./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-symm.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/chl-word-symm.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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --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 05:19:22,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:19:22,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:19:22,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:19:22,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:19:22,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:19:22,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:19:22,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:19:22,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:19:22,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:19:22,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:19:22,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:19:22,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:19:22,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:19:22,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:19:22,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:19:22,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:19:22,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:19:22,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:19:22,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:19:22,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:19:22,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:19:22,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:19:22,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:19:22,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:19:22,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:19:22,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:19:22,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:19:22,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:19:22,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:19:22,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:19:22,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:19:22,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:19:22,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:19:22,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:19:22,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:19:22,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:19:22,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:19:22,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:19:22,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:19:22,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:19:22,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:19:22,332 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:19:22,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:19:22,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:19:22,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:19:22,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:19:22,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:19:22,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:19:22,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:19:22,335 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:19:22,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:19:22,336 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:19:22,336 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:19:22,337 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:19:22,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:19:22,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:19:22,338 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:19:22,338 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:19:22,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:19:22,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:19:22,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:19:22,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:22,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:19:22,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:19:22,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:19:22,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:19:22,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:19:22,340 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:19:22,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:19:22,340 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:19:22,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:19:22,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:19:22,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:19:22,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:19:22,678 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:19:22,679 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:19:22,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-08-30 05:19:23,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:19:24,203 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:19:24,204 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-08-30 05:19:24,212 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4818287a/eb6f5c8377414633aa3bad0ee69a4168/FLAG692e5535c [2023-08-30 05:19:24,224 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4818287a/eb6f5c8377414633aa3bad0ee69a4168 [2023-08-30 05:19:24,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:19:24,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:19:24,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:24,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:19:24,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:19:24,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:24" (1/1) ... [2023-08-30 05:19:24,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22292779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:24, skipping insertion in model container [2023-08-30 05:19:24,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:24" (1/1) ... [2023-08-30 05:19:24,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:19:24,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:24,397 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/chl-word-symm.wvr.c[2848,2861] [2023-08-30 05:19:24,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:24,417 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 05:19:24,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b4616d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:24, skipping insertion in model container [2023-08-30 05:19:24,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:24,422 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:19:24,424 INFO L158 Benchmark]: Toolchain (without parser) took 196.77ms. Allocated memory is still 60.8MB. Free memory was 38.4MB in the beginning and 42.7MB in the end (delta: -4.3MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2023-08-30 05:19:24,425 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 50.3MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:19:24,426 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.92ms. Allocated memory is still 60.8MB. Free memory was 38.3MB in the beginning and 42.7MB in the end (delta: -4.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2023-08-30 05:19:24,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 50.3MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.92ms. Allocated memory is still 60.8MB. Free memory was 38.3MB in the beginning and 42.7MB in the end (delta: -4.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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/chl-word-symm.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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --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 05:19:26,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:19:26,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:19:26,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:19:26,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:19:26,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:19:26,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:19:26,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:19:26,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:19:26,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:19:26,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:19:26,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:19:26,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:19:26,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:19:26,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:19:26,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:19:26,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:19:26,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:19:26,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:19:26,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:19:26,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:19:26,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:19:26,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:19:26,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:19:26,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:19:26,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:19:26,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:19:26,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:19:26,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:19:26,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:19:26,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:19:26,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:19:26,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:19:26,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:19:26,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:19:26,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:19:26,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:19:26,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:19:26,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:19:26,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:19:26,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:19:26,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:19:26,332 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:19:26,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:19:26,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:19:26,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:19:26,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:19:26,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:19:26,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:19:26,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:19:26,335 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:19:26,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:19:26,336 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:19:26,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:19:26,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:19:26,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:19:26,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:19:26,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:19:26,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:19:26,339 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:19:26,339 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:19:26,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:19:26,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:19:26,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:19:26,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:26,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:19:26,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:19:26,340 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:19:26,341 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:19:26,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:19:26,341 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:19:26,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:19:26,341 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:19:26,342 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:19:26,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:19:26,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:19:26,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:19:26,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:19:26,655 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:19:26,655 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:19:26,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-08-30 05:19:27,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:19:28,080 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:19:28,081 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-08-30 05:19:28,086 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee945ce44/df120421100941d8a91b6256a5e5a389/FLAG9ec420618 [2023-08-30 05:19:28,096 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee945ce44/df120421100941d8a91b6256a5e5a389 [2023-08-30 05:19:28,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:19:28,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:19:28,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:28,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:19:28,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:19:28,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363c35b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28, skipping insertion in model container [2023-08-30 05:19:28,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:19:28,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:28,264 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/chl-word-symm.wvr.c[2848,2861] [2023-08-30 05:19:28,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:28,284 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:19:28,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:19:28,315 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/chl-word-symm.wvr.c[2848,2861] [2023-08-30 05:19:28,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:28,336 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:19:28,413 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/chl-word-symm.wvr.c[2848,2861] [2023-08-30 05:19:28,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:19:28,442 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:19:28,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28 WrapperNode [2023-08-30 05:19:28,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:19:28,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:19:28,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:19:28,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:19:28,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,505 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2023-08-30 05:19:28,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:19:28,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:19:28,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:19:28,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:19:28,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:19:28,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:19:28,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:19:28,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:19:28,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (1/1) ... [2023-08-30 05:19:28,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:19:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:19:28,608 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 05:19:28,633 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 05:19:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:19:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:19:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:19:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:19:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:19:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:19:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:19:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:19:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:19:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:19:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:19:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:19:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:19:28,653 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 05:19:28,775 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:19:28,776 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:19:29,327 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:19:29,337 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:19:29,337 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 05:19:29,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:19:29 BoogieIcfgContainer [2023-08-30 05:19:29,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:19:29,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:19:29,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:19:29,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:19:29,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:19:28" (1/3) ... [2023-08-30 05:19:29,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ebf0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:19:29, skipping insertion in model container [2023-08-30 05:19:29,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:19:28" (2/3) ... [2023-08-30 05:19:29,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ebf0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:19:29, skipping insertion in model container [2023-08-30 05:19:29,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:19:29" (3/3) ... [2023-08-30 05:19:29,347 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-08-30 05:19:29,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:19:29,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 05:19:29,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:19:29,585 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 05:19:29,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 239 transitions, 494 flow [2023-08-30 05:19:29,717 INFO L130 PetriNetUnfolder]: 21/237 cut-off events. [2023-08-30 05:19:29,717 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:19:29,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 21/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 411 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 157. Up to 3 conditions per place. [2023-08-30 05:19:29,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 239 transitions, 494 flow [2023-08-30 05:19:29,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 233 transitions, 478 flow [2023-08-30 05:19:29,741 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:19:29,761 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 233 transitions, 478 flow [2023-08-30 05:19:29,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 233 transitions, 478 flow [2023-08-30 05:19:29,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 233 transitions, 478 flow [2023-08-30 05:19:29,829 INFO L130 PetriNetUnfolder]: 21/233 cut-off events. [2023-08-30 05:19:29,830 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:19:29,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 233 events. 21/233 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 407 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 157. Up to 3 conditions per place. [2023-08-30 05:19:29,835 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2023-08-30 05:19:50,023 INFO L134 LiptonReduction]: Checked pairs total: 7607 [2023-08-30 05:19:50,024 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-08-30 05:19:50,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:19:50,040 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;@30c8a6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:19:50,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-30 05:19:50,042 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:19:50,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:19:50,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:50,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:19:50,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:50,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 29927, now seen corresponding path program 1 times [2023-08-30 05:19:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543400063] [2023-08-30 05:19:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:50,059 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 05:19:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:50,065 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 05:19:50,069 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 05:19:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:19:50,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:50,374 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:19:50,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:19:50,412 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 05:19:50,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:50,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543400063] [2023-08-30 05:19:50,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543400063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:50,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:50,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323968296] [2023-08-30 05:19:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:50,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2023-08-30 05:19:50,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:50,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:50,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2023-08-30 05:19:50,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:51,523 INFO L130 PetriNetUnfolder]: 1793/2765 cut-off events. [2023-08-30 05:19:51,523 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-30 05:19:51,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 2765 events. 1793/2765 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 14322 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 2648. Up to 1385 conditions per place. [2023-08-30 05:19:51,541 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 91 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-08-30 05:19:51,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 95 transitions, 404 flow [2023-08-30 05:19:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-30 05:19:51,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4953519256308101 [2023-08-30 05:19:51,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-30 05:19:51,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-30 05:19:51,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:51,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-30 05:19:51,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:51,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:51,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:51,590 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 120 flow. Second operand 3 states and 746 transitions. [2023-08-30 05:19:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 95 transitions, 404 flow [2023-08-30 05:19:51,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:19:51,597 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 134 flow [2023-08-30 05:19:51,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2023-08-30 05:19:51,601 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-08-30 05:19:51,601 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 134 flow [2023-08-30 05:19:51,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:51,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:51,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:19:51,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 05:19:51,811 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 05:19:51,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:51,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 29925, now seen corresponding path program 1 times [2023-08-30 05:19:51,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:51,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996659633] [2023-08-30 05:19:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:51,813 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 05:19:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:51,818 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 05:19:51,820 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 05:19:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:19:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:51,904 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:19:51,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:19:51,921 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 05:19:51,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:51,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996659633] [2023-08-30 05:19:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996659633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:51,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:51,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465823500] [2023-08-30 05:19:51,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:51,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:52,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2023-08-30 05:19:52,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:52,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:52,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2023-08-30 05:19:52,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:52,573 INFO L130 PetriNetUnfolder]: 1793/2761 cut-off events. [2023-08-30 05:19:52,574 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:19:52,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5569 conditions, 2761 events. 1793/2761 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 14292 event pairs, 1358 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 2773. Up to 2761 conditions per place. [2023-08-30 05:19:52,586 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 49 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 05:19:52,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 230 flow [2023-08-30 05:19:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-08-30 05:19:52,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45683930942895085 [2023-08-30 05:19:52,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-08-30 05:19:52,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-08-30 05:19:52,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:52,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-08-30 05:19:52,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:52,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:52,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:52,596 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 134 flow. Second operand 3 states and 688 transitions. [2023-08-30 05:19:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 230 flow [2023-08-30 05:19:52,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:19:52,599 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 124 flow [2023-08-30 05:19:52,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=124, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-08-30 05:19:52,600 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-08-30 05:19:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 124 flow [2023-08-30 05:19:52,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:52,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:52,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:19:52,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:19:52,810 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 05:19:52,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:52,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 931320, now seen corresponding path program 1 times [2023-08-30 05:19:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350628995] [2023-08-30 05:19:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:52,813 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 05:19:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:52,814 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 05:19:52,822 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 05:19:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:19:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:52,934 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 05:19:52,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 05:19:53,021 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:19:53,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:19:53,036 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 05:19:53,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:53,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:53,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350628995] [2023-08-30 05:19:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350628995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:53,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:53,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886981980] [2023-08-30 05:19:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:53,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:53,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 502 [2023-08-30 05:19:53,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:53,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 502 [2023-08-30 05:19:53,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:53,719 INFO L130 PetriNetUnfolder]: 1345/2115 cut-off events. [2023-08-30 05:19:53,719 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:19:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 2115 events. 1345/2115 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 10736 event pairs, 1008 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 4266. Up to 2115 conditions per place. [2023-08-30 05:19:53,728 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 47 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 05:19:53,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 216 flow [2023-08-30 05:19:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-08-30 05:19:53,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46148738379814075 [2023-08-30 05:19:53,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-08-30 05:19:53,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-08-30 05:19:53,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:53,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-08-30 05:19:53,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,738 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 124 flow. Second operand 3 states and 695 transitions. [2023-08-30 05:19:53,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 216 flow [2023-08-30 05:19:53,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:19:53,740 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 121 flow [2023-08-30 05:19:53,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-30 05:19:53,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-30 05:19:53,741 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 121 flow [2023-08-30 05:19:53,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:53,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:53,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:19:53,751 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 05:19:53,950 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 05:19:53,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:53,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 931319, now seen corresponding path program 1 times [2023-08-30 05:19:53,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:53,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394879839] [2023-08-30 05:19:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:53,952 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 05:19:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:53,953 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 05:19:53,956 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 05:19:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:19:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:54,059 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:19:54,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 05:19:54,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 05:19:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:54,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:19:54,140 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 05:19:54,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:54,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:54,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394879839] [2023-08-30 05:19:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394879839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:54,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:54,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:19:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800607783] [2023-08-30 05:19:54,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:19:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:19:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:19:54,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 502 [2023-08-30 05:19:54,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:54,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:54,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 502 [2023-08-30 05:19:54,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:54,831 INFO L130 PetriNetUnfolder]: 897/1469 cut-off events. [2023-08-30 05:19:54,831 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:19:54,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1469 events. 897/1469 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7354 event pairs, 658 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 2974. Up to 1469 conditions per place. [2023-08-30 05:19:54,838 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 05:19:54,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 209 flow [2023-08-30 05:19:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-30 05:19:54,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601593625498008 [2023-08-30 05:19:54,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-30 05:19:54,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-30 05:19:54,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:54,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-30 05:19:54,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:54,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:54,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:54,848 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 121 flow. Second operand 3 states and 693 transitions. [2023-08-30 05:19:54,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 209 flow [2023-08-30 05:19:54,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:19:54,850 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 118 flow [2023-08-30 05:19:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-30 05:19:54,851 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-30 05:19:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 118 flow [2023-08-30 05:19:54,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:54,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:54,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:19:54,863 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 05:19:55,061 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 05:19:55,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:55,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 929888, now seen corresponding path program 1 times [2023-08-30 05:19:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276788347] [2023-08-30 05:19:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:55,063 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 05:19:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:55,064 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 05:19:55,069 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 05:19:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:55,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:19:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:55,179 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:19:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:19:55,228 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 05:19:55,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:19:55,407 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 05:19:55,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:55,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276788347] [2023-08-30 05:19:55,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276788347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:19:55,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:19:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:19:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740782254] [2023-08-30 05:19:55,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:19:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:19:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:19:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:19:56,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-08-30 05:19:56,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:56,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:56,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-08-30 05:19:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:57,928 INFO L130 PetriNetUnfolder]: 1349/2210 cut-off events. [2023-08-30 05:19:57,928 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 05:19:57,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4490 conditions, 2210 events. 1349/2210 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11682 event pairs, 987 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 4480. Up to 736 conditions per place. [2023-08-30 05:19:57,938 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 116 selfloop transitions, 15 changer transitions 0/131 dead transitions. [2023-08-30 05:19:57,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 131 transitions, 576 flow [2023-08-30 05:19:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:19:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:19:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1355 transitions. [2023-08-30 05:19:57,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449867197875166 [2023-08-30 05:19:57,943 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1355 transitions. [2023-08-30 05:19:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1355 transitions. [2023-08-30 05:19:57,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:57,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1355 transitions. [2023-08-30 05:19:57,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.83333333333334) internal successors, (1355), 6 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:57,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:57,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:57,954 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 118 flow. Second operand 6 states and 1355 transitions. [2023-08-30 05:19:57,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 131 transitions, 576 flow [2023-08-30 05:19:57,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 131 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:19:57,957 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 230 flow [2023-08-30 05:19:57,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-08-30 05:19:57,960 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-30 05:19:57,960 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 230 flow [2023-08-30 05:19:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:57,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:57,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:19:57,977 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 05:19:58,172 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 05:19:58,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:58,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash 895017334, now seen corresponding path program 1 times [2023-08-30 05:19:58,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:58,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864276587] [2023-08-30 05:19:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:58,173 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 05:19:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:58,178 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 05:19:58,179 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 05:19:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:19:58,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:58,292 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:19:58,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 05:19:58,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 05:19:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:19:58,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:19:58,392 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 05:19:58,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:58,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864276587] [2023-08-30 05:19:58,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864276587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:58,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:19:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300968662] [2023-08-30 05:19:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:58,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:19:58,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:58,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:19:58,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:19:58,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 502 [2023-08-30 05:19:58,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:58,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:58,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 502 [2023-08-30 05:19:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:19:59,187 INFO L130 PetriNetUnfolder]: 1277/2075 cut-off events. [2023-08-30 05:19:59,187 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 05:19:59,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2075 events. 1277/2075 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10948 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 4250. Up to 2075 conditions per place. [2023-08-30 05:19:59,197 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 05:19:59,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 336 flow [2023-08-30 05:19:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:19:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:19:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 685 transitions. [2023-08-30 05:19:59,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548472775564409 [2023-08-30 05:19:59,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 685 transitions. [2023-08-30 05:19:59,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 685 transitions. [2023-08-30 05:19:59,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:19:59,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 685 transitions. [2023-08-30 05:19:59,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:59,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:59,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:59,205 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 230 flow. Second operand 3 states and 685 transitions. [2023-08-30 05:19:59,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 336 flow [2023-08-30 05:19:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 317 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 05:19:59,208 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 209 flow [2023-08-30 05:19:59,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=209, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-30 05:19:59,208 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-30 05:19:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 209 flow [2023-08-30 05:19:59,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:59,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:19:59,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:19:59,218 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 (7)] Ended with exit code 0 [2023-08-30 05:19:59,418 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 05:19:59,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:19:59,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:19:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 895017335, now seen corresponding path program 1 times [2023-08-30 05:19:59,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:19:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354881366] [2023-08-30 05:19:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:19:59,420 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 05:19:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:19:59,422 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 05:19:59,425 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 05:19:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:19:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:19:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:19:59,516 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:19:59,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 05:19:59,546 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:19:59,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:19:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:19:59,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:19:59,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:19:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354881366] [2023-08-30 05:19:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354881366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:19:59,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:19:59,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:19:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950674258] [2023-08-30 05:19:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:19:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:19:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:19:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:19:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:19:59,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 502 [2023-08-30 05:19:59,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:19:59,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:59,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 502 [2023-08-30 05:19:59,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:00,027 INFO L130 PetriNetUnfolder]: 1205/1940 cut-off events. [2023-08-30 05:20:00,028 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 05:20:00,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1940 events. 1205/1940 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 9979 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3970. Up to 1940 conditions per place. [2023-08-30 05:20:00,042 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 05:20:00,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 311 flow [2023-08-30 05:20:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:20:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:20:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-30 05:20:00,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535192563081009 [2023-08-30 05:20:00,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-30 05:20:00,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-30 05:20:00,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:00,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-30 05:20:00,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:00,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:00,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:00,050 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 209 flow. Second operand 3 states and 683 transitions. [2023-08-30 05:20:00,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 311 flow [2023-08-30 05:20:00,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:00,054 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 206 flow [2023-08-30 05:20:00,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-08-30 05:20:00,055 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-08-30 05:20:00,055 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 206 flow [2023-08-30 05:20:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:00,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:00,056 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:20:00,067 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 05:20:00,265 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 05:20:00,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:00,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1934625575, now seen corresponding path program 2 times [2023-08-30 05:20:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:00,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291083112] [2023-08-30 05:20:00,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:20:00,266 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 05:20:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:00,268 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 05:20:00,271 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 05:20:00,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:20:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:20:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:20:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:00,409 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:20:00,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:20:00,550 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 05:20:00,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:20:01,119 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 05:20:01,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:01,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291083112] [2023-08-30 05:20:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291083112] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:20:01,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:20:01,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:20:01,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563575090] [2023-08-30 05:20:01,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:20:01,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:20:01,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:20:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:20:05,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-08-30 05:20:05,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:05,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:05,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-08-30 05:20:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:08,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:10,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:11,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:14,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:20:17,399 INFO L130 PetriNetUnfolder]: 3604/5796 cut-off events. [2023-08-30 05:20:17,400 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-30 05:20:17,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11833 conditions, 5796 events. 3604/5796 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33964 event pairs, 2619 based on Foata normal form. 11/2596 useless extension candidates. Maximal degree in co-relation 11816. Up to 882 conditions per place. [2023-08-30 05:20:17,427 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 302 selfloop transitions, 31 changer transitions 0/333 dead transitions. [2023-08-30 05:20:17,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 333 transitions, 1560 flow [2023-08-30 05:20:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:20:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:20:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2804 transitions. [2023-08-30 05:20:17,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46547144754316067 [2023-08-30 05:20:17,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2804 transitions. [2023-08-30 05:20:17,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2804 transitions. [2023-08-30 05:20:17,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:17,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2804 transitions. [2023-08-30 05:20:17,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.66666666666666) internal successors, (2804), 12 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,453 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,454 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 206 flow. Second operand 12 states and 2804 transitions. [2023-08-30 05:20:17,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 333 transitions, 1560 flow [2023-08-30 05:20:17,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 333 transitions, 1559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:17,460 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 437 flow [2023-08-30 05:20:17,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-30 05:20:17,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-30 05:20:17,462 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 437 flow [2023-08-30 05:20:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:17,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:17,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:20:17,480 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 05:20:17,677 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 05:20:17,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:17,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1975732447, now seen corresponding path program 1 times [2023-08-30 05:20:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:17,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680182864] [2023-08-30 05:20:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:17,679 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 05:20:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:17,680 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 05:20:17,682 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 05:20:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:20:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:17,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:20:17,837 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 05:20:17,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:17,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680182864] [2023-08-30 05:20:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680182864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:17,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:17,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:20:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734698724] [2023-08-30 05:20:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:18,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-08-30 05:20:18,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:18,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:18,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-08-30 05:20:18,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:19,733 INFO L130 PetriNetUnfolder]: 6592/10656 cut-off events. [2023-08-30 05:20:19,733 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-08-30 05:20:19,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21736 conditions, 10656 events. 6592/10656 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72025 event pairs, 2619 based on Foata normal form. 0/4751 useless extension candidates. Maximal degree in co-relation 21711. Up to 5761 conditions per place. [2023-08-30 05:20:19,791 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 82 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2023-08-30 05:20:19,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 694 flow [2023-08-30 05:20:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1113 transitions. [2023-08-30 05:20:19,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434262948207171 [2023-08-30 05:20:19,795 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1113 transitions. [2023-08-30 05:20:19,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1113 transitions. [2023-08-30 05:20:19,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:19,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1113 transitions. [2023-08-30 05:20:19,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:19,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:19,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:19,803 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 437 flow. Second operand 5 states and 1113 transitions. [2023-08-30 05:20:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 694 flow [2023-08-30 05:20:19,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 633 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 05:20:19,808 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 418 flow [2023-08-30 05:20:19,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=418, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-08-30 05:20:19,810 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-30 05:20:19,810 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 418 flow [2023-08-30 05:20:19,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:19,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:19,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:20:19,822 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 05:20:20,020 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 05:20:20,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:20,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1975732397, now seen corresponding path program 1 times [2023-08-30 05:20:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38938085] [2023-08-30 05:20:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:20,021 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 05:20:20,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:20,023 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 05:20:20,058 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 05:20:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:20:20,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:20,150 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 05:20:20,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:20,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38938085] [2023-08-30 05:20:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38938085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:20,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:20,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:20:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798833676] [2023-08-30 05:20:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:20,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-08-30 05:20:20,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 418 flow. Second operand has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 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 05:20:20,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:20,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-08-30 05:20:20,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:21,812 INFO L130 PetriNetUnfolder]: 7646/12594 cut-off events. [2023-08-30 05:20:21,813 INFO L131 PetriNetUnfolder]: For 1409/1409 co-relation queries the response was YES. [2023-08-30 05:20:21,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26570 conditions, 12594 events. 7646/12594 cut-off events. For 1409/1409 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86959 event pairs, 5346 based on Foata normal form. 0/6618 useless extension candidates. Maximal degree in co-relation 26544. Up to 10655 conditions per place. [2023-08-30 05:20:21,882 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 117 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-30 05:20:21,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 121 transitions, 865 flow [2023-08-30 05:20:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1132 transitions. [2023-08-30 05:20:21,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450996015936255 [2023-08-30 05:20:21,887 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1132 transitions. [2023-08-30 05:20:21,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1132 transitions. [2023-08-30 05:20:21,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:21,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1132 transitions. [2023-08-30 05:20:21,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.4) internal successors, (1132), 5 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:21,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:21,906 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:21,906 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 418 flow. Second operand 5 states and 1132 transitions. [2023-08-30 05:20:21,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 121 transitions, 865 flow [2023-08-30 05:20:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 824 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:20:21,913 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 411 flow [2023-08-30 05:20:21,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-30 05:20:21,915 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-30 05:20:21,915 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 411 flow [2023-08-30 05:20:21,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 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 05:20:21,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:21,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:21,929 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 05:20:22,128 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 05:20:22,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:22,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -115040346, now seen corresponding path program 1 times [2023-08-30 05:20:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:22,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099283376] [2023-08-30 05:20:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:22,130 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 05:20:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:22,131 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 05:20:22,134 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 05:20:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:20:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:22,270 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 05:20:22,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:22,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099283376] [2023-08-30 05:20:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099283376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:20:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514669092] [2023-08-30 05:20:22,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:22,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-08-30 05:20:22,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:22,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:22,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-08-30 05:20:22,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:23,904 INFO L130 PetriNetUnfolder]: 7032/11628 cut-off events. [2023-08-30 05:20:23,904 INFO L131 PetriNetUnfolder]: For 1980/1980 co-relation queries the response was YES. [2023-08-30 05:20:23,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25854 conditions, 11628 events. 7032/11628 cut-off events. For 1980/1980 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 79949 event pairs, 5262 based on Foata normal form. 16/6444 useless extension candidates. Maximal degree in co-relation 25825. Up to 11190 conditions per place. [2023-08-30 05:20:23,963 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 94 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2023-08-30 05:20:23,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 722 flow [2023-08-30 05:20:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2023-08-30 05:20:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449800796812749 [2023-08-30 05:20:23,967 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2023-08-30 05:20:23,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2023-08-30 05:20:23,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:23,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2023-08-30 05:20:23,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,973 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 411 flow. Second operand 5 states and 1129 transitions. [2023-08-30 05:20:23,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 722 flow [2023-08-30 05:20:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 716 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 05:20:23,983 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 487 flow [2023-08-30 05:20:23,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=487, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-08-30 05:20:23,983 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-08-30 05:20:23,984 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 487 flow [2023-08-30 05:20:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:23,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:23,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:23,993 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 05:20:24,193 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 05:20:24,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:24,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 723796991, now seen corresponding path program 1 times [2023-08-30 05:20:24,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:24,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960683396] [2023-08-30 05:20:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:24,194 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 05:20:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:24,195 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 05:20:24,195 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 05:20:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:20:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:24,333 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:20:24,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:20:24,359 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:20:24,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:20:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:20:24,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:24,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960683396] [2023-08-30 05:20:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960683396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:24,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:20:24,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440164552] [2023-08-30 05:20:24,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:24,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:24,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:24,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-08-30 05:20:24,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:24,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:24,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-08-30 05:20:24,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:25,447 INFO L130 PetriNetUnfolder]: 5484/9064 cut-off events. [2023-08-30 05:20:25,447 INFO L131 PetriNetUnfolder]: For 2869/2869 co-relation queries the response was YES. [2023-08-30 05:20:25,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21179 conditions, 9064 events. 5484/9064 cut-off events. For 2869/2869 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59391 event pairs, 4014 based on Foata normal form. 0/5424 useless extension candidates. Maximal degree in co-relation 21147. Up to 9051 conditions per place. [2023-08-30 05:20:25,493 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 61 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-30 05:20:25,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 623 flow [2023-08-30 05:20:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:20:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:20:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 851 transitions. [2023-08-30 05:20:25,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42380478087649404 [2023-08-30 05:20:25,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 851 transitions. [2023-08-30 05:20:25,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 851 transitions. [2023-08-30 05:20:25,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:25,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 851 transitions. [2023-08-30 05:20:25,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:25,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:25,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:25,523 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 487 flow. Second operand 4 states and 851 transitions. [2023-08-30 05:20:25,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 623 flow [2023-08-30 05:20:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 592 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 05:20:25,536 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 470 flow [2023-08-30 05:20:25,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-08-30 05:20:25,537 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-08-30 05:20:25,537 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 470 flow [2023-08-30 05:20:25,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:25,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:25,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:25,548 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 05:20:25,747 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 05:20:25,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:25,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash 723796992, now seen corresponding path program 1 times [2023-08-30 05:20:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716165741] [2023-08-30 05:20:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:25,748 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 05:20:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:25,749 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 05:20:25,750 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 05:20:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:20:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:25,905 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:20:25,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:20:26,009 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 05:20:26,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-08-30 05:20:26,329 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 05:20:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:20:27,096 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 05:20:27,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:27,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716165741] [2023-08-30 05:20:27,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716165741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:20:27,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:20:27,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 05:20:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967776510] [2023-08-30 05:20:27,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:20:27,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:20:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:20:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:20:32,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 502 [2023-08-30 05:20:32,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 470 flow. Second operand has 14 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:32,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:32,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 502 [2023-08-30 05:20:32,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:43,622 INFO L130 PetriNetUnfolder]: 10288/17193 cut-off events. [2023-08-30 05:20:43,622 INFO L131 PetriNetUnfolder]: For 4568/4568 co-relation queries the response was YES. [2023-08-30 05:20:43,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39802 conditions, 17193 events. 10288/17193 cut-off events. For 4568/4568 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 126912 event pairs, 2554 based on Foata normal form. 0/10533 useless extension candidates. Maximal degree in co-relation 39770. Up to 3230 conditions per place. [2023-08-30 05:20:43,708 INFO L137 encePairwiseOnDemand]: 487/502 looper letters, 378 selfloop transitions, 80 changer transitions 0/458 dead transitions. [2023-08-30 05:20:43,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 458 transitions, 2547 flow [2023-08-30 05:20:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 05:20:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 05:20:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6166 transitions. [2023-08-30 05:20:43,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094289508632138 [2023-08-30 05:20:43,724 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6166 transitions. [2023-08-30 05:20:43,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6166 transitions. [2023-08-30 05:20:43,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:43,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6166 transitions. [2023-08-30 05:20:43,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.53333333333333) internal successors, (6166), 30 states have internal predecessors, (6166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:43,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 502.0) internal successors, (15562), 31 states have internal predecessors, (15562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:43,761 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 502.0) internal successors, (15562), 31 states have internal predecessors, (15562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:43,762 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 470 flow. Second operand 30 states and 6166 transitions. [2023-08-30 05:20:43,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 458 transitions, 2547 flow [2023-08-30 05:20:43,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 458 transitions, 2534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:20:43,785 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1056 flow [2023-08-30 05:20:43,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1056, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2023-08-30 05:20:43,786 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-08-30 05:20:43,787 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1056 flow [2023-08-30 05:20:43,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:43,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:43,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:43,801 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 05:20:43,997 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 05:20:43,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:43,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 723797042, now seen corresponding path program 1 times [2023-08-30 05:20:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:43,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584300762] [2023-08-30 05:20:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:43,999 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 05:20:43,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:44,000 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 05:20:44,003 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 05:20:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:44,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:20:44,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:44,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:20:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:20:44,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:44,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584300762] [2023-08-30 05:20:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584300762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:44,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:44,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:20:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866403659] [2023-08-30 05:20:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:44,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:20:44,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:20:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:20:44,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-08-30 05:20:44,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1056 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:44,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:44,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-08-30 05:20:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:45,556 INFO L130 PetriNetUnfolder]: 7584/12693 cut-off events. [2023-08-30 05:20:45,556 INFO L131 PetriNetUnfolder]: For 9703/9703 co-relation queries the response was YES. [2023-08-30 05:20:45,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32845 conditions, 12693 events. 7584/12693 cut-off events. For 9703/9703 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87807 event pairs, 5394 based on Foata normal form. 0/9771 useless extension candidates. Maximal degree in co-relation 32806. Up to 12634 conditions per place. [2023-08-30 05:20:45,634 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 106 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2023-08-30 05:20:45,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 120 transitions, 1201 flow [2023-08-30 05:20:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:20:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:20:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-08-30 05:20:45,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218127490039841 [2023-08-30 05:20:45,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-08-30 05:20:45,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-08-30 05:20:45,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:45,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-08-30 05:20:45,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:45,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:45,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:45,643 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1056 flow. Second operand 4 states and 847 transitions. [2023-08-30 05:20:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 120 transitions, 1201 flow [2023-08-30 05:20:45,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 120 transitions, 1033 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-08-30 05:20:45,722 INFO L231 Difference]: Finished difference. Result has 103 places, 120 transitions, 821 flow [2023-08-30 05:20:45,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=103, PETRI_TRANSITIONS=120} [2023-08-30 05:20:45,723 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-08-30 05:20:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 120 transitions, 821 flow [2023-08-30 05:20:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:45,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:45,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 05:20:45,935 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 05:20:45,936 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:45,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 305038210, now seen corresponding path program 1 times [2023-08-30 05:20:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867626124] [2023-08-30 05:20:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:45,937 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 05:20:45,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:45,938 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 05:20:45,938 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 05:20:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:20:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:46,073 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 05:20:46,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:46,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867626124] [2023-08-30 05:20:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867626124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:46,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:46,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:20:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538251581] [2023-08-30 05:20:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:46,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-08-30 05:20:46,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 120 transitions, 821 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:46,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:46,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-08-30 05:20:46,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:47,514 INFO L130 PetriNetUnfolder]: 7242/12279 cut-off events. [2023-08-30 05:20:47,515 INFO L131 PetriNetUnfolder]: For 8250/8250 co-relation queries the response was YES. [2023-08-30 05:20:47,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31212 conditions, 12279 events. 7242/12279 cut-off events. For 8250/8250 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 86233 event pairs, 5016 based on Foata normal form. 108/9681 useless extension candidates. Maximal degree in co-relation 31176. Up to 11222 conditions per place. [2023-08-30 05:20:47,576 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 155 selfloop transitions, 4 changer transitions 0/159 dead transitions. [2023-08-30 05:20:47,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1342 flow [2023-08-30 05:20:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1112 transitions. [2023-08-30 05:20:47,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44302788844621516 [2023-08-30 05:20:47,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1112 transitions. [2023-08-30 05:20:47,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1112 transitions. [2023-08-30 05:20:47,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:47,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1112 transitions. [2023-08-30 05:20:47,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:47,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:47,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:47,585 INFO L175 Difference]: Start difference. First operand has 103 places, 120 transitions, 821 flow. Second operand 5 states and 1112 transitions. [2023-08-30 05:20:47,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1342 flow [2023-08-30 05:20:47,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:20:47,642 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 827 flow [2023-08-30 05:20:47,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=827, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2023-08-30 05:20:47,643 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2023-08-30 05:20:47,643 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 827 flow [2023-08-30 05:20:47,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:47,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:47,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:47,660 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 05:20:47,860 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 05:20:47,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:47,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1117126715, now seen corresponding path program 1 times [2023-08-30 05:20:47,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:47,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476320912] [2023-08-30 05:20:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:47,862 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 05:20:47,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:47,862 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 05:20:47,863 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 05:20:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:20:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:47,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:20:48,084 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 05:20:48,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:48,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476320912] [2023-08-30 05:20:48,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476320912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:48,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:48,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:20:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892295034] [2023-08-30 05:20:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:48,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-08-30 05:20:48,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 827 flow. Second operand has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:48,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:48,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-08-30 05:20:48,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:49,906 INFO L130 PetriNetUnfolder]: 7114/12081 cut-off events. [2023-08-30 05:20:49,907 INFO L131 PetriNetUnfolder]: For 11250/11250 co-relation queries the response was YES. [2023-08-30 05:20:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33766 conditions, 12081 events. 7114/12081 cut-off events. For 11250/11250 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 85166 event pairs, 5082 based on Foata normal form. 24/11001 useless extension candidates. Maximal degree in co-relation 33728. Up to 11669 conditions per place. [2023-08-30 05:20:49,969 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 124 selfloop transitions, 19 changer transitions 0/143 dead transitions. [2023-08-30 05:20:49,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1178 flow [2023-08-30 05:20:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1076 transitions. [2023-08-30 05:20:49,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42868525896414345 [2023-08-30 05:20:49,972 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1076 transitions. [2023-08-30 05:20:49,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1076 transitions. [2023-08-30 05:20:49,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:49,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1076 transitions. [2023-08-30 05:20:49,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:49,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:49,979 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:49,979 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 827 flow. Second operand 5 states and 1076 transitions. [2023-08-30 05:20:49,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1178 flow [2023-08-30 05:20:50,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1169 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:20:50,041 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 865 flow [2023-08-30 05:20:50,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2023-08-30 05:20:50,042 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2023-08-30 05:20:50,042 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 865 flow [2023-08-30 05:20:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:50,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:50,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:50,049 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 05:20:50,243 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 05:20:50,243 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:50,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1117126593, now seen corresponding path program 1 times [2023-08-30 05:20:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:50,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678108359] [2023-08-30 05:20:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:50,244 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 05:20:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:50,245 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 05:20:50,248 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 05:20:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:20:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:50,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:20:50,396 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 05:20:50,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:50,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678108359] [2023-08-30 05:20:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678108359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:20:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152966507] [2023-08-30 05:20:50,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:50,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-08-30 05:20:50,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 865 flow. Second operand has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:50,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:50,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-08-30 05:20:50,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:52,663 INFO L130 PetriNetUnfolder]: 10188/17331 cut-off events. [2023-08-30 05:20:52,663 INFO L131 PetriNetUnfolder]: For 25742/25742 co-relation queries the response was YES. [2023-08-30 05:20:52,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52299 conditions, 17331 events. 10188/17331 cut-off events. For 25742/25742 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 133169 event pairs, 4858 based on Foata normal form. 718/17435 useless extension candidates. Maximal degree in co-relation 52260. Up to 11354 conditions per place. [2023-08-30 05:20:52,803 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 149 selfloop transitions, 29 changer transitions 0/178 dead transitions. [2023-08-30 05:20:52,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 178 transitions, 1566 flow [2023-08-30 05:20:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1097 transitions. [2023-08-30 05:20:52,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370517928286853 [2023-08-30 05:20:52,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1097 transitions. [2023-08-30 05:20:52,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1097 transitions. [2023-08-30 05:20:52,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:52,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1097 transitions. [2023-08-30 05:20:52,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:52,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:52,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:52,813 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 865 flow. Second operand 5 states and 1097 transitions. [2023-08-30 05:20:52,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 178 transitions, 1566 flow [2023-08-30 05:20:52,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 178 transitions, 1534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:20:52,894 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 908 flow [2023-08-30 05:20:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2023-08-30 05:20:52,895 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-08-30 05:20:52,895 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 908 flow [2023-08-30 05:20:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:52,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:52,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:52,905 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 (18)] Ended with exit code 0 [2023-08-30 05:20:53,104 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 05:20:53,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:53,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 362890542, now seen corresponding path program 2 times [2023-08-30 05:20:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012499161] [2023-08-30 05:20:53,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:20:53,105 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 05:20:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:53,106 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 05:20:53,108 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 05:20:53,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:20:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:20:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:20:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:53,231 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:20:53,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:20:53,293 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:20:53,294 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:20:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:53,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:20:53,360 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:20:53,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:20:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:20:53,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:20:53,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:20:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012499161] [2023-08-30 05:20:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012499161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:20:53,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:20:53,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:20:53,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476615837] [2023-08-30 05:20:53,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:20:53,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:20:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:20:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:20:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:20:53,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-08-30 05:20:53,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 908 flow. Second operand has 5 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:53,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:20:53,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-08-30 05:20:53,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:55,683 INFO L130 PetriNetUnfolder]: 9964/16963 cut-off events. [2023-08-30 05:20:55,683 INFO L131 PetriNetUnfolder]: For 38034/38034 co-relation queries the response was YES. [2023-08-30 05:20:55,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54033 conditions, 16963 events. 9964/16963 cut-off events. For 38034/38034 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 127861 event pairs, 4498 based on Foata normal form. 144/16495 useless extension candidates. Maximal degree in co-relation 53994. Up to 10096 conditions per place. [2023-08-30 05:20:55,788 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 118 selfloop transitions, 29 changer transitions 0/147 dead transitions. [2023-08-30 05:20:55,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 147 transitions, 1334 flow [2023-08-30 05:20:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:20:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:20:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-08-30 05:20:55,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294820717131474 [2023-08-30 05:20:55,791 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-08-30 05:20:55,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-08-30 05:20:55,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:20:55,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-08-30 05:20:55,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:55,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:55,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:55,794 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 908 flow. Second operand 5 states and 1078 transitions. [2023-08-30 05:20:55,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 147 transitions, 1334 flow [2023-08-30 05:20:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1276 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:20:55,878 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 932 flow [2023-08-30 05:20:55,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=932, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2023-08-30 05:20:55,879 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2023-08-30 05:20:55,879 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 932 flow [2023-08-30 05:20:55,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:20:55,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:20:55,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:20:55,891 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 05:20:56,088 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 05:20:56,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:20:56,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:20:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -214044076, now seen corresponding path program 1 times [2023-08-30 05:20:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:20:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015502849] [2023-08-30 05:20:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:20:56,089 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 05:20:56,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:20:56,090 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 05:20:56,092 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 05:20:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:20:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:20:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:20:56,288 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:20:56,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:20:56,326 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:20:56,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:20:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:20:56,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:20:56,414 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:20:56,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:20:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:20:56,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:21:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:00,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:00,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015502849] [2023-08-30 05:21:00,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015502849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:21:00,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:21:00,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:21:00,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080782154] [2023-08-30 05:21:00,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:21:00,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:21:00,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:21:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:21:04,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 502 [2023-08-30 05:21:04,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 932 flow. Second operand has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:04,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:04,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 502 [2023-08-30 05:21:04,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:17,151 INFO L130 PetriNetUnfolder]: 13035/22181 cut-off events. [2023-08-30 05:21:17,151 INFO L131 PetriNetUnfolder]: For 47943/47943 co-relation queries the response was YES. [2023-08-30 05:21:17,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71604 conditions, 22181 events. 13035/22181 cut-off events. For 47943/47943 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 172291 event pairs, 8341 based on Foata normal form. 636/22015 useless extension candidates. Maximal degree in co-relation 71563. Up to 5352 conditions per place. [2023-08-30 05:21:17,347 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 446 selfloop transitions, 54 changer transitions 0/500 dead transitions. [2023-08-30 05:21:17,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 500 transitions, 3658 flow [2023-08-30 05:21:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 05:21:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 05:21:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5599 transitions. [2023-08-30 05:21:17,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41308838719197283 [2023-08-30 05:21:17,354 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5599 transitions. [2023-08-30 05:21:17,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5599 transitions. [2023-08-30 05:21:17,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:17,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5599 transitions. [2023-08-30 05:21:17,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 207.37037037037038) internal successors, (5599), 27 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:17,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 502.0) internal successors, (14056), 28 states have internal predecessors, (14056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:17,373 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 502.0) internal successors, (14056), 28 states have internal predecessors, (14056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:17,373 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 932 flow. Second operand 27 states and 5599 transitions. [2023-08-30 05:21:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 500 transitions, 3658 flow [2023-08-30 05:21:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 500 transitions, 3522 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-30 05:21:17,539 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1234 flow [2023-08-30 05:21:17,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1234, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2023-08-30 05:21:17,540 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2023-08-30 05:21:17,540 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1234 flow [2023-08-30 05:21:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:17,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:17,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:17,548 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 05:21:17,741 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 05:21:17,741 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:21:17,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash -215718893, now seen corresponding path program 1 times [2023-08-30 05:21:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587448596] [2023-08-30 05:21:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:17,743 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 05:21:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:17,744 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 05:21:17,744 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 05:21:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:21:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:17,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:21:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:18,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587448596] [2023-08-30 05:21:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587448596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:21:18,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:21:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:21:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766396623] [2023-08-30 05:21:18,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:21:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:21:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:21:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:21:18,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 502 [2023-08-30 05:21:18,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1234 flow. Second operand has 12 states, 12 states have (on average 207.66666666666666) internal successors, (2492), 12 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:18,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:18,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 502 [2023-08-30 05:21:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:21,725 INFO L130 PetriNetUnfolder]: 11579/19957 cut-off events. [2023-08-30 05:21:21,726 INFO L131 PetriNetUnfolder]: For 63491/63491 co-relation queries the response was YES. [2023-08-30 05:21:21,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72357 conditions, 19957 events. 11579/19957 cut-off events. For 63491/63491 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 155937 event pairs, 7287 based on Foata normal form. 384/19669 useless extension candidates. Maximal degree in co-relation 72311. Up to 14615 conditions per place. [2023-08-30 05:21:21,878 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 214 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2023-08-30 05:21:21,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 2283 flow [2023-08-30 05:21:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 05:21:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 05:21:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2385 transitions. [2023-08-30 05:21:21,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43190872872147773 [2023-08-30 05:21:21,881 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2385 transitions. [2023-08-30 05:21:21,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2385 transitions. [2023-08-30 05:21:21,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:21,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2385 transitions. [2023-08-30 05:21:21,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.8181818181818) internal successors, (2385), 11 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:21,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:21,887 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:21,887 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1234 flow. Second operand 11 states and 2385 transitions. [2023-08-30 05:21:21,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 2283 flow [2023-08-30 05:21:22,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 242 transitions, 2112 flow, removed 65 selfloop flow, removed 7 redundant places. [2023-08-30 05:21:22,563 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 1258 flow [2023-08-30 05:21:22,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1258, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2023-08-30 05:21:22,563 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2023-08-30 05:21:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 1258 flow [2023-08-30 05:21:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.66666666666666) internal successors, (2492), 12 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:22,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:22,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:22,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:21:22,773 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 05:21:22,774 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:21:22,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -215721888, now seen corresponding path program 1 times [2023-08-30 05:21:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:22,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157694023] [2023-08-30 05:21:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:22,774 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 05:21:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:22,775 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 05:21:22,777 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 05:21:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:21:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 05:21:22,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:21:22,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:22,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157694023] [2023-08-30 05:21:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157694023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:21:22,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:21:22,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:21:22,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985729119] [2023-08-30 05:21:22,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:21:22,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:21:22,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:21:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:21:23,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 502 [2023-08-30 05:21:23,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 208.66666666666666) internal successors, (1252), 6 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:23,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:23,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 502 [2023-08-30 05:21:23,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:25,810 INFO L130 PetriNetUnfolder]: 12360/21362 cut-off events. [2023-08-30 05:21:25,810 INFO L131 PetriNetUnfolder]: For 72625/72625 co-relation queries the response was YES. [2023-08-30 05:21:25,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75550 conditions, 21362 events. 12360/21362 cut-off events. For 72625/72625 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 170248 event pairs, 4756 based on Foata normal form. 0/21090 useless extension candidates. Maximal degree in co-relation 75502. Up to 11088 conditions per place. [2023-08-30 05:21:25,945 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 196 selfloop transitions, 38 changer transitions 0/234 dead transitions. [2023-08-30 05:21:25,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 234 transitions, 2325 flow [2023-08-30 05:21:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:21:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:21:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1104 transitions. [2023-08-30 05:21:25,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398406374501992 [2023-08-30 05:21:25,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1104 transitions. [2023-08-30 05:21:25,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1104 transitions. [2023-08-30 05:21:25,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:25,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1104 transitions. [2023-08-30 05:21:25,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.8) internal successors, (1104), 5 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:25,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:25,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:25,950 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 1258 flow. Second operand 5 states and 1104 transitions. [2023-08-30 05:21:25,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 234 transitions, 2325 flow [2023-08-30 05:21:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 234 transitions, 2305 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:21:26,352 INFO L231 Difference]: Finished difference. Result has 148 places, 165 transitions, 1556 flow [2023-08-30 05:21:26,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1556, PETRI_PLACES=148, PETRI_TRANSITIONS=165} [2023-08-30 05:21:26,353 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2023-08-30 05:21:26,353 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 165 transitions, 1556 flow [2023-08-30 05:21:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.66666666666666) internal successors, (1252), 6 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:26,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:26,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:26,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 05:21:26,563 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 05:21:26,564 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:21:26,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash 462089828, now seen corresponding path program 1 times [2023-08-30 05:21:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:26,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887003872] [2023-08-30 05:21:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:21:26,565 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 05:21:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:26,566 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 05:21:26,567 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 05:21:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:21:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:21:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:26,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:21:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:26,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:26,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887003872] [2023-08-30 05:21:26,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887003872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:21:26,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:21:26,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:21:26,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364869870] [2023-08-30 05:21:26,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:21:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:21:26,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:21:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:21:27,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 502 [2023-08-30 05:21:27,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 165 transitions, 1556 flow. Second operand has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:27,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:27,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 502 [2023-08-30 05:21:27,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:21:30,656 INFO L130 PetriNetUnfolder]: 11432/20210 cut-off events. [2023-08-30 05:21:30,656 INFO L131 PetriNetUnfolder]: For 78955/78955 co-relation queries the response was YES. [2023-08-30 05:21:30,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75563 conditions, 20210 events. 11432/20210 cut-off events. For 78955/78955 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 163604 event pairs, 7544 based on Foata normal form. 768/20978 useless extension candidates. Maximal degree in co-relation 75512. Up to 15428 conditions per place. [2023-08-30 05:21:30,841 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 227 selfloop transitions, 31 changer transitions 0/258 dead transitions. [2023-08-30 05:21:30,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 258 transitions, 2549 flow [2023-08-30 05:21:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 05:21:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 05:21:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2380 transitions. [2023-08-30 05:21:30,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43100325968851866 [2023-08-30 05:21:30,846 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2380 transitions. [2023-08-30 05:21:30,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2380 transitions. [2023-08-30 05:21:30,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:21:30,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2380 transitions. [2023-08-30 05:21:30,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.36363636363637) internal successors, (2380), 11 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:30,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:30,853 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:30,853 INFO L175 Difference]: Start difference. First operand has 148 places, 165 transitions, 1556 flow. Second operand 11 states and 2380 transitions. [2023-08-30 05:21:30,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 258 transitions, 2549 flow [2023-08-30 05:21:31,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 2467 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:21:31,619 INFO L231 Difference]: Finished difference. Result has 156 places, 165 transitions, 1582 flow [2023-08-30 05:21:31,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1582, PETRI_PLACES=156, PETRI_TRANSITIONS=165} [2023-08-30 05:21:31,620 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 102 predicate places. [2023-08-30 05:21:31,620 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 165 transitions, 1582 flow [2023-08-30 05:21:31,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:21:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:21:31,628 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 05:21:31,822 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 05:21:31,822 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:21:31,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:21:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1482713460, now seen corresponding path program 2 times [2023-08-30 05:21:31,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:21:31,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832767573] [2023-08-30 05:21:31,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:21:31,823 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 05:21:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:21:31,824 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 05:21:31,824 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 05:21:31,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:21:31,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:21:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:21:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:21:32,014 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:21:32,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:21:32,061 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:21:32,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:21:32,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:21:32,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:21:32,129 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:21:32,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:21:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:32,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:21:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:21:32,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:21:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832767573] [2023-08-30 05:21:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832767573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:21:32,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:21:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 05:21:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684795379] [2023-08-30 05:21:32,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:21:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:21:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:21:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:21:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:21:36,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:38,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:40,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:43,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:46,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:48,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:51,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:21:54,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 502 [2023-08-30 05:21:54,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 165 transitions, 1582 flow. Second operand has 14 states, 14 states have (on average 191.57142857142858) internal successors, (2682), 14 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:21:54,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:21:54,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 502 [2023-08-30 05:21:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:01,016 INFO L130 PetriNetUnfolder]: 15384/27026 cut-off events. [2023-08-30 05:22:01,016 INFO L131 PetriNetUnfolder]: For 145399/145399 co-relation queries the response was YES. [2023-08-30 05:22:01,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104155 conditions, 27026 events. 15384/27026 cut-off events. For 145399/145399 co-relation queries the response was YES. Maximal size of possible extension queue 1073. Compared 225095 event pairs, 3424 based on Foata normal form. 272/27298 useless extension candidates. Maximal degree in co-relation 104103. Up to 6006 conditions per place. [2023-08-30 05:22:01,244 INFO L137 encePairwiseOnDemand]: 493/502 looper letters, 376 selfloop transitions, 59 changer transitions 0/435 dead transitions. [2023-08-30 05:22:01,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 435 transitions, 3929 flow [2023-08-30 05:22:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 05:22:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 05:22:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3510 transitions. [2023-08-30 05:22:01,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112959925005859 [2023-08-30 05:22:01,248 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3510 transitions. [2023-08-30 05:22:01,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3510 transitions. [2023-08-30 05:22:01,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:22:01,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3510 transitions. [2023-08-30 05:22:01,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 206.47058823529412) internal successors, (3510), 17 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:01,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 502.0) internal successors, (9036), 18 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:01,255 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 502.0) internal successors, (9036), 18 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:01,256 INFO L175 Difference]: Start difference. First operand has 156 places, 165 transitions, 1582 flow. Second operand 17 states and 3510 transitions. [2023-08-30 05:22:01,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 435 transitions, 3929 flow [2023-08-30 05:22:02,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 435 transitions, 3884 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 05:22:02,051 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1818 flow [2023-08-30 05:22:02,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1818, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2023-08-30 05:22:02,051 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2023-08-30 05:22:02,051 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1818 flow [2023-08-30 05:22:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 191.57142857142858) internal successors, (2682), 14 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:02,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:22:02,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:22:02,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 05:22:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:22:02,253 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:22:02,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:22:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1482713411, now seen corresponding path program 1 times [2023-08-30 05:22:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:22:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066757514] [2023-08-30 05:22:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:22:02,254 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 05:22:02,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:22:02,255 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:22:02,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 05:22:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:22:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:22:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:22:02,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:22:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:22:02,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:22:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:22:02,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:22:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066757514] [2023-08-30 05:22:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066757514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:22:02,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:22:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 05:22:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61941696] [2023-08-30 05:22:02,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:22:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:22:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:22:02,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:22:02,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:22:06,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 502 [2023-08-30 05:22:06,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1818 flow. Second operand has 12 states, 12 states have (on average 203.5) internal successors, (2442), 12 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:06,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:22:06,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 502 [2023-08-30 05:22:06,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:12,859 INFO L130 PetriNetUnfolder]: 21136/36682 cut-off events. [2023-08-30 05:22:12,860 INFO L131 PetriNetUnfolder]: For 220441/220441 co-relation queries the response was YES. [2023-08-30 05:22:13,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150626 conditions, 36682 events. 21136/36682 cut-off events. For 220441/220441 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 308938 event pairs, 2628 based on Foata normal form. 816/37498 useless extension candidates. Maximal degree in co-relation 150570. Up to 7433 conditions per place. [2023-08-30 05:22:13,402 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 284 selfloop transitions, 99 changer transitions 0/383 dead transitions. [2023-08-30 05:22:13,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 383 transitions, 4227 flow [2023-08-30 05:22:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:22:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:22:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2157 transitions. [2023-08-30 05:22:13,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296812749003984 [2023-08-30 05:22:13,406 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2157 transitions. [2023-08-30 05:22:13,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2157 transitions. [2023-08-30 05:22:13,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:22:13,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2157 transitions. [2023-08-30 05:22:13,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 215.7) internal successors, (2157), 10 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:13,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 502.0) internal successors, (5522), 11 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:13,412 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 502.0) internal successors, (5522), 11 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:13,412 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1818 flow. Second operand 10 states and 2157 transitions. [2023-08-30 05:22:13,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 383 transitions, 4227 flow [2023-08-30 05:22:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 383 transitions, 4139 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-08-30 05:22:14,541 INFO L231 Difference]: Finished difference. Result has 181 places, 211 transitions, 2479 flow [2023-08-30 05:22:14,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2479, PETRI_PLACES=181, PETRI_TRANSITIONS=211} [2023-08-30 05:22:14,542 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-08-30 05:22:14,542 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 211 transitions, 2479 flow [2023-08-30 05:22:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 203.5) internal successors, (2442), 12 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:14,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:22:14,542 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 1, 1, 1] [2023-08-30 05:22:14,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:22:14,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:22:14,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:22:14,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:22:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1709805604, now seen corresponding path program 1 times [2023-08-30 05:22:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:22:14,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682914262] [2023-08-30 05:22:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:22:14,743 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 05:22:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:22:14,745 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:22:14,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:22:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:22:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:22:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:22:14,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:22:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:22:15,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:22:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:22:17,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:22:17,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682914262] [2023-08-30 05:22:17,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682914262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:22:17,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:22:17,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-08-30 05:22:17,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646963803] [2023-08-30 05:22:17,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:22:17,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 05:22:17,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:22:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 05:22:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2023-08-30 05:22:34,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-08-30 05:22:34,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 211 transitions, 2479 flow. Second operand has 22 states, 22 states have (on average 204.04545454545453) internal successors, (4489), 22 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:22:34,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:22:34,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-08-30 05:22:34,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:22:40,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:41,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:43,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:45,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:46,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:48,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:49,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:50,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:52,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:56,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:22:58,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:00,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:02,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:03,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:06,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:08,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:12,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:13,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:16,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:18,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:21,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:22,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:23,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:27,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:29,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:32,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:35,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:23:53,511 INFO L130 PetriNetUnfolder]: 47310/81973 cut-off events. [2023-08-30 05:23:53,512 INFO L131 PetriNetUnfolder]: For 525312/525312 co-relation queries the response was YES. [2023-08-30 05:23:54,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361152 conditions, 81973 events. 47310/81973 cut-off events. For 525312/525312 co-relation queries the response was YES. Maximal size of possible extension queue 1934. Compared 740206 event pairs, 37156 based on Foata normal form. 51/82024 useless extension candidates. Maximal degree in co-relation 361094. Up to 16733 conditions per place. [2023-08-30 05:23:54,829 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 1215 selfloop transitions, 79 changer transitions 0/1294 dead transitions. [2023-08-30 05:23:54,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1294 transitions, 16903 flow [2023-08-30 05:23:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 05:23:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 05:23:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 6459 transitions. [2023-08-30 05:23:54,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436735815359253 [2023-08-30 05:23:54,838 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 6459 transitions. [2023-08-30 05:23:54,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 6459 transitions. [2023-08-30 05:23:54,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:23:54,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 6459 transitions. [2023-08-30 05:23:54,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 222.72413793103448) internal successors, (6459), 29 states have internal predecessors, (6459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:23:54,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:23:54,857 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:23:54,858 INFO L175 Difference]: Start difference. First operand has 181 places, 211 transitions, 2479 flow. Second operand 29 states and 6459 transitions. [2023-08-30 05:23:54,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1294 transitions, 16903 flow [2023-08-30 05:24:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1294 transitions, 16181 flow, removed 252 selfloop flow, removed 3 redundant places. [2023-08-30 05:24:07,345 INFO L231 Difference]: Finished difference. Result has 222 places, 250 transitions, 3104 flow [2023-08-30 05:24:07,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3104, PETRI_PLACES=222, PETRI_TRANSITIONS=250} [2023-08-30 05:24:07,346 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2023-08-30 05:24:07,346 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 250 transitions, 3104 flow [2023-08-30 05:24:07,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 204.04545454545453) internal successors, (4489), 22 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:07,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:24:07,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:24:07,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:24:07,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:24:07,547 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:24:07,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:24:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1644636211, now seen corresponding path program 2 times [2023-08-30 05:24:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:24:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076315870] [2023-08-30 05:24:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:24:07,548 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 05:24:07,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:24:07,549 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:24:07,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:24:07,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:24:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:24:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:24:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:24:07,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:24:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:24:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:24:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:24:08,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:24:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076315870] [2023-08-30 05:24:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076315870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:24:08,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:24:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 05:24:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856568486] [2023-08-30 05:24:08,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:24:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:24:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:24:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:24:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:24:12,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 502 [2023-08-30 05:24:12,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 250 transitions, 3104 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:12,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:24:12,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 502 [2023-08-30 05:24:12,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:24:28,276 INFO L130 PetriNetUnfolder]: 46923/81610 cut-off events. [2023-08-30 05:24:28,277 INFO L131 PetriNetUnfolder]: For 520744/520744 co-relation queries the response was YES. [2023-08-30 05:24:29,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353952 conditions, 81610 events. 46923/81610 cut-off events. For 520744/520744 co-relation queries the response was YES. Maximal size of possible extension queue 1936. Compared 744993 event pairs, 31190 based on Foata normal form. 376/81986 useless extension candidates. Maximal degree in co-relation 353877. Up to 68959 conditions per place. [2023-08-30 05:24:29,858 INFO L137 encePairwiseOnDemand]: 490/502 looper letters, 353 selfloop transitions, 65 changer transitions 0/418 dead transitions. [2023-08-30 05:24:29,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 418 transitions, 5274 flow [2023-08-30 05:24:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:24:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:24:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2479 transitions. [2023-08-30 05:24:29,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115205843293493 [2023-08-30 05:24:29,863 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2479 transitions. [2023-08-30 05:24:29,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2479 transitions. [2023-08-30 05:24:29,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:24:29,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2479 transitions. [2023-08-30 05:24:29,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.58333333333334) internal successors, (2479), 12 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:29,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:29,869 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:29,870 INFO L175 Difference]: Start difference. First operand has 222 places, 250 transitions, 3104 flow. Second operand 12 states and 2479 transitions. [2023-08-30 05:24:29,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 418 transitions, 5274 flow [2023-08-30 05:24:38,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 418 transitions, 5134 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-08-30 05:24:38,582 INFO L231 Difference]: Finished difference. Result has 231 places, 253 transitions, 3193 flow [2023-08-30 05:24:38,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3193, PETRI_PLACES=231, PETRI_TRANSITIONS=253} [2023-08-30 05:24:38,583 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2023-08-30 05:24:38,583 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 253 transitions, 3193 flow [2023-08-30 05:24:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:38,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:24:38,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:24:38,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 05:24:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:24:38,784 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:24:38,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:24:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1332445124, now seen corresponding path program 1 times [2023-08-30 05:24:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:24:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256517818] [2023-08-30 05:24:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:24:38,785 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 05:24:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:24:38,786 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:24:38,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 05:24:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:24:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:24:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:24:38,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 05:24:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:24:39,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:24:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 05:24:39,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:24:39,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256517818] [2023-08-30 05:24:39,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256517818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:24:39,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:24:39,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:24:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955176234] [2023-08-30 05:24:39,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:24:39,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:24:39,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:24:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:24:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:24:41,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-08-30 05:24:41,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 253 transitions, 3193 flow. Second operand has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:24:41,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:24:41,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-08-30 05:24:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:25:12,940 INFO L130 PetriNetUnfolder]: 87990/150641 cut-off events. [2023-08-30 05:25:12,940 INFO L131 PetriNetUnfolder]: For 1033761/1033761 co-relation queries the response was YES. [2023-08-30 05:25:15,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762029 conditions, 150641 events. 87990/150641 cut-off events. For 1033761/1033761 co-relation queries the response was YES. Maximal size of possible extension queue 3491. Compared 1455024 event pairs, 19454 based on Foata normal form. 9980/160621 useless extension candidates. Maximal degree in co-relation 761949. Up to 45294 conditions per place. [2023-08-30 05:25:15,716 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 379 selfloop transitions, 116 changer transitions 0/495 dead transitions. [2023-08-30 05:25:15,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 495 transitions, 6772 flow [2023-08-30 05:25:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:25:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:25:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1751 transitions. [2023-08-30 05:25:15,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43600597609561753 [2023-08-30 05:25:15,721 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1751 transitions. [2023-08-30 05:25:15,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1751 transitions. [2023-08-30 05:25:15,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:25:15,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1751 transitions. [2023-08-30 05:25:15,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 218.875) internal successors, (1751), 8 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:25:15,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 502.0) internal successors, (4518), 9 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:25:15,726 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 502.0) internal successors, (4518), 9 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:25:15,727 INFO L175 Difference]: Start difference. First operand has 231 places, 253 transitions, 3193 flow. Second operand 8 states and 1751 transitions. [2023-08-30 05:25:15,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 495 transitions, 6772 flow [2023-08-30 05:26:27,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 495 transitions, 6684 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 05:26:27,042 INFO L231 Difference]: Finished difference. Result has 238 places, 268 transitions, 3780 flow [2023-08-30 05:26:27,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3780, PETRI_PLACES=238, PETRI_TRANSITIONS=268} [2023-08-30 05:26:27,043 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 184 predicate places. [2023-08-30 05:26:27,043 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 268 transitions, 3780 flow [2023-08-30 05:26:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:26:27,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:26:27,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:26:27,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:26:27,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:26:27,245 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:26:27,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:26:27,245 INFO L85 PathProgramCache]: Analyzing trace with hash 85768621, now seen corresponding path program 2 times [2023-08-30 05:26:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:26:27,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487787209] [2023-08-30 05:26:27,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:26:27,246 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 05:26:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:26:27,247 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:26:27,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:26:27,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:26:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:26:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:26:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:26:27,401 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:26:27,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:26:27,448 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:26:27,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:26:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:26:27,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:26:27,527 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:26:27,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:26:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 05:26:27,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:26:27,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:26:27,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487787209] [2023-08-30 05:26:27,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487787209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:26:27,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:26:27,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:26:27,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037754901] [2023-08-30 05:26:27,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:26:27,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:26:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:26:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:26:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:26:28,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-08-30 05:26:28,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 268 transitions, 3780 flow. Second operand has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:26:28,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:26:28,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-08-30 05:26:28,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:26:58,383 INFO L130 PetriNetUnfolder]: 85614/146537 cut-off events. [2023-08-30 05:26:58,383 INFO L131 PetriNetUnfolder]: For 1678128/1678128 co-relation queries the response was YES. [2023-08-30 05:27:00,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788153 conditions, 146537 events. 85614/146537 cut-off events. For 1678128/1678128 co-relation queries the response was YES. Maximal size of possible extension queue 3399. Compared 1417201 event pairs, 57284 based on Foata normal form. 1584/148121 useless extension candidates. Maximal degree in co-relation 788070. Up to 126703 conditions per place. [2023-08-30 05:27:01,283 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 267 selfloop transitions, 70 changer transitions 0/337 dead transitions. [2023-08-30 05:27:01,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 337 transitions, 5131 flow [2023-08-30 05:27:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:27:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:27:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1076 transitions. [2023-08-30 05:27:01,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42868525896414345 [2023-08-30 05:27:01,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1076 transitions. [2023-08-30 05:27:01,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1076 transitions. [2023-08-30 05:27:01,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:27:01,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1076 transitions. [2023-08-30 05:27:01,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:27:01,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:27:01,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:27:01,289 INFO L175 Difference]: Start difference. First operand has 238 places, 268 transitions, 3780 flow. Second operand 5 states and 1076 transitions. [2023-08-30 05:27:01,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 337 transitions, 5131 flow [2023-08-30 05:29:13,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 337 transitions, 4892 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-08-30 05:29:13,469 INFO L231 Difference]: Finished difference. Result has 240 places, 268 transitions, 3737 flow [2023-08-30 05:29:13,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3737, PETRI_PLACES=240, PETRI_TRANSITIONS=268} [2023-08-30 05:29:13,469 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 186 predicate places. [2023-08-30 05:29:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 268 transitions, 3737 flow [2023-08-30 05:29:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:29:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:29:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:29:13,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 05:29:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:29:13,680 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:29:13,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:29:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1833988864, now seen corresponding path program 1 times [2023-08-30 05:29:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:29:13,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933199133] [2023-08-30 05:29:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:29:13,681 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 05:29:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:29:13,681 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:29:13,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:29:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:29:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:29:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:29:13,891 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 05:29:13,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:29:13,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:29:13,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933199133] [2023-08-30 05:29:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933199133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:29:13,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:29:13,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:29:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703477530] [2023-08-30 05:29:13,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:29:13,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:29:13,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:29:13,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:29:13,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:29:13,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-08-30 05:29:13,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 268 transitions, 3737 flow. Second operand has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:29:13,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:29:13,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-08-30 05:29:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand