-08-29 23:37:37,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b921b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:37, skipping insertion in model container [2023-08-29 23:37:37,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:36" (1/1) ... [2023-08-29 23:37:37,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:37:37,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:37:37,164 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-29 23:37:37,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:37:37,182 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:37:37,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42c2677d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:37, skipping insertion in model container [2023-08-29 23:37:37,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:37:37,183 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:37:37,185 INFO L158 Benchmark]: Toolchain (without parser) took 184.50ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 49.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:37:37,186 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:37:37,186 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.63ms. Allocated memory is still 81.8MB. Free memory was 59.7MB in the beginning and 49.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:37:37,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.63ms. Allocated memory is still 81.8MB. Free memory was 59.7MB in the beginning and 49.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 183]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.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 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:37:38,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:37:38,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:37:38,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:37:38,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:37:38,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:37:38,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:37:38,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:37:38,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:37:38,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:37:38,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:37:38,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:37:38,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:37:38,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:37:38,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:37:38,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:37:38,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:37:38,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:37:38,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:37:38,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:37:38,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:37:38,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:37:38,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:37:38,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:37:38,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:37:38,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:37:38,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:37:38,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:37:38,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:37:38,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:37:38,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:37:38,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:37:38,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:37:38,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:37:38,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:37:38,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:37:38,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:37:38,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:37:38,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:37:38,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:37:38,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:37:38,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:37:39,019 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:37:39,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:37:39,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:37:39,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:37:39,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:37:39,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:37:39,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:37:39,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:37:39,023 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:37:39,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:37:39,023 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:37:39,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:37:39,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:37:39,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:37:39,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:37:39,024 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:37:39,025 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:37:39,026 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:37:39,026 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:37:39,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:37:39,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:37:39,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:37:39,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:37:39,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:37:39,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:37:39,027 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:37:39,027 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:37:39,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:37:39,028 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:37:39,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:37:39,028 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:37:39,028 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:37:39,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8fef41c3119c5f4fc9586ebd31a4ff7152be41d9f2f8da139e8cd34cf0da86 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:37:39,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:37:39,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:37:39,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:37:39,366 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:37:39,366 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:37:39,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-29 23:37:40,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:37:40,644 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:37:40,645 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c [2023-08-29 23:37:40,651 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65025b391/04399cfaaf9743eca2401cb981490176/FLAGf91f96218 [2023-08-29 23:37:40,663 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65025b391/04399cfaaf9743eca2401cb981490176 [2023-08-29 23:37:40,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:37:40,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:37:40,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:37:40,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:37:40,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:37:40,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:40,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f3408f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40, skipping insertion in model container [2023-08-29 23:37:40,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:40,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:37:40,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:37:40,852 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-29 23:37:40,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:37:40,873 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:37:40,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:37:40,893 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-29 23:37:40,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:37:40,906 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:37:40,932 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1-dsl.wvr.c[4372,4385] [2023-08-29 23:37:40,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:37:40,945 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:37:40,946 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:37:40,951 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:37:40,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40 WrapperNode [2023-08-29 23:37:40,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:37:40,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:37:40,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:37:40,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:37:40,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:40,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,016 INFO L138 Inliner]: procedures = 31, calls = 95, calls flagged for inlining = 21, calls inlined = 27, statements flattened = 289 [2023-08-29 23:37:41,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:37:41,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:37:41,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:37:41,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:37:41,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,082 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:37:41,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:37:41,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:37:41,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:37:41,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (1/1) ... [2023-08-29 23:37:41,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:37:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:37:41,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:37:41,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:37:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:37:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:37:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:37:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:37:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:37:41,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:37:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:37:41,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:37:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:37:41,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:37:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:37:41,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:37:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-29 23:37:41,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-29 23:37:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-29 23:37:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-29 23:37:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:37:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:37:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:37:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:37:41,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:37:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:37:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:37:41,155 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:37:41,320 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:37:41,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:37:41,882 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:37:42,026 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:37:42,027 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-29 23:37:42,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:37:42 BoogieIcfgContainer [2023-08-29 23:37:42,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:37:42,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:37:42,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:37:42,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:37:42,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:37:40" (1/3) ... [2023-08-29 23:37:42,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d3fad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:37:42, skipping insertion in model container [2023-08-29 23:37:42,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:40" (2/3) ... [2023-08-29 23:37:42,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d3fad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:37:42, skipping insertion in model container [2023-08-29 23:37:42,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:37:42" (3/3) ... [2023-08-29 23:37:42,037 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1-dsl.wvr.c [2023-08-29 23:37:42,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:37:42,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-29 23:37:42,051 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:37:42,184 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-29 23:37:42,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 294 transitions, 660 flow [2023-08-29 23:37:42,361 INFO L130 PetriNetUnfolder]: 18/262 cut-off events. [2023-08-29 23:37:42,362 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:37:42,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 262 events. 18/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 492 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-29 23:37:42,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 294 transitions, 660 flow [2023-08-29 23:37:42,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 258 transitions, 564 flow [2023-08-29 23:37:42,389 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:37:42,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 258 transitions, 564 flow [2023-08-29 23:37:42,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 258 transitions, 564 flow [2023-08-29 23:37:42,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 258 transitions, 564 flow [2023-08-29 23:37:42,454 INFO L130 PetriNetUnfolder]: 18/258 cut-off events. [2023-08-29 23:37:42,455 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:37:42,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 18/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 490 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-29 23:37:42,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 12760 [2023-08-29 23:37:54,153 INFO L134 LiptonReduction]: Checked pairs total: 60475 [2023-08-29 23:37:54,154 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-08-29 23:37:54,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:37:54,171 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;@7762e3b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:37:54,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-08-29 23:37:54,174 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:37:54,175 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:37:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:37:54,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:37:54,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:37:54,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:37:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 43267, now seen corresponding path program 1 times [2023-08-29 23:37:54,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:37:54,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540003419] [2023-08-29 23:37:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:37:54,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:37:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:37:54,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:37:54,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:37:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:37:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:37:54,514 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:37:54,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:37:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:54,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:37:54,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:37:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540003419] [2023-08-29 23:37:54,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540003419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:37:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:37:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:37:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361744765] [2023-08-29 23:37:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:37:54,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:37:54,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:37:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:37:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:37:54,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-29 23:37:54,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 100 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:54,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:54,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-29 23:37:54,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:21,692 INFO L130 PetriNetUnfolder]: 290858/362019 cut-off events. [2023-08-29 23:38:21,693 INFO L131 PetriNetUnfolder]: For 18009/18009 co-relation queries the response was YES. [2023-08-29 23:38:22,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734759 conditions, 362019 events. 290858/362019 cut-off events. For 18009/18009 co-relation queries the response was YES. Maximal size of possible extension queue 16502. Compared 2026823 event pairs, 236783 based on Foata normal form. 0/145706 useless extension candidates. Maximal degree in co-relation 731026. Up to 339059 conditions per place. [2023-08-29 23:38:23,841 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 110 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2023-08-29 23:38:23,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 607 flow [2023-08-29 23:38:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-08-29 23:38:23,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212002609262884 [2023-08-29 23:38:23,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-08-29 23:38:23,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-08-29 23:38:23,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:23,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-08-29 23:38:23,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:23,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:23,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:23,874 INFO L175 Difference]: Start difference. First operand has 110 places, 100 transitions, 248 flow. Second operand 3 states and 799 transitions. [2023-08-29 23:38:23,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 607 flow [2023-08-29 23:38:32,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 549 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 23:38:32,254 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 229 flow [2023-08-29 23:38:32,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2023-08-29 23:38:32,258 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2023-08-29 23:38:32,259 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 229 flow [2023-08-29 23:38:32,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:32,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:32,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:32,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:32,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:38:32,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:38:32,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash 43311, now seen corresponding path program 1 times [2023-08-29 23:38:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521777543] [2023-08-29 23:38:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:32,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:38:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:32,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:38:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:38:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:38:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:32,593 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:38:32,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-29 23:38:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:32,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:32,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521777543] [2023-08-29 23:38:32,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521777543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:32,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:32,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005425988] [2023-08-29 23:38:32,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:32,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-29 23:38:32,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:32,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:32,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-29 23:38:32,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:49,546 INFO L130 PetriNetUnfolder]: 216518/270567 cut-off events. [2023-08-29 23:38:49,546 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2023-08-29 23:38:49,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537433 conditions, 270567 events. 216518/270567 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 12445. Compared 1489049 event pairs, 174483 based on Foata normal form. 0/113967 useless extension candidates. Maximal degree in co-relation 516084. Up to 251030 conditions per place. [2023-08-29 23:38:50,978 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 108 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-29 23:38:50,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 554 flow [2023-08-29 23:38:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-29 23:38:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198956294846706 [2023-08-29 23:38:50,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-29 23:38:50,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-29 23:38:50,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:50,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-29 23:38:50,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:50,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:50,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:50,989 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 229 flow. Second operand 3 states and 797 transitions. [2023-08-29 23:38:50,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 554 flow [2023-08-29 23:38:51,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:51,031 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 235 flow [2023-08-29 23:38:51,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2023-08-29 23:38:51,032 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-08-29 23:38:51,033 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 235 flow [2023-08-29 23:38:51,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:51,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:51,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:51,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:38:51,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:38:51,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash 43268, now seen corresponding path program 1 times [2023-08-29 23:38:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602471235] [2023-08-29 23:38:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:51,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:38:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:51,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:38:51,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:38:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:38:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:51,397 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:38:51,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:38:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:51,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:51,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602471235] [2023-08-29 23:38:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602471235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:51,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:51,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:51,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543780561] [2023-08-29 23:38:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:51,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:51,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:51,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-08-29 23:38:51,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:51,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:51,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-08-29 23:38:51,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:08,866 INFO L130 PetriNetUnfolder]: 220117/275725 cut-off events. [2023-08-29 23:39:08,866 INFO L131 PetriNetUnfolder]: For 4858/4858 co-relation queries the response was YES. [2023-08-29 23:39:09,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548577 conditions, 275725 events. 220117/275725 cut-off events. For 4858/4858 co-relation queries the response was YES. Maximal size of possible extension queue 12445. Compared 1519142 event pairs, 153763 based on Foata normal form. 0/117349 useless extension candidates. Maximal degree in co-relation 525802. Up to 265620 conditions per place. [2023-08-29 23:39:10,162 INFO L137 encePairwiseOnDemand]: 506/511 looper letters, 74 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-08-29 23:39:10,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 109 transitions, 413 flow [2023-08-29 23:39:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:39:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:39:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-29 23:39:10,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042400521852577 [2023-08-29 23:39:10,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-29 23:39:10,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-29 23:39:10,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:10,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-29 23:39:10,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:10,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:10,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:10,172 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 235 flow. Second operand 3 states and 773 transitions. [2023-08-29 23:39:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 109 transitions, 413 flow [2023-08-29 23:39:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:39:10,188 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 255 flow [2023-08-29 23:39:10,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2023-08-29 23:39:10,189 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -9 predicate places. [2023-08-29 23:39:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 255 flow [2023-08-29 23:39:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:10,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:39:10,199 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 (4)] Ended with exit code 0 [2023-08-29 23:39:10,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:10,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:39:10,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 43312, now seen corresponding path program 1 times [2023-08-29 23:39:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675042975] [2023-08-29 23:39:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:10,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:10,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:39:10,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:39:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:39:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:10,516 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:39:10,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:39:10,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 23:39:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:10,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:10,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675042975] [2023-08-29 23:39:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675042975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:39:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465816616] [2023-08-29 23:39:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:39:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:39:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:39:10,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-08-29 23:39:10,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:10,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:10,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-08-29 23:39:10,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:22,233 INFO L130 PetriNetUnfolder]: 141195/178036 cut-off events. [2023-08-29 23:39:22,234 INFO L131 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2023-08-29 23:39:22,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354018 conditions, 178036 events. 141195/178036 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 8390. Compared 961465 event pairs, 117077 based on Foata normal form. 0/82402 useless extension candidates. Maximal degree in co-relation 352352. Up to 171439 conditions per place. [2023-08-29 23:39:23,082 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 63 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-08-29 23:39:23,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 379 flow [2023-08-29 23:39:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:39:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:39:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-08-29 23:39:23,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50293542074364 [2023-08-29 23:39:23,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-08-29 23:39:23,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-08-29 23:39:23,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:23,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-08-29 23:39:23,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:23,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:23,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:23,091 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 255 flow. Second operand 3 states and 771 transitions. [2023-08-29 23:39:23,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 379 flow [2023-08-29 23:39:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:23,100 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 249 flow [2023-08-29 23:39:23,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2023-08-29 23:39:23,101 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-08-29 23:39:23,102 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 249 flow [2023-08-29 23:39:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:23,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:23,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:39:23,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:39:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:23,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:39:23,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1343966, now seen corresponding path program 1 times [2023-08-29 23:39:23,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:23,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793239412] [2023-08-29 23:39:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:23,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:23,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:23,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:39:23,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:39:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:23,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:39:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:23,441 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:39:23,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:39:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:39:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:23,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793239412] [2023-08-29 23:39:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793239412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:39:23,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:39:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:39:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830303364] [2023-08-29 23:39:23,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:39:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:39:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:39:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:39:24,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 511 [2023-08-29 23:39:24,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:24,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:24,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 511 [2023-08-29 23:39:24,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:36,298 INFO L130 PetriNetUnfolder]: 142979/180488 cut-off events. [2023-08-29 23:39:36,299 INFO L131 PetriNetUnfolder]: For 2911/2911 co-relation queries the response was YES. [2023-08-29 23:39:36,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359315 conditions, 180488 events. 142979/180488 cut-off events. For 2911/2911 co-relation queries the response was YES. Maximal size of possible extension queue 8390. Compared 973345 event pairs, 117797 based on Foata normal form. 0/84042 useless extension candidates. Maximal degree in co-relation 359304. Up to 173708 conditions per place. [2023-08-29 23:39:37,374 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 81 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2023-08-29 23:39:37,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 527 flow [2023-08-29 23:39:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:39:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:39:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-08-29 23:39:37,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765166340508806 [2023-08-29 23:39:37,378 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-08-29 23:39:37,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-08-29 23:39:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:37,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-08-29 23:39:37,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.5) internal successors, (1461), 6 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:37,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:37,388 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 511.0) internal successors, (3577), 7 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:37,389 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 249 flow. Second operand 6 states and 1461 transitions. [2023-08-29 23:39:37,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 527 flow [2023-08-29 23:39:37,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:37,395 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 376 flow [2023-08-29 23:39:37,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=108, PETRI_TRANSITIONS=113} [2023-08-29 23:39:37,396 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -2 predicate places. [2023-08-29 23:39:37,397 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 376 flow [2023-08-29 23:39:37,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:37,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:37,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:39:37,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:39:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:37,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:39:37,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510548, now seen corresponding path program 1 times [2023-08-29 23:39:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941811567] [2023-08-29 23:39:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:37,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:39:37,610 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 (7)] Waiting until timeout for monitored process [2023-08-29 23:39:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:37,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:39:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:37,713 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-29 23:39:37,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-29 23:39:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:37,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:37,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941811567] [2023-08-29 23:39:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941811567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:39:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968625458] [2023-08-29 23:39:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:39:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:39:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:39:37,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 511 [2023-08-29 23:39:37,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 113 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:37,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:37,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 511 [2023-08-29 23:39:37,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:50,291 INFO L130 PetriNetUnfolder]: 144792/183219 cut-off events. [2023-08-29 23:39:50,291 INFO L131 PetriNetUnfolder]: For 2993/2999 co-relation queries the response was YES. [2023-08-29 23:39:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364760 conditions, 183219 events. 144792/183219 cut-off events. For 2993/2999 co-relation queries the response was YES. Maximal size of possible extension queue 8397. Compared 993984 event pairs, 115184 based on Foata normal form. 1/85289 useless extension candidates. Maximal degree in co-relation 364744. Up to 168721 conditions per place. [2023-08-29 23:39:51,293 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 119 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2023-08-29 23:39:51,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 168 transitions, 761 flow [2023-08-29 23:39:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:39:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:39:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-08-29 23:39:51,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192433137638617 [2023-08-29 23:39:51,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-08-29 23:39:51,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-08-29 23:39:51,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:51,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-08-29 23:39:51,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:51,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:51,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:51,299 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 376 flow. Second operand 3 states and 796 transitions. [2023-08-29 23:39:51,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 168 transitions, 761 flow [2023-08-29 23:39:51,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 739 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:51,308 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 412 flow [2023-08-29 23:39:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2023-08-29 23:39:51,309 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 1 predicate places. [2023-08-29 23:39:51,310 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 412 flow [2023-08-29 23:39:51,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:51,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:51,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:39:51,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:39:51,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:39:51,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:39:51,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1376510549, now seen corresponding path program 1 times [2023-08-29 23:39:51,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:51,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994930559] [2023-08-29 23:39:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:51,530 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 [2023-08-29 23:39:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:51,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:39:51,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:39:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:39:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:51,677 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:39:51,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:39:51,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:39:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:51,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:51,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:51,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994930559] [2023-08-29 23:39:51,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994930559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:51,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:51,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:39:51,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440042909] [2023-08-29 23:39:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:51,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:39:51,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:39:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:39:51,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 511 [2023-08-29 23:39:51,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:51,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:51,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 511 [2023-08-29 23:39:51,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:04,256 INFO L130 PetriNetUnfolder]: 143847/181912 cut-off events. [2023-08-29 23:40:04,256 INFO L131 PetriNetUnfolder]: For 7134/7142 co-relation queries the response was YES. [2023-08-29 23:40:04,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365034 conditions, 181912 events. 143847/181912 cut-off events. For 7134/7142 co-relation queries the response was YES. Maximal size of possible extension queue 8395. Compared 987168 event pairs, 118846 based on Foata normal form. 361/85253 useless extension candidates. Maximal degree in co-relation 365015. Up to 175045 conditions per place. [2023-08-29 23:40:05,341 INFO L137 encePairwiseOnDemand]: 508/511 looper letters, 72 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-08-29 23:40:05,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 116 transitions, 554 flow [2023-08-29 23:40:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-29 23:40:05,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2023-08-29 23:40:05,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-29 23:40:05,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-29 23:40:05,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:05,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-29 23:40:05,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:05,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:05,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:05,348 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 412 flow. Second operand 3 states and 770 transitions. [2023-08-29 23:40:05,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 116 transitions, 554 flow [2023-08-29 23:40:05,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 116 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:05,369 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 394 flow [2023-08-29 23:40:05,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2023-08-29 23:40:05,370 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2023-08-29 23:40:05,370 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 394 flow [2023-08-29 23:40:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:05,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:05,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:40:05,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 23:40:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:05,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:05,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1386024836, now seen corresponding path program 2 times [2023-08-29 23:40:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881410670] [2023-08-29 23:40:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:40:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:05,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:40:05,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:40:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:40:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:40:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:05,712 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:05,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:05,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:06,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:06,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881410670] [2023-08-29 23:40:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881410670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:06,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:40:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332916469] [2023-08-29 23:40:06,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:40:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:06,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:40:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:40:10,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-29 23:40:10,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 394 flow. Second operand has 12 states, 12 states have (on average 229.0) internal successors, (2748), 12 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:10,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:10,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-29 23:40:10,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:25,008 INFO L130 PetriNetUnfolder]: 145156/183628 cut-off events. [2023-08-29 23:40:25,008 INFO L131 PetriNetUnfolder]: For 6704/6708 co-relation queries the response was YES. [2023-08-29 23:40:25,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368828 conditions, 183628 events. 145156/183628 cut-off events. For 6704/6708 co-relation queries the response was YES. Maximal size of possible extension queue 8398. Compared 994155 event pairs, 104516 based on Foata normal form. 6/86088 useless extension candidates. Maximal degree in co-relation 368809. Up to 176604 conditions per place. [2023-08-29 23:40:26,047 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 116 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2023-08-29 23:40:26,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 963 flow [2023-08-29 23:40:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:40:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:40:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2886 transitions. [2023-08-29 23:40:26,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706457925636008 [2023-08-29 23:40:26,054 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2886 transitions. [2023-08-29 23:40:26,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2886 transitions. [2023-08-29 23:40:26,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:26,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2886 transitions. [2023-08-29 23:40:26,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 240.5) internal successors, (2886), 12 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,068 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 511.0) internal successors, (6643), 13 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,068 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 394 flow. Second operand 12 states and 2886 transitions. [2023-08-29 23:40:26,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 963 flow [2023-08-29 23:40:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:26,077 INFO L231 Difference]: Finished difference. Result has 126 places, 137 transitions, 663 flow [2023-08-29 23:40:26,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=663, PETRI_PLACES=126, PETRI_TRANSITIONS=137} [2023-08-29 23:40:26,078 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 16 predicate places. [2023-08-29 23:40:26,078 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 137 transitions, 663 flow [2023-08-29 23:40:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 229.0) internal successors, (2748), 12 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:26,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:26,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:26,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -266273782, now seen corresponding path program 1 times [2023-08-29 23:40:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738629122] [2023-08-29 23:40:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:26,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:40:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:40:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:26,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:40:26,409 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:40:26,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:40:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:26,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:26,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738629122] [2023-08-29 23:40:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738629122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:26,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:26,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:40:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380044255] [2023-08-29 23:40:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:26,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 511 [2023-08-29 23:40:26,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 137 transitions, 663 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:26,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 511 [2023-08-29 23:40:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:37,601 INFO L130 PetriNetUnfolder]: 115791/150843 cut-off events. [2023-08-29 23:40:37,601 INFO L131 PetriNetUnfolder]: For 6647/6651 co-relation queries the response was YES. [2023-08-29 23:40:38,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300639 conditions, 150843 events. 115791/150843 cut-off events. For 6647/6651 co-relation queries the response was YES. Maximal size of possible extension queue 6338. Compared 866172 event pairs, 81266 based on Foata normal form. 0/74741 useless extension candidates. Maximal degree in co-relation 300612. Up to 130436 conditions per place. [2023-08-29 23:40:38,663 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 125 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2023-08-29 23:40:38,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 1073 flow [2023-08-29 23:40:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-08-29 23:40:38,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166340508806262 [2023-08-29 23:40:38,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-08-29 23:40:38,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-08-29 23:40:38,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:38,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-08-29 23:40:38,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:38,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:38,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:38,671 INFO L175 Difference]: Start difference. First operand has 126 places, 137 transitions, 663 flow. Second operand 3 states and 792 transitions. [2023-08-29 23:40:38,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 1073 flow [2023-08-29 23:40:38,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1053 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:38,686 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 748 flow [2023-08-29 23:40:38,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=748, PETRI_PLACES=128, PETRI_TRANSITIONS=142} [2023-08-29 23:40:38,688 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2023-08-29 23:40:38,688 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 748 flow [2023-08-29 23:40:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:38,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:38,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:38,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:38,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:38,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash -266273781, now seen corresponding path program 1 times [2023-08-29 23:40:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:38,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818595985] [2023-08-29 23:40:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:38,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:38,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:38,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:40:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:38,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:40:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:38,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:40:38,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:40:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:40:39,021 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:40:39,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:40:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:39,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:39,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:39,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818595985] [2023-08-29 23:40:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818595985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:39,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330941432] [2023-08-29 23:40:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:40:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:40:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:40:39,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 511 [2023-08-29 23:40:39,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:39,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:39,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 511 [2023-08-29 23:40:39,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:47,895 INFO L130 PetriNetUnfolder]: 84357/111274 cut-off events. [2023-08-29 23:40:47,896 INFO L131 PetriNetUnfolder]: For 18045/18048 co-relation queries the response was YES. [2023-08-29 23:40:48,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231656 conditions, 111274 events. 84357/111274 cut-off events. For 18045/18048 co-relation queries the response was YES. Maximal size of possible extension queue 4255. Compared 635591 event pairs, 65355 based on Foata normal form. 6528/65730 useless extension candidates. Maximal degree in co-relation 231628. Up to 93571 conditions per place. [2023-08-29 23:40:48,751 INFO L137 encePairwiseOnDemand]: 502/511 looper letters, 149 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2023-08-29 23:40:48,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 1264 flow [2023-08-29 23:40:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:40:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:40:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-08-29 23:40:48,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053816046966731 [2023-08-29 23:40:48,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-08-29 23:40:48,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-08-29 23:40:48,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:48,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-08-29 23:40:48,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:48,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:48,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:48,758 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 748 flow. Second operand 4 states and 1033 transitions. [2023-08-29 23:40:48,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 1264 flow [2023-08-29 23:40:48,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 211 transitions, 1228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:48,792 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 748 flow [2023-08-29 23:40:48,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2023-08-29 23:40:48,793 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 17 predicate places. [2023-08-29 23:40:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 748 flow [2023-08-29 23:40:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:48,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:48,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:48,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:49,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:49,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1808967282, now seen corresponding path program 1 times [2023-08-29 23:40:49,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:49,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756893561] [2023-08-29 23:40:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:49,003 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 [2023-08-29 23:40:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:49,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:49,005 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 (12)] Waiting until timeout for monitored process [2023-08-29 23:40:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:49,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:49,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756893561] [2023-08-29 23:40:49,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756893561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:49,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:49,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:40:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27593686] [2023-08-29 23:40:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:49,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:40:49,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:40:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:40:49,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 511 [2023-08-29 23:40:49,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:49,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:49,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 511 [2023-08-29 23:40:49,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:00,337 INFO L130 PetriNetUnfolder]: 105201/140365 cut-off events. [2023-08-29 23:41:00,337 INFO L131 PetriNetUnfolder]: For 22638/22650 co-relation queries the response was YES. [2023-08-29 23:41:00,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293608 conditions, 140365 events. 105201/140365 cut-off events. For 22638/22650 co-relation queries the response was YES. Maximal size of possible extension queue 4820. Compared 851065 event pairs, 72333 based on Foata normal form. 1/76731 useless extension candidates. Maximal degree in co-relation 293580. Up to 102412 conditions per place. [2023-08-29 23:41:01,330 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 165 selfloop transitions, 4 changer transitions 0/226 dead transitions. [2023-08-29 23:41:01,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 226 transitions, 1389 flow [2023-08-29 23:41:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:41:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:41:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1311 transitions. [2023-08-29 23:41:01,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131115459882584 [2023-08-29 23:41:01,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1311 transitions. [2023-08-29 23:41:01,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1311 transitions. [2023-08-29 23:41:01,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:01,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1311 transitions. [2023-08-29 23:41:01,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 262.2) internal successors, (1311), 5 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,339 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 748 flow. Second operand 5 states and 1311 transitions. [2023-08-29 23:41:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 226 transitions, 1389 flow [2023-08-29 23:41:01,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 226 transitions, 1348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:01,455 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 754 flow [2023-08-29 23:41:01,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=754, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2023-08-29 23:41:01,455 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 22 predicate places. [2023-08-29 23:41:01,456 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 754 flow [2023-08-29 23:41:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:01,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:01,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:01,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1462434484, now seen corresponding path program 1 times [2023-08-29 23:41:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057919976] [2023-08-29 23:41:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:01,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:01,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:01,667 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:01,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:41:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:41:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:01,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:02,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057919976] [2023-08-29 23:41:02,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057919976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:02,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:02,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:41:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566158308] [2023-08-29 23:41:02,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:02,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:41:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:41:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:41:02,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 511 [2023-08-29 23:41:02,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 754 flow. Second operand has 10 states, 10 states have (on average 233.4) internal successors, (2334), 10 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:02,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:02,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 511 [2023-08-29 23:41:02,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:17,792 INFO L130 PetriNetUnfolder]: 123460/172273 cut-off events. [2023-08-29 23:41:17,792 INFO L131 PetriNetUnfolder]: For 33299/33308 co-relation queries the response was YES. [2023-08-29 23:41:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369427 conditions, 172273 events. 123460/172273 cut-off events. For 33299/33308 co-relation queries the response was YES. Maximal size of possible extension queue 5597. Compared 1208487 event pairs, 50405 based on Foata normal form. 4037/107386 useless extension candidates. Maximal degree in co-relation 369395. Up to 58227 conditions per place. [2023-08-29 23:41:19,326 INFO L137 encePairwiseOnDemand]: 498/511 looper letters, 278 selfloop transitions, 14 changer transitions 0/349 dead transitions. [2023-08-29 23:41:19,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 349 transitions, 2032 flow [2023-08-29 23:41:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:41:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:41:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2810 transitions. [2023-08-29 23:41:19,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49991104785625334 [2023-08-29 23:41:19,331 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2810 transitions. [2023-08-29 23:41:19,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2810 transitions. [2023-08-29 23:41:19,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:19,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2810 transitions. [2023-08-29 23:41:19,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 255.45454545454547) internal successors, (2810), 11 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:19,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 511.0) internal successors, (6132), 12 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:19,339 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 511.0) internal successors, (6132), 12 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:19,339 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 754 flow. Second operand 11 states and 2810 transitions. [2023-08-29 23:41:19,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 349 transitions, 2032 flow [2023-08-29 23:41:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 349 transitions, 2024 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:19,401 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 831 flow [2023-08-29 23:41:19,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=831, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2023-08-29 23:41:19,402 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 35 predicate places. [2023-08-29 23:41:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 831 flow [2023-08-29 23:41:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.4) internal successors, (2334), 10 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:19,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:19,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:19,604 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:19,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 803337788, now seen corresponding path program 1 times [2023-08-29 23:41:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890346889] [2023-08-29 23:41:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:19,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:19,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:19,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:41:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:19,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:41:19,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:19,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:41:19,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:41:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:19,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:41:19,746 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:41:19,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:41:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:19,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:19,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890346889] [2023-08-29 23:41:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890346889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:41:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381661496] [2023-08-29 23:41:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:41:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:41:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:41:20,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 511 [2023-08-29 23:41:20,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 831 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:20,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:20,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 511 [2023-08-29 23:41:20,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:29,282 INFO L130 PetriNetUnfolder]: 76065/110524 cut-off events. [2023-08-29 23:41:29,282 INFO L131 PetriNetUnfolder]: For 53393/53397 co-relation queries the response was YES. [2023-08-29 23:41:29,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266382 conditions, 110524 events. 76065/110524 cut-off events. For 53393/53397 co-relation queries the response was YES. Maximal size of possible extension queue 2818. Compared 785567 event pairs, 21032 based on Foata normal form. 0/73849 useless extension candidates. Maximal degree in co-relation 266345. Up to 81899 conditions per place. [2023-08-29 23:41:30,440 INFO L137 encePairwiseOnDemand]: 501/511 looper letters, 139 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2023-08-29 23:41:30,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 204 transitions, 1392 flow [2023-08-29 23:41:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:41:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:41:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1012 transitions. [2023-08-29 23:41:30,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49510763209393344 [2023-08-29 23:41:30,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1012 transitions. [2023-08-29 23:41:30,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1012 transitions. [2023-08-29 23:41:30,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:30,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1012 transitions. [2023-08-29 23:41:30,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:30,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:30,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 511.0) internal successors, (2555), 5 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:30,446 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 831 flow. Second operand 4 states and 1012 transitions. [2023-08-29 23:41:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 204 transitions, 1392 flow [2023-08-29 23:41:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 204 transitions, 1363 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-29 23:41:30,496 INFO L231 Difference]: Finished difference. Result has 144 places, 151 transitions, 925 flow [2023-08-29 23:41:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=925, PETRI_PLACES=144, PETRI_TRANSITIONS=151} [2023-08-29 23:41:30,497 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 34 predicate places. [2023-08-29 23:41:30,497 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 151 transitions, 925 flow [2023-08-29 23:41:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:30,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:30,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:30,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:30,698 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:30,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 203325874, now seen corresponding path program 2 times [2023-08-29 23:41:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3147050] [2023-08-29 23:41:30,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:41:30,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:30,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:30,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:41:30,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:41:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:41:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:30,848 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:41:30,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:41:30,883 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:41:30,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2023-08-29 23:41:30,914 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:41:30,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-08-29 23:41:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:41:30,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:30,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:30,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3147050] [2023-08-29 23:41:30,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3147050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:30,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:30,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:41:30,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883967794] [2023-08-29 23:41:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:30,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:41:30,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:41:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:41:31,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 511 [2023-08-29 23:41:31,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 151 transitions, 925 flow. Second operand has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:31,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:31,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 511 [2023-08-29 23:41:31,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:41,603 INFO L130 PetriNetUnfolder]: 81238/116353 cut-off events. [2023-08-29 23:41:41,603 INFO L131 PetriNetUnfolder]: For 93220/93220 co-relation queries the response was YES. [2023-08-29 23:41:42,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296873 conditions, 116353 events. 81238/116353 cut-off events. For 93220/93220 co-relation queries the response was YES. Maximal size of possible extension queue 2709. Compared 793740 event pairs, 38168 based on Foata normal form. 0/87019 useless extension candidates. Maximal degree in co-relation 296836. Up to 56365 conditions per place. [2023-08-29 23:41:42,536 INFO L137 encePairwiseOnDemand]: 489/511 looper letters, 254 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2023-08-29 23:41:42,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 324 transitions, 2207 flow [2023-08-29 23:41:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:41:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:41:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1646 transitions. [2023-08-29 23:41:42,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016214705060104 [2023-08-29 23:41:42,540 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1646 transitions. [2023-08-29 23:41:42,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1646 transitions. [2023-08-29 23:41:42,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:42,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1646 transitions. [2023-08-29 23:41:42,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 235.14285714285714) internal successors, (1646), 7 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:42,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:42,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 511.0) internal successors, (4088), 8 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:42,545 INFO L175 Difference]: Start difference. First operand has 144 places, 151 transitions, 925 flow. Second operand 7 states and 1646 transitions. [2023-08-29 23:41:42,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 324 transitions, 2207 flow [2023-08-29 23:41:42,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 2166 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:42,601 INFO L231 Difference]: Finished difference. Result has 153 places, 188 transitions, 1335 flow [2023-08-29 23:41:42,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=153, PETRI_TRANSITIONS=188} [2023-08-29 23:41:42,601 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 43 predicate places. [2023-08-29 23:41:42,601 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 188 transitions, 1335 flow [2023-08-29 23:41:42,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:42,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:42,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:42,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:42,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:42,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash 203325875, now seen corresponding path program 1 times [2023-08-29 23:41:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:42,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068650963] [2023-08-29 23:41:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:42,805 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:42,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:41:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:42,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:41:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:43,023 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:41:43,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:41:43,081 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:41:43,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:41:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:43,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-08-29 23:41:43,334 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:41:43,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:41:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:43,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:41:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:43,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:55,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068650963] [2023-08-29 23:41:55,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068650963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:55,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:55,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 23:41:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549007502] [2023-08-29 23:41:55,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:41:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:41:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=193, Unknown=2, NotChecked=0, Total=240 [2023-08-29 23:41:57,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:00,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:03,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:05,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:08,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:10,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:13,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:16,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:19,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:22,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:24,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:26,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:28,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:31,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:33,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:35,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:39,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:42,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:45,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:47,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:50,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:53,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:54,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:56,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:42:59,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:01,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:04,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:06,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:08,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:11,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:15,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:17,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:20,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:23,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:26,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:43:29,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:32,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:34,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:43:37,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:39,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:42,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:45,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:48,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:51,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:53,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:56,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:58,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:01,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:04,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:06,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:08,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:11,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:14,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:14,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 511 [2023-08-29 23:44:14,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 188 transitions, 1335 flow. Second operand has 16 states, 16 states have (on average 158.375) internal successors, (2534), 16 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:14,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:44:14,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 511 [2023-08-29 23:44:14,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:44:17,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:25,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:28,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:30,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:32,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:35,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:37,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:40,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:42,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:45,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:47,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:49,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:44:52,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:54,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:57,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:59,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:11,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:14,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:17,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:24,222 WARN L222 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 51 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:45:28,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:31,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:32,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:45:36,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:38,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:40,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:47,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:58,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:40,727 INFO L130 PetriNetUnfolder]: 303151/411184 cut-off events. [2023-08-29 23:46:40,727 INFO L131 PetriNetUnfolder]: For 699183/699227 co-relation queries the response was YES. [2023-08-29 23:46:43,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215053 conditions, 411184 events. 303151/411184 cut-off events. For 699183/699227 co-relation queries the response was YES. Maximal size of possible extension queue 7470. Compared 2957916 event pairs, 119273 based on Foata normal form. 4164/347352 useless extension candidates. Maximal degree in co-relation 1215011. Up to 114693 conditions per place. [2023-08-29 23:46:44,779 INFO L137 encePairwiseOnDemand]: 491/511 looper letters, 951 selfloop transitions, 129 changer transitions 0/1090 dead transitions. [2023-08-29 23:46:44,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 1090 transitions, 8126 flow [2023-08-29 23:46:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:46:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:46:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4089 transitions. [2023-08-29 23:46:44,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810455689124965 [2023-08-29 23:46:44,787 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4089 transitions. [2023-08-29 23:46:44,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4089 transitions. [2023-08-29 23:46:44,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:44,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4089 transitions. [2023-08-29 23:46:44,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 194.71428571428572) internal successors, (4089), 21 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:44,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 511.0) internal successors, (11242), 22 states have internal predecessors, (11242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:44,804 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 511.0) internal successors, (11242), 22 states have internal predecessors, (11242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:44,804 INFO L175 Difference]: Start difference. First operand has 153 places, 188 transitions, 1335 flow. Second operand 21 states and 4089 transitions. [2023-08-29 23:46:44,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 1090 transitions, 8126 flow [2023-08-29 23:46:59,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 1090 transitions, 7992 flow, removed 47 selfloop flow, removed 2 redundant places. [2023-08-29 23:46:59,347 INFO L231 Difference]: Finished difference. Result has 177 places, 303 transitions, 2997 flow [2023-08-29 23:46:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2997, PETRI_PLACES=177, PETRI_TRANSITIONS=303} [2023-08-29 23:46:59,348 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 67 predicate places. [2023-08-29 23:46:59,348 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 303 transitions, 2997 flow [2023-08-29 23:46:59,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 158.375) internal successors, (2534), 16 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:59,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:59,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:46:59,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:59,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:46:59,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1044234259, now seen corresponding path program 1 times [2023-08-29 23:46:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:59,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911444997] [2023-08-29 23:46:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:59,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:59,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:59,552 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:59,554 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 (17)] Waiting until timeout for monitored process [2023-08-29 23:46:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:46:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:59,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:46:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:59,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:59,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911444997] [2023-08-29 23:46:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911444997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:46:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473004185] [2023-08-29 23:46:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:46:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:46:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:46:59,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 511 [2023-08-29 23:46:59,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 303 transitions, 2997 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:59,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:59,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 511 [2023-08-29 23:46:59,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:33,921 INFO L130 PetriNetUnfolder]: 203580/285957 cut-off events. [2023-08-29 23:47:33,921 INFO L131 PetriNetUnfolder]: For 808853/809914 co-relation queries the response was YES. [2023-08-29 23:47:36,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965594 conditions, 285957 events. 203580/285957 cut-off events. For 808853/809914 co-relation queries the response was YES. Maximal size of possible extension queue 6077. Compared 2140269 event pairs, 76417 based on Foata normal form. 17/247830 useless extension candidates. Maximal degree in co-relation 965546. Up to 148685 conditions per place. [2023-08-29 23:47:37,165 INFO L137 encePairwiseOnDemand]: 503/511 looper letters, 282 selfloop transitions, 45 changer transitions 0/383 dead transitions. [2023-08-29 23:47:37,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 383 transitions, 4351 flow [2023-08-29 23:47:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-29 23:47:37,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2023-08-29 23:47:37,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-29 23:47:37,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-29 23:47:37,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:37,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-29 23:47:37,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:37,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:37,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:37,170 INFO L175 Difference]: Start difference. First operand has 177 places, 303 transitions, 2997 flow. Second operand 3 states and 789 transitions. [2023-08-29 23:47:37,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 383 transitions, 4351 flow [2023-08-29 23:47:58,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 383 transitions, 4196 flow, removed 70 selfloop flow, removed 4 redundant places. [2023-08-29 23:47:58,207 INFO L231 Difference]: Finished difference. Result has 177 places, 320 transitions, 3312 flow [2023-08-29 23:47:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3312, PETRI_PLACES=177, PETRI_TRANSITIONS=320} [2023-08-29 23:47:58,208 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 67 predicate places. [2023-08-29 23:47:58,208 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 320 transitions, 3312 flow [2023-08-29 23:47:58,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:58,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:58,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:47:58,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:58,409 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:47:58,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1044234258, now seen corresponding path program 1 times [2023-08-29 23:47:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297982728] [2023-08-29 23:47:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:58,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:58,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:58,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:47:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:47:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:58,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:47:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:58,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:58,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297982728] [2023-08-29 23:47:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297982728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:58,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:58,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:58,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664953139] [2023-08-29 23:47:58,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:58,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:47:58,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:47:58,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:58,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 511 [2023-08-29 23:47:58,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 320 transitions, 3312 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:58,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:58,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 511 [2023-08-29 23:47:58,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:29,066 INFO L130 PetriNetUnfolder]: 181198/262908 cut-off events. [2023-08-29 23:48:29,066 INFO L131 PetriNetUnfolder]: For 882544/884017 co-relation queries the response was YES. [2023-08-29 23:48:30,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892345 conditions, 262908 events. 181198/262908 cut-off events. For 882544/884017 co-relation queries the response was YES. Maximal size of possible extension queue 6037. Compared 2057833 event pairs, 113740 based on Foata normal form. 5516/231909 useless extension candidates. Maximal degree in co-relation 892298. Up to 173949 conditions per place. [2023-08-29 23:48:32,089 INFO L137 encePairwiseOnDemand]: 507/511 looper letters, 280 selfloop transitions, 24 changer transitions 0/364 dead transitions. [2023-08-29 23:48:32,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 364 transitions, 4251 flow [2023-08-29 23:48:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:48:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:48:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-08-29 23:48:32,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2023-08-29 23:48:32,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-08-29 23:48:32,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-08-29 23:48:32,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:48:32,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-08-29 23:48:32,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:32,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:32,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:32,094 INFO L175 Difference]: Start difference. First operand has 177 places, 320 transitions, 3312 flow. Second operand 3 states and 798 transitions. [2023-08-29 23:48:32,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 364 transitions, 4251 flow [2023-08-29 23:48:48,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 364 transitions, 4133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:48:48,061 INFO L231 Difference]: Finished difference. Result has 174 places, 318 transitions, 3238 flow [2023-08-29 23:48:48,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3238, PETRI_PLACES=174, PETRI_TRANSITIONS=318} [2023-08-29 23:48:48,062 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 64 predicate places. [2023-08-29 23:48:48,062 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 318 transitions, 3238 flow [2023-08-29 23:48:48,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:48,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:48:48,062 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:48:48,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:48:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:48,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:48:48,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:48:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1005457732, now seen corresponding path program 3 times [2023-08-29 23:48:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:48:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908453507] [2023-08-29 23:48:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:48:48,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:48:48,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:48:48,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:48:48,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:48:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:48:48,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:48:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:48:48,537 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:48:48,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:48:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:48:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:51,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:48:51,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908453507] [2023-08-29 23:48:51,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908453507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:48:51,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:48:51,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:48:51,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063480957] [2023-08-29 23:48:51,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:48:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:48:51,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:48:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:48:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:49:15,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 511 [2023-08-29 23:49:15,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 318 transitions, 3238 flow. Second operand has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:15,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:49:15,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 511 [2023-08-29 23:49:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15