./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:59:41,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:59:41,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:59:41,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:59:41,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:59:41,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:59:41,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:59:41,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:59:41,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:59:41,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:59:41,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:59:41,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:59:41,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:59:41,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:59:41,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:59:41,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:59:41,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:59:41,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:59:41,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:59:41,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:59:41,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:59:41,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:59:41,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:59:41,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:59:41,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:59:41,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:59:41,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:59:41,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:59:41,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:59:41,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:59:41,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:59:41,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:59:41,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:59:41,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:59:41,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:59:41,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:59:41,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:59:41,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:59:41,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:59:41,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:59:41,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:59:41,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:59:41,329 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:59:41,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:59:41,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:59:41,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:59:41,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:59:41,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:59:41,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:59:41,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:59:41,333 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:59:41,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:59:41,334 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:59:41,334 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:59:41,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:59:41,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:59:41,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:59:41,336 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:59:41,336 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:59:41,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:59:41,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:59:41,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:59:41,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:59:41,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:59:41,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:59:41,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:59:41,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:59:41,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:59:41,338 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:59:41,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:59:41,338 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:59:41,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:59:41,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:59:41,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:59:41,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:59:41,658 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:59:41,659 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:59:41,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 06:59:42,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:59:43,058 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:59:43,058 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 06:59:43,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3a4a1b25/56c26ce3146b4a3a9eb68ef594771b32/FLAG3826a894c [2023-08-30 06:59:43,090 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3a4a1b25/56c26ce3146b4a3a9eb68ef594771b32 [2023-08-30 06:59:43,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:59:43,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:59:43,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:59:43,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:59:43,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:59:43,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:43" (1/1) ... [2023-08-30 06:59:43,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21400e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:43, skipping insertion in model container [2023-08-30 06:59:43,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:43" (1/1) ... [2023-08-30 06:59:43,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:59:43,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:59:43,320 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 06:59:43,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:59:43,350 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:59:43,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7da464b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:43, skipping insertion in model container [2023-08-30 06:59:43,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:59:43,352 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:59:43,354 INFO L158 Benchmark]: Toolchain (without parser) took 258.66ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 30.2MB in the beginning and 57.0MB in the end (delta: -26.8MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2023-08-30 06:59:43,355 INFO L158 Benchmark]: CDTParser took 0.78ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.8MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:59:43,356 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.82ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 30.0MB in the beginning and 57.0MB in the end (delta: -27.0MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2023-08-30 06:59:43,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.8MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.82ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 30.0MB in the beginning and 57.0MB in the end (delta: -27.0MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:59:45,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:59:45,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:59:45,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:59:45,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:59:45,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:59:45,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:59:45,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:59:45,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:59:45,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:59:45,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:59:45,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:59:45,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:59:45,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:59:45,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:59:45,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:59:45,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:59:45,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:59:45,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:59:45,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:59:45,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:59:45,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:59:45,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:59:45,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:59:45,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:59:45,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:59:45,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:59:45,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:59:45,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:59:45,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:59:45,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:59:45,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:59:45,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:59:45,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:59:45,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:59:45,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:59:45,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:59:45,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:59:45,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:59:45,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:59:45,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:59:45,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:59:45,218 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:59:45,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:59:45,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:59:45,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:59:45,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:59:45,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:59:45,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:59:45,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:59:45,221 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:59:45,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:59:45,222 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:59:45,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:59:45,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:59:45,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:59:45,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:59:45,223 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:59:45,223 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:59:45,224 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:59:45,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:59:45,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:59:45,224 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:59:45,224 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:59:45,225 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:59:45,225 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:59:45,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:59:45,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:59:45,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:59:45,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:59:45,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:59:45,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:59:45,226 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:59:45,226 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:59:45,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:59:45,227 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:59:45,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:59:45,227 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:59:45,227 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:59:45,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:59:45,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:59:45,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:59:45,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:59:45,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:59:45,550 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:59:45,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 06:59:46,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:59:47,003 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:59:47,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 06:59:47,009 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c305af5ac/a31d1a2f94234d309a6854613e4a8551/FLAG2b7a2e32b [2023-08-30 06:59:47,019 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c305af5ac/a31d1a2f94234d309a6854613e4a8551 [2023-08-30 06:59:47,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:59:47,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:59:47,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:59:47,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:59:47,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:59:47,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757557ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47, skipping insertion in model container [2023-08-30 06:59:47,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:59:47,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:59:47,231 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 06:59:47,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:59:47,264 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:59:47,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:59:47,298 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 06:59:47,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:59:47,312 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:59:47,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 06:59:47,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:59:47,370 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:59:47,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47 WrapperNode [2023-08-30 06:59:47,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:59:47,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:59:47,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:59:47,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:59:47,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,425 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-30 06:59:47,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:59:47,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:59:47,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:59:47,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:59:47,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:59:47,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:59:47,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:59:47,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:59:47,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (1/1) ... [2023-08-30 06:59:47,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:59:47,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:59:47,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:59:47,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:59:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:59:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:59:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:59:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:59:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:59:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:59:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:59:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:59:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:59:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:59:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:59:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:59:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:59:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:59:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:59:47,589 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:59:47,769 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:59:47,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:59:48,233 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:59:48,240 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:59:48,242 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:59:48,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:48 BoogieIcfgContainer [2023-08-30 06:59:48,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:59:48,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:59:48,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:59:48,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:59:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:59:47" (1/3) ... [2023-08-30 06:59:48,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190825f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:48, skipping insertion in model container [2023-08-30 06:59:48,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:47" (2/3) ... [2023-08-30 06:59:48,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190825f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:48, skipping insertion in model container [2023-08-30 06:59:48,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:48" (3/3) ... [2023-08-30 06:59:48,254 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-08-30 06:59:48,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:59:48,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:59:48,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:59:48,400 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:59:48,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 202 transitions, 428 flow [2023-08-30 06:59:48,535 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-08-30 06:59:48,538 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:59:48,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 15/199 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 06:59:48,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 202 transitions, 428 flow [2023-08-30 06:59:48,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 195 transitions, 408 flow [2023-08-30 06:59:48,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:59:48,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 195 transitions, 408 flow [2023-08-30 06:59:48,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 195 transitions, 408 flow [2023-08-30 06:59:48,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 195 transitions, 408 flow [2023-08-30 06:59:48,631 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-08-30 06:59:48,632 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:59:48,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 15/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 06:59:48,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2023-08-30 07:00:07,089 INFO L134 LiptonReduction]: Checked pairs total: 7687 [2023-08-30 07:00:07,089 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-08-30 07:00:07,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:00:07,107 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;@3ef6489f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:00:07,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 07:00:07,110 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:00:07,111 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:00:07,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:07,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:00:07,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:07,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 24835, now seen corresponding path program 1 times [2023-08-30 07:00:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618787054] [2023-08-30 07:00:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:07,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:07,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:07,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:00:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:07,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:00:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:07,428 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:00:07,429 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:00:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:07,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:07,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618787054] [2023-08-30 07:00:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618787054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:07,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:07,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803310528] [2023-08-30 07:00:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:07,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 07:00:07,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:07,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:07,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 07:00:07,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:08,666 INFO L130 PetriNetUnfolder]: 6860/8459 cut-off events. [2023-08-30 07:00:08,666 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 07:00:08,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 8459 events. 6860/8459 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35807 event pairs, 3109 based on Foata normal form. 0/2120 useless extension candidates. Maximal degree in co-relation 15308. Up to 8403 conditions per place. [2023-08-30 07:00:08,775 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 07:00:08,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 212 flow [2023-08-30 07:00:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-30 07:00:08,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247758761206194 [2023-08-30 07:00:08,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-30 07:00:08,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-30 07:00:08,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:08,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-30 07:00:08,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:08,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:08,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:08,865 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 592 transitions. [2023-08-30 07:00:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 212 flow [2023-08-30 07:00:08,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:00:08,878 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 108 flow [2023-08-30 07:00:08,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-30 07:00:08,883 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-30 07:00:08,883 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 108 flow [2023-08-30 07:00:08,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:08,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:08,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:00:08,893 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 (2)] Ended with exit code 0 [2023-08-30 07:00:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:09,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:09,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-08-30 07:00:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098214497] [2023-08-30 07:00:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:09,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:09,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:09,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:00:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:00:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:09,282 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:09,282 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:09,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:09,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098214497] [2023-08-30 07:00:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098214497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018900808] [2023-08-30 07:00:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:09,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 07:00:09,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:09,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:09,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 07:00:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:11,252 INFO L130 PetriNetUnfolder]: 13705/16902 cut-off events. [2023-08-30 07:00:11,252 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:00:11,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33809 conditions, 16902 events. 13705/16902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 77823 event pairs, 6215 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 33803. Up to 8401 conditions per place. [2023-08-30 07:00:11,356 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 90 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-30 07:00:11,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 388 flow [2023-08-30 07:00:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 07:00:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158924205378973 [2023-08-30 07:00:11,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 07:00:11,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 07:00:11,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:11,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 07:00:11,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:11,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:11,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:11,366 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 108 flow. Second operand 3 states and 633 transitions. [2023-08-30 07:00:11,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 388 flow [2023-08-30 07:00:11,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:00:11,369 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 119 flow [2023-08-30 07:00:11,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 07:00:11,370 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 07:00:11,370 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 119 flow [2023-08-30 07:00:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:11,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:11,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:00:11,385 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 (3)] Ended with exit code 0 [2023-08-30 07:00:11,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:11,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:11,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-08-30 07:00:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991507320] [2023-08-30 07:00:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:11,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:11,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:11,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:00:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:00:11,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:11,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:11,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:11,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991507320] [2023-08-30 07:00:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991507320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481218812] [2023-08-30 07:00:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:11,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:11,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:11,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 409 [2023-08-30 07:00:11,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:11,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:11,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 409 [2023-08-30 07:00:11,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:12,524 INFO L130 PetriNetUnfolder]: 6860/8460 cut-off events. [2023-08-30 07:00:12,525 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 07:00:12,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16931 conditions, 8460 events. 6860/8460 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35978 event pairs, 3109 based on Foata normal form. 1/2123 useless extension candidates. Maximal degree in co-relation 16923. Up to 8404 conditions per place. [2023-08-30 07:00:12,571 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 46 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-30 07:00:12,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 215 flow [2023-08-30 07:00:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 07:00:12,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655256723716384 [2023-08-30 07:00:12,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 07:00:12,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 07:00:12,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:12,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 07:00:12,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:12,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:12,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:12,580 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 119 flow. Second operand 3 states and 597 transitions. [2023-08-30 07:00:12,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 215 flow [2023-08-30 07:00:12,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 211 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:00:12,583 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 127 flow [2023-08-30 07:00:12,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-30 07:00:12,586 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-30 07:00:12,589 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 127 flow [2023-08-30 07:00:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:12,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:12,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:00:12,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:12,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:12,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash 772242, now seen corresponding path program 1 times [2023-08-30 07:00:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:12,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689437658] [2023-08-30 07:00:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:12,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:12,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:12,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:12,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:00:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:00:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:12,976 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 07:00:12,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 07:00:13,000 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:00:13,000 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 23 treesize of output 19 [2023-08-30 07:00:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:13,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:13,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:13,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689437658] [2023-08-30 07:00:13,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689437658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:13,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:13,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:00:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139153331] [2023-08-30 07:00:13,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:13,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:00:13,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:00:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:00:14,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 07:00:14,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:14,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:14,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 07:00:14,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:15,954 INFO L130 PetriNetUnfolder]: 12176/15084 cut-off events. [2023-08-30 07:00:15,954 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 07:00:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30196 conditions, 15084 events. 12176/15084 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 69218 event pairs, 5515 based on Foata normal form. 0/3897 useless extension candidates. Maximal degree in co-relation 30186. Up to 8389 conditions per place. [2023-08-30 07:00:16,025 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 89 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2023-08-30 07:00:16,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 461 flow [2023-08-30 07:00:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:00:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:00:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1301 transitions. [2023-08-30 07:00:16,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544184421935033 [2023-08-30 07:00:16,030 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1301 transitions. [2023-08-30 07:00:16,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1301 transitions. [2023-08-30 07:00:16,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:16,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1301 transitions. [2023-08-30 07:00:16,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.85714285714286) internal successors, (1301), 7 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:16,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:16,040 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:16,040 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 127 flow. Second operand 7 states and 1301 transitions. [2023-08-30 07:00:16,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 461 flow [2023-08-30 07:00:16,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:00:16,043 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 204 flow [2023-08-30 07:00:16,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-08-30 07:00:16,044 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 07:00:16,044 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 204 flow [2023-08-30 07:00:16,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:16,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:16,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:00:16,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:16,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:16,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:16,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 772244, now seen corresponding path program 1 times [2023-08-30 07:00:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:16,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610804798] [2023-08-30 07:00:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:16,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:16,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:16,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:00:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:00:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:16,414 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 07:00:16,417 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 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 07:00:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:16,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:16,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610804798] [2023-08-30 07:00:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610804798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:16,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438271686] [2023-08-30 07:00:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:16,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 07:00:16,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:16,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:16,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 07:00:16,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:17,738 INFO L130 PetriNetUnfolder]: 9123/11440 cut-off events. [2023-08-30 07:00:17,738 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 07:00:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 11440 events. 9123/11440 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 53163 event pairs, 4118 based on Foata normal form. 0/3445 useless extension candidates. Maximal degree in co-relation 23161. Up to 11328 conditions per place. [2023-08-30 07:00:17,788 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 07:00:17,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 284 flow [2023-08-30 07:00:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-30 07:00:17,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840260798696005 [2023-08-30 07:00:17,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-30 07:00:17,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-30 07:00:17,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:17,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-30 07:00:17,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:17,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:17,796 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 204 flow. Second operand 3 states and 587 transitions. [2023-08-30 07:00:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 284 flow [2023-08-30 07:00:17,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 272 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 07:00:17,801 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 170 flow [2023-08-30 07:00:17,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-30 07:00:17,804 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 07:00:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 170 flow [2023-08-30 07:00:17,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:17,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:17,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:00:17,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:18,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:18,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash 772153, now seen corresponding path program 1 times [2023-08-30 07:00:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625521610] [2023-08-30 07:00:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:18,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:18,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:00:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:00:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:18,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:18,175 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:18,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:18,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625521610] [2023-08-30 07:00:18,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625521610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:18,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:18,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:00:18,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694769766] [2023-08-30 07:00:18,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:18,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:00:18,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:18,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:00:18,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:00:19,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-08-30 07:00:19,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:19,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:19,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-08-30 07:00:19,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:20,483 INFO L130 PetriNetUnfolder]: 9108/11423 cut-off events. [2023-08-30 07:00:20,483 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 07:00:20,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23129 conditions, 11423 events. 9108/11423 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 52339 event pairs, 4115 based on Foata normal form. 3/3445 useless extension candidates. Maximal degree in co-relation 23115. Up to 6560 conditions per place. [2023-08-30 07:00:20,538 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 83 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-30 07:00:20,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 438 flow [2023-08-30 07:00:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:00:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:00:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1144 transitions. [2023-08-30 07:00:20,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661776691116544 [2023-08-30 07:00:20,543 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1144 transitions. [2023-08-30 07:00:20,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1144 transitions. [2023-08-30 07:00:20,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:20,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1144 transitions. [2023-08-30 07:00:20,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:20,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:20,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:20,550 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 170 flow. Second operand 6 states and 1144 transitions. [2023-08-30 07:00:20,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 438 flow [2023-08-30 07:00:20,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 429 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:00:20,553 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 171 flow [2023-08-30 07:00:20,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-08-30 07:00:20,554 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-30 07:00:20,554 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 171 flow [2023-08-30 07:00:20,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:20,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:20,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:00:20,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:20,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:20,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:20,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:20,764 INFO L85 PathProgramCache]: Analyzing trace with hash 742142876, now seen corresponding path program 1 times [2023-08-30 07:00:20,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567863485] [2023-08-30 07:00:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:20,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:20,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:20,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:00:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:00:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:20,951 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-08-30 07:00:20,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2023-08-30 07:00:20,966 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 26 treesize of output 24 [2023-08-30 07:00:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:21,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:21,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567863485] [2023-08-30 07:00:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567863485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:21,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:21,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:00:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577224939] [2023-08-30 07:00:21,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:00:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:00:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:00:22,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 07:00:22,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:22,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:22,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 07:00:22,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:23,536 INFO L130 PetriNetUnfolder]: 8788/11005 cut-off events. [2023-08-30 07:00:23,536 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 07:00:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22296 conditions, 11005 events. 8788/11005 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 50136 event pairs, 3963 based on Foata normal form. 0/3374 useless extension candidates. Maximal degree in co-relation 22282. Up to 6355 conditions per place. [2023-08-30 07:00:23,587 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 84 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 07:00:23,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 429 flow [2023-08-30 07:00:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:00:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:00:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 942 transitions. [2023-08-30 07:00:23,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606356968215159 [2023-08-30 07:00:23,590 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 942 transitions. [2023-08-30 07:00:23,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 942 transitions. [2023-08-30 07:00:23,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:23,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 942 transitions. [2023-08-30 07:00:23,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.4) internal successors, (942), 5 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:23,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:23,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:23,596 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 171 flow. Second operand 5 states and 942 transitions. [2023-08-30 07:00:23,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 429 flow [2023-08-30 07:00:23,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 410 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 07:00:23,600 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 154 flow [2023-08-30 07:00:23,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-08-30 07:00:23,601 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 07:00:23,601 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 154 flow [2023-08-30 07:00:23,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:23,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:23,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:00:23,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:23,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:23,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash 742142875, now seen corresponding path program 1 times [2023-08-30 07:00:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:23,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788256004] [2023-08-30 07:00:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:23,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:23,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:00:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:00:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:23,942 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:00:23,943 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 07:00:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:24,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:24,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:24,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788256004] [2023-08-30 07:00:24,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788256004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:24,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:24,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079173910] [2023-08-30 07:00:24,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:24,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 07:00:24,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:24,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:24,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 07:00:24,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:24,927 INFO L130 PetriNetUnfolder]: 8482/10601 cut-off events. [2023-08-30 07:00:24,927 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 07:00:24,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21482 conditions, 10601 events. 8482/10601 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48164 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21468. Up to 10489 conditions per place. [2023-08-30 07:00:24,963 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 07:00:24,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 244 flow [2023-08-30 07:00:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-30 07:00:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751426242868786 [2023-08-30 07:00:24,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-30 07:00:24,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-30 07:00:24,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:24,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-30 07:00:24,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:24,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:24,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:24,970 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 154 flow. Second operand 3 states and 583 transitions. [2023-08-30 07:00:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 244 flow [2023-08-30 07:00:24,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:00:24,971 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 147 flow [2023-08-30 07:00:24,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-30 07:00:24,972 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-08-30 07:00:24,972 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 147 flow [2023-08-30 07:00:24,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:24,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:24,973 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:00:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:25,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:25,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:25,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594973, now seen corresponding path program 2 times [2023-08-30 07:00:25,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:25,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859760106] [2023-08-30 07:00:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:00:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:25,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:25,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:00:25,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:00:25,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:00:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:00:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:00:25,336 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 07:00:25,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 07:00:25,352 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:00:25,353 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 23 treesize of output 19 [2023-08-30 07:00:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:00:25,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:25,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859760106] [2023-08-30 07:00:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859760106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:25,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459857355] [2023-08-30 07:00:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:27,532 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] [2023-08-30 07:00:27,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-08-30 07:00:27,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:27,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:27,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-08-30 07:00:27,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:28,609 INFO L130 PetriNetUnfolder]: 8482/10600 cut-off events. [2023-08-30 07:00:28,609 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 07:00:28,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21477 conditions, 10600 events. 8482/10600 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48366 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21463. Up to 10488 conditions per place. [2023-08-30 07:00:28,646 INFO L137 encePairwiseOnDemand]: 407/409 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 07:00:28,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 234 flow [2023-08-30 07:00:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 07:00:28,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710676446617767 [2023-08-30 07:00:28,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 07:00:28,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 07:00:28,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:28,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 07:00:28,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:28,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:28,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:28,652 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 147 flow. Second operand 3 states and 578 transitions. [2023-08-30 07:00:28,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 234 flow [2023-08-30 07:00:28,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:00:28,654 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2023-08-30 07:00:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-30 07:00:28,655 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-08-30 07:00:28,655 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2023-08-30 07:00:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:28,655 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:00:28,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:28,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:28,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:28,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594884, now seen corresponding path program 2 times [2023-08-30 07:00:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229408693] [2023-08-30 07:00:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:00:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:28,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:00:28,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:00:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:00:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:00:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:29,047 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:29,048 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:29,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:29,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229408693] [2023-08-30 07:00:29,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229408693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:29,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:29,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:00:29,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586020362] [2023-08-30 07:00:29,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:29,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:00:29,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:00:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:00:33,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 409 [2023-08-30 07:00:33,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:33,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:33,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 409 [2023-08-30 07:00:33,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:40,158 INFO L130 PetriNetUnfolder]: 43411/53956 cut-off events. [2023-08-30 07:00:40,159 INFO L131 PetriNetUnfolder]: For 1637/1637 co-relation queries the response was YES. [2023-08-30 07:00:40,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109922 conditions, 53956 events. 43411/53956 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 278895 event pairs, 19589 based on Foata normal form. 6/16924 useless extension candidates. Maximal degree in co-relation 109907. Up to 6140 conditions per place. [2023-08-30 07:00:40,420 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 334 selfloop transitions, 12 changer transitions 0/349 dead transitions. [2023-08-30 07:00:40,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 349 transitions, 1533 flow [2023-08-30 07:00:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:00:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:00:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2464 transitions. [2023-08-30 07:00:40,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020374898125509 [2023-08-30 07:00:40,426 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2464 transitions. [2023-08-30 07:00:40,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2464 transitions. [2023-08-30 07:00:40,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:40,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2464 transitions. [2023-08-30 07:00:40,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 205.33333333333334) internal successors, (2464), 12 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:40,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:40,438 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:40,438 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 2464 transitions. [2023-08-30 07:00:40,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 349 transitions, 1533 flow [2023-08-30 07:00:40,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 349 transitions, 1532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:00:40,450 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 227 flow [2023-08-30 07:00:40,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=227, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-30 07:00:40,451 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-30 07:00:40,451 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 227 flow [2023-08-30 07:00:40,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:40,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:40,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:00:40,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:40,665 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:40,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585866, now seen corresponding path program 1 times [2023-08-30 07:00:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549294308] [2023-08-30 07:00:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:40,666 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 [2023-08-30 07:00:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:40,667 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:40,668 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 (12)] Waiting until timeout for monitored process [2023-08-30 07:00:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:00:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:40,789 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:00:40,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:00:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:40,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:40,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549294308] [2023-08-30 07:00:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549294308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:40,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:00:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817682587] [2023-08-30 07:00:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:00:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:00:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:00:40,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 409 [2023-08-30 07:00:40,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:40,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:40,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 409 [2023-08-30 07:00:40,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:43,619 INFO L130 PetriNetUnfolder]: 26945/33788 cut-off events. [2023-08-30 07:00:43,619 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-08-30 07:00:43,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68825 conditions, 33788 events. 26945/33788 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 169677 event pairs, 11868 based on Foata normal form. 0/11939 useless extension candidates. Maximal degree in co-relation 68802. Up to 33397 conditions per place. [2023-08-30 07:00:43,826 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 45 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-08-30 07:00:43,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 53 transitions, 321 flow [2023-08-30 07:00:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:00:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:00:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2023-08-30 07:00:43,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031784841075793 [2023-08-30 07:00:43,830 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2023-08-30 07:00:43,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2023-08-30 07:00:43,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:43,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2023-08-30 07:00:43,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:43,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:43,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:43,835 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 227 flow. Second operand 4 states and 704 transitions. [2023-08-30 07:00:43,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 53 transitions, 321 flow [2023-08-30 07:00:43,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:00:43,838 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 220 flow [2023-08-30 07:00:43,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-08-30 07:00:43,838 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-30 07:00:43,838 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 220 flow [2023-08-30 07:00:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:43,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:43,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:00:43,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:44,048 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:44,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585893, now seen corresponding path program 1 times [2023-08-30 07:00:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:44,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658382183] [2023-08-30 07:00:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:44,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:44,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:00:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:00:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:44,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:44,233 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:44,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:44,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658382183] [2023-08-30 07:00:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658382183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:44,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:00:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603885834] [2023-08-30 07:00:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:00:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:00:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:00:44,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-08-30 07:00:44,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:44,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:44,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-08-30 07:00:44,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:48,478 INFO L130 PetriNetUnfolder]: 37949/48572 cut-off events. [2023-08-30 07:00:48,478 INFO L131 PetriNetUnfolder]: For 1882/1882 co-relation queries the response was YES. [2023-08-30 07:00:48,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99338 conditions, 48572 events. 37949/48572 cut-off events. For 1882/1882 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 269488 event pairs, 8548 based on Foata normal form. 0/19556 useless extension candidates. Maximal degree in co-relation 99314. Up to 30904 conditions per place. [2023-08-30 07:00:48,787 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 73 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2023-08-30 07:00:48,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 449 flow [2023-08-30 07:00:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:00:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:00:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 945 transitions. [2023-08-30 07:00:48,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621026894865526 [2023-08-30 07:00:48,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 945 transitions. [2023-08-30 07:00:48,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 945 transitions. [2023-08-30 07:00:48,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:48,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 945 transitions. [2023-08-30 07:00:48,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,795 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 220 flow. Second operand 5 states and 945 transitions. [2023-08-30 07:00:48,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 449 flow [2023-08-30 07:00:48,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:00:48,798 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 245 flow [2023-08-30 07:00:48,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-30 07:00:48,798 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-08-30 07:00:48,798 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 245 flow [2023-08-30 07:00:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:48,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:49,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:49,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:49,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:49,010 INFO L85 PathProgramCache]: Analyzing trace with hash 234748074, now seen corresponding path program 1 times [2023-08-30 07:00:49,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:49,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131107657] [2023-08-30 07:00:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:49,011 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:49,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:00:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:00:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:49,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:00:49,232 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:00:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:49,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:00:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:00:49,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:49,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131107657] [2023-08-30 07:00:49,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131107657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:00:49,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:00:49,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:00:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029530476] [2023-08-30 07:00:49,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:00:49,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:00:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:00:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:00:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 07:00:50,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:50,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:50,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 07:00:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:54,035 INFO L130 PetriNetUnfolder]: 31546/40642 cut-off events. [2023-08-30 07:00:54,035 INFO L131 PetriNetUnfolder]: For 4844/5731 co-relation queries the response was YES. [2023-08-30 07:00:54,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90125 conditions, 40642 events. 31546/40642 cut-off events. For 4844/5731 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 227780 event pairs, 16100 based on Foata normal form. 887/18951 useless extension candidates. Maximal degree in co-relation 90100. Up to 36844 conditions per place. [2023-08-30 07:00:54,278 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 80 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-30 07:00:54,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 502 flow [2023-08-30 07:00:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:00:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:00:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2023-08-30 07:00:54,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45330073349633254 [2023-08-30 07:00:54,280 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2023-08-30 07:00:54,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2023-08-30 07:00:54,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:54,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2023-08-30 07:00:54,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:54,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:54,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:54,284 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 245 flow. Second operand 5 states and 927 transitions. [2023-08-30 07:00:54,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 502 flow [2023-08-30 07:00:54,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:00:54,289 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 234 flow [2023-08-30 07:00:54,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-30 07:00:54,290 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-08-30 07:00:54,290 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 234 flow [2023-08-30 07:00:54,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:54,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:54,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:54,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:00:54,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:54,497 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:54,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 234748073, now seen corresponding path program 1 times [2023-08-30 07:00:54,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:54,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709600723] [2023-08-30 07:00:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:54,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:54,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:00:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:54,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:00:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:54,648 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:00:54,649 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 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:00:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:54,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:54,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:54,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709600723] [2023-08-30 07:00:54,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709600723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:54,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:54,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:00:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334977568] [2023-08-30 07:00:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:54,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 409 [2023-08-30 07:00:54,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:54,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:54,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 409 [2023-08-30 07:00:54,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:00:58,165 INFO L130 PetriNetUnfolder]: 30210/38784 cut-off events. [2023-08-30 07:00:58,165 INFO L131 PetriNetUnfolder]: For 4566/5391 co-relation queries the response was YES. [2023-08-30 07:00:58,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84307 conditions, 38784 events. 30210/38784 cut-off events. For 4566/5391 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 213171 event pairs, 15358 based on Foata normal form. 825/18305 useless extension candidates. Maximal degree in co-relation 84282. Up to 38307 conditions per place. [2023-08-30 07:00:58,396 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 07:00:58,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 51 transitions, 326 flow [2023-08-30 07:00:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:00:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:00:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-08-30 07:00:58,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612876935615322 [2023-08-30 07:00:58,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-08-30 07:00:58,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-08-30 07:00:58,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:00:58,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-08-30 07:00:58,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:58,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:58,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:58,400 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 234 flow. Second operand 3 states and 566 transitions. [2023-08-30 07:00:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 51 transitions, 326 flow [2023-08-30 07:00:58,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 51 transitions, 321 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:00:58,407 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 227 flow [2023-08-30 07:00:58,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-08-30 07:00:58,408 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-30 07:00:58,408 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 227 flow [2023-08-30 07:00:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:58,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:00:58,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:00:58,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-30 07:00:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:58,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:00:58,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:00:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 234524665, now seen corresponding path program 1 times [2023-08-30 07:00:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:00:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312632775] [2023-08-30 07:00:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:00:58,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:00:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:00:58,613 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:00:58,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:00:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:00:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 07:00:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:00:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:00:58,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:00:58,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:00:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312632775] [2023-08-30 07:00:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312632775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:00:58,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:00:58,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:00:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026505777] [2023-08-30 07:00:58,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:00:58,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:00:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:00:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:00:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:00:58,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-08-30 07:00:58,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:00:58,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:00:58,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-08-30 07:00:58,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:02,130 INFO L130 PetriNetUnfolder]: 31596/40170 cut-off events. [2023-08-30 07:01:02,131 INFO L131 PetriNetUnfolder]: For 3495/4320 co-relation queries the response was YES. [2023-08-30 07:01:02,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 40170 events. 31596/40170 cut-off events. For 3495/4320 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 219543 event pairs, 5715 based on Foata normal form. 1659/19157 useless extension candidates. Maximal degree in co-relation 86972. Up to 26499 conditions per place. [2023-08-30 07:01:02,330 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 66 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-30 07:01:02,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 420 flow [2023-08-30 07:01:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:01:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:01:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-30 07:01:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979625101874491 [2023-08-30 07:01:02,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-30 07:01:02,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-30 07:01:02,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:01:02,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-30 07:01:02,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:02,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:02,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:02,334 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 227 flow. Second operand 3 states and 611 transitions. [2023-08-30 07:01:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 420 flow [2023-08-30 07:01:02,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:01:02,345 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 232 flow [2023-08-30 07:01:02,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-30 07:01:02,345 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-30 07:01:02,345 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 232 flow [2023-08-30 07:01:02,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:02,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:01:02,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:01:02,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:01:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:02,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:01:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:01:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750536, now seen corresponding path program 1 times [2023-08-30 07:01:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:01:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495218546] [2023-08-30 07:01:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:01:02,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:01:02,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:01:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:01:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:01:02,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:01:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:01:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:01:02,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:01:02,866 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 25 treesize of output 21 [2023-08-30 07:01:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:01:02,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:02,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495218546] [2023-08-30 07:01:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495218546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:01:02,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:01:02,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:01:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288925219] [2023-08-30 07:01:02,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:01:02,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:01:02,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:01:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:01:04,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2023-08-30 07:01:04,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:04,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:04,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2023-08-30 07:01:04,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:11,544 INFO L130 PetriNetUnfolder]: 56679/73869 cut-off events. [2023-08-30 07:01:11,544 INFO L131 PetriNetUnfolder]: For 13223/14989 co-relation queries the response was YES. [2023-08-30 07:01:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163011 conditions, 73869 events. 56679/73869 cut-off events. For 13223/14989 co-relation queries the response was YES. Maximal size of possible extension queue 3635. Compared 457834 event pairs, 10577 based on Foata normal form. 1766/37352 useless extension candidates. Maximal degree in co-relation 162986. Up to 24832 conditions per place. [2023-08-30 07:01:12,028 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 159 selfloop transitions, 20 changer transitions 0/181 dead transitions. [2023-08-30 07:01:12,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 181 transitions, 947 flow [2023-08-30 07:01:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:01:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:01:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2058 transitions. [2023-08-30 07:01:12,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45743498555234496 [2023-08-30 07:01:12,032 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2058 transitions. [2023-08-30 07:01:12,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2058 transitions. [2023-08-30 07:01:12,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:01:12,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2058 transitions. [2023-08-30 07:01:12,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.0909090909091) internal successors, (2058), 11 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:12,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:12,039 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:12,039 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 232 flow. Second operand 11 states and 2058 transitions. [2023-08-30 07:01:12,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 181 transitions, 947 flow [2023-08-30 07:01:12,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 181 transitions, 925 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:01:12,046 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 348 flow [2023-08-30 07:01:12,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=348, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-08-30 07:01:12,046 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-08-30 07:01:12,046 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 348 flow [2023-08-30 07:01:12,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:12,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:01:12,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:01:12,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:01:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:12,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:01:12,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:01:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750509, now seen corresponding path program 1 times [2023-08-30 07:01:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:01:12,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297307887] [2023-08-30 07:01:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:01:12,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:12,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:01:12,259 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:01:12,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:01:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:01:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:01:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:01:12,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:01:12,417 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:01:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:01:12,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:01:12,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:12,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297307887] [2023-08-30 07:01:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297307887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:01:12,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:01:12,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:01:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418798569] [2023-08-30 07:01:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:01:12,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:01:12,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:01:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:01:12,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-08-30 07:01:12,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:12,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:12,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-08-30 07:01:12,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:19,461 INFO L130 PetriNetUnfolder]: 53142/68968 cut-off events. [2023-08-30 07:01:19,461 INFO L131 PetriNetUnfolder]: For 37414/39031 co-relation queries the response was YES. [2023-08-30 07:01:19,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184401 conditions, 68968 events. 53142/68968 cut-off events. For 37414/39031 co-relation queries the response was YES. Maximal size of possible extension queue 3385. Compared 419185 event pairs, 22966 based on Foata normal form. 1617/44744 useless extension candidates. Maximal degree in co-relation 184369. Up to 51474 conditions per place. [2023-08-30 07:01:20,095 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 72 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 07:01:20,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 582 flow [2023-08-30 07:01:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:01:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:01:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 924 transitions. [2023-08-30 07:01:20,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45183374083129585 [2023-08-30 07:01:20,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 924 transitions. [2023-08-30 07:01:20,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 924 transitions. [2023-08-30 07:01:20,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:01:20,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 924 transitions. [2023-08-30 07:01:20,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:20,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:20,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:20,102 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 348 flow. Second operand 5 states and 924 transitions. [2023-08-30 07:01:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 582 flow [2023-08-30 07:01:21,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 565 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 07:01:21,299 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 363 flow [2023-08-30 07:01:21,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2023-08-30 07:01:21,299 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2023-08-30 07:01:21,300 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 363 flow [2023-08-30 07:01:21,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:21,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:01:21,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:01:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:01:21,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:21,507 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:01:21,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:01:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1319717587, now seen corresponding path program 1 times [2023-08-30 07:01:21,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:01:21,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667758982] [2023-08-30 07:01:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:01:21,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:01:21,509 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:01:21,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:01:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:01:21,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:01:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:01:21,706 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:01:21,707 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:01:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:01:21,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:01:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:01:22,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667758982] [2023-08-30 07:01:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667758982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:01:22,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:01:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:01:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901476558] [2023-08-30 07:01:22,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:01:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:01:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:01:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:01:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-08-30 07:01:27,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 363 flow. Second operand has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:27,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:27,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-08-30 07:01:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:35,252 INFO L130 PetriNetUnfolder]: 49643/64865 cut-off events. [2023-08-30 07:01:35,252 INFO L131 PetriNetUnfolder]: For 78591/83995 co-relation queries the response was YES. [2023-08-30 07:01:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181182 conditions, 64865 events. 49643/64865 cut-off events. For 78591/83995 co-relation queries the response was YES. Maximal size of possible extension queue 3187. Compared 390279 event pairs, 26496 based on Foata normal form. 5526/48251 useless extension candidates. Maximal degree in co-relation 181150. Up to 56012 conditions per place. [2023-08-30 07:01:35,740 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 118 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-30 07:01:35,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 879 flow [2023-08-30 07:01:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:01:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:01:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1438 transitions. [2023-08-30 07:01:35,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394865525672372 [2023-08-30 07:01:35,744 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1438 transitions. [2023-08-30 07:01:35,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1438 transitions. [2023-08-30 07:01:35,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:01:35,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1438 transitions. [2023-08-30 07:01:35,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.75) internal successors, (1438), 8 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:35,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:35,748 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:35,748 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 363 flow. Second operand 8 states and 1438 transitions. [2023-08-30 07:01:35,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 879 flow [2023-08-30 07:01:35,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 847 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:01:35,845 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 364 flow [2023-08-30 07:01:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2023-08-30 07:01:35,845 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 07:01:35,845 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 364 flow [2023-08-30 07:01:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:01:35,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:01:35,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:01:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:36,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:01:36,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:01:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2040558231, now seen corresponding path program 1 times [2023-08-30 07:01:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:01:36,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254047281] [2023-08-30 07:01:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:01:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:01:36,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:01:36,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:01:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:01:36,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 07:01:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:01:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:01:36,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:01:36,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254047281] [2023-08-30 07:01:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254047281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:01:36,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:01:36,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:01:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165584418] [2023-08-30 07:01:36,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:01:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:01:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:01:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:01:36,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-08-30 07:01:36,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:36,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:36,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-08-30 07:01:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:01:41,348 INFO L130 PetriNetUnfolder]: 44932/58675 cut-off events. [2023-08-30 07:01:41,348 INFO L131 PetriNetUnfolder]: For 45564/53205 co-relation queries the response was YES. [2023-08-30 07:01:41,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160499 conditions, 58675 events. 44932/58675 cut-off events. For 45564/53205 co-relation queries the response was YES. Maximal size of possible extension queue 2940. Compared 359926 event pairs, 7433 based on Foata normal form. 8881/47663 useless extension candidates. Maximal degree in co-relation 160465. Up to 43614 conditions per place. [2023-08-30 07:01:41,810 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 73 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-08-30 07:01:41,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 580 flow [2023-08-30 07:01:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:01:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:01:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-30 07:01:41,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963325183374083 [2023-08-30 07:01:41,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-30 07:01:41,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-30 07:01:41,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:01:41,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-30 07:01:41,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:41,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:41,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:41,814 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 364 flow. Second operand 3 states and 609 transitions. [2023-08-30 07:01:41,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 580 flow [2023-08-30 07:01:41,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:01:41,905 INFO L231 Difference]: Finished difference. Result has 89 places, 62 transitions, 359 flow [2023-08-30 07:01:41,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=89, PETRI_TRANSITIONS=62} [2023-08-30 07:01:41,905 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 07:01:41,905 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 62 transitions, 359 flow [2023-08-30 07:01:41,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:41,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:01:41,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:01:41,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:01:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:42,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:01:42,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:01:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash -761061214, now seen corresponding path program 2 times [2023-08-30 07:01:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:01:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565698735] [2023-08-30 07:01:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:01:42,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:01:42,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:01:42,117 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:01:42,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:01:42,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:01:42,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:01:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:01:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:01:42,293 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:01:42,294 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:01:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:01:42,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:01:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:01:43,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:01:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565698735] [2023-08-30 07:01:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565698735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:01:43,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:01:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:01:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854067665] [2023-08-30 07:01:43,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:01:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:01:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:01:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:01:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:01:48,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2023-08-30 07:01:48,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 62 transitions, 359 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:01:48,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:01:48,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2023-08-30 07:01:48,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:02:05,184 INFO L130 PetriNetUnfolder]: 107393/138543 cut-off events. [2023-08-30 07:02:05,184 INFO L131 PetriNetUnfolder]: For 146347/158019 co-relation queries the response was YES. [2023-08-30 07:02:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380869 conditions, 138543 events. 107393/138543 cut-off events. For 146347/158019 co-relation queries the response was YES. Maximal size of possible extension queue 6067. Compared 891159 event pairs, 10427 based on Foata normal form. 15800/107566 useless extension candidates. Maximal degree in co-relation 380835. Up to 29328 conditions per place. [2023-08-30 07:02:06,489 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 224 selfloop transitions, 19 changer transitions 0/246 dead transitions. [2023-08-30 07:02:06,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 246 transitions, 1609 flow [2023-08-30 07:02:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:02:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:02:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-08-30 07:02:06,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456768170704601 [2023-08-30 07:02:06,495 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-08-30 07:02:06,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-08-30 07:02:06,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:06,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-08-30 07:02:06,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:06,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:06,503 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:06,503 INFO L175 Difference]: Start difference. First operand has 89 places, 62 transitions, 359 flow. Second operand 11 states and 2055 transitions. [2023-08-30 07:02:06,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 246 transitions, 1609 flow [2023-08-30 07:02:06,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 246 transitions, 1577 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:02:06,641 INFO L231 Difference]: Finished difference. Result has 101 places, 71 transitions, 447 flow [2023-08-30 07:02:06,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=447, PETRI_PLACES=101, PETRI_TRANSITIONS=71} [2023-08-30 07:02:06,641 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 42 predicate places. [2023-08-30 07:02:06,641 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 71 transitions, 447 flow [2023-08-30 07:02:06,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:06,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:02:06,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:02:06,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-30 07:02:06,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:06,852 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:02:06,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:02:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1173589599, now seen corresponding path program 1 times [2023-08-30 07:02:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:02:06,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208070478] [2023-08-30 07:02:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:02:06,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:02:06,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:02:06,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:02:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:02:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:02:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:02:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:02:07,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:02:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:02:07,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:02:07,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208070478] [2023-08-30 07:02:07,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208070478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:02:07,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:02:07,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 07:02:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588206811] [2023-08-30 07:02:07,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:02:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:02:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:02:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:02:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:02:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-08-30 07:02:07,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 71 transitions, 447 flow. Second operand has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:07,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:02:07,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-08-30 07:02:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:02:19,982 INFO L130 PetriNetUnfolder]: 86839/116346 cut-off events. [2023-08-30 07:02:19,982 INFO L131 PetriNetUnfolder]: For 192952/211048 co-relation queries the response was YES. [2023-08-30 07:02:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373801 conditions, 116346 events. 86839/116346 cut-off events. For 192952/211048 co-relation queries the response was YES. Maximal size of possible extension queue 3911. Compared 751387 event pairs, 49645 based on Foata normal form. 18096/116116 useless extension candidates. Maximal degree in co-relation 373762. Up to 94316 conditions per place. [2023-08-30 07:02:21,060 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 130 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2023-08-30 07:02:21,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1064 flow [2023-08-30 07:02:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:02:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:02:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1477 transitions. [2023-08-30 07:02:21,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514058679706601 [2023-08-30 07:02:21,063 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1477 transitions. [2023-08-30 07:02:21,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1477 transitions. [2023-08-30 07:02:21,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:21,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1477 transitions. [2023-08-30 07:02:21,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:21,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:21,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:21,067 INFO L175 Difference]: Start difference. First operand has 101 places, 71 transitions, 447 flow. Second operand 8 states and 1477 transitions. [2023-08-30 07:02:21,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1064 flow [2023-08-30 07:02:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1045 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 07:02:21,313 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 468 flow [2023-08-30 07:02:21,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2023-08-30 07:02:21,314 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 49 predicate places. [2023-08-30 07:02:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 468 flow [2023-08-30 07:02:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:21,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:02:21,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:02:21,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-08-30 07:02:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:21,515 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:02:21,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:02:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1822482052, now seen corresponding path program 1 times [2023-08-30 07:02:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:02:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956977459] [2023-08-30 07:02:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:02:21,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:21,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:02:21,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:02:21,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:02:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:02:21,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:02:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:02:21,683 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:02:21,683 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:02:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:02:21,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:02:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:02:22,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:02:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956977459] [2023-08-30 07:02:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956977459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:02:22,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:02:22,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-08-30 07:02:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632794089] [2023-08-30 07:02:22,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:02:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:02:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:02:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:02:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:02:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-08-30 07:02:27,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 468 flow. Second operand has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:27,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:02:27,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-08-30 07:02:27,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:02:43,510 INFO L130 PetriNetUnfolder]: 110315/142336 cut-off events. [2023-08-30 07:02:43,510 INFO L131 PetriNetUnfolder]: For 178018/185539 co-relation queries the response was YES. [2023-08-30 07:02:44,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490634 conditions, 142336 events. 110315/142336 cut-off events. For 178018/185539 co-relation queries the response was YES. Maximal size of possible extension queue 6549. Compared 910361 event pairs, 61381 based on Foata normal form. 7543/124274 useless extension candidates. Maximal degree in co-relation 490592. Up to 127332 conditions per place. [2023-08-30 07:02:45,205 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 103 selfloop transitions, 8 changer transitions 3/118 dead transitions. [2023-08-30 07:02:45,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 118 transitions, 876 flow [2023-08-30 07:02:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:02:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:02:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1424 transitions. [2023-08-30 07:02:45,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352078239608802 [2023-08-30 07:02:45,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1424 transitions. [2023-08-30 07:02:45,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1424 transitions. [2023-08-30 07:02:45,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:45,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1424 transitions. [2023-08-30 07:02:45,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:45,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:45,211 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:45,212 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 468 flow. Second operand 8 states and 1424 transitions. [2023-08-30 07:02:45,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 118 transitions, 876 flow [2023-08-30 07:02:47,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 861 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 07:02:47,281 INFO L231 Difference]: Finished difference. Result has 110 places, 68 transitions, 442 flow [2023-08-30 07:02:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=110, PETRI_TRANSITIONS=68} [2023-08-30 07:02:47,281 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2023-08-30 07:02:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 68 transitions, 442 flow [2023-08-30 07:02:47,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:47,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:02:47,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:02:47,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:02:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:47,485 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 07:02:47,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:02:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1901873738, now seen corresponding path program 1 times [2023-08-30 07:02:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:02:47,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285554264] [2023-08-30 07:02:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:02:47,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:02:47,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:02:47,486 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:02:47,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:02:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:02:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:02:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:02:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:02:47,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:02:47,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:02:47,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285554264] [2023-08-30 07:02:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285554264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:02:47,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:02:47,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:02:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338548931] [2023-08-30 07:02:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:02:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:02:47,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:02:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:02:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:02:47,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-08-30 07:02:47,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 68 transitions, 442 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:47,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:02:47,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-08-30 07:02:47,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:02:57,676 INFO L130 PetriNetUnfolder]: 71239/93303 cut-off events. [2023-08-30 07:02:57,676 INFO L131 PetriNetUnfolder]: For 126811/141470 co-relation queries the response was YES. [2023-08-30 07:02:58,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313902 conditions, 93303 events. 71239/93303 cut-off events. For 126811/141470 co-relation queries the response was YES. Maximal size of possible extension queue 4391. Compared 596898 event pairs, 42557 based on Foata normal form. 21787/100119 useless extension candidates. Maximal degree in co-relation 313861. Up to 93186 conditions per place. [2023-08-30 07:02:58,914 INFO L137 encePairwiseOnDemand]: 407/409 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 07:02:58,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 67 transitions, 560 flow [2023-08-30 07:02:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:02:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:02:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-30 07:02:58,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46454767726161367 [2023-08-30 07:02:58,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-30 07:02:58,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-30 07:02:58,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:02:58,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-30 07:02:58,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:58,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:58,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:02:58,921 INFO L175 Difference]: Start difference. First operand has 110 places, 68 transitions, 442 flow. Second operand 3 states and 570 transitions. [2023-08-30 07:02:58,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 67 transitions, 560 flow