./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:19:22,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:19:22,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:19:22,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:19:22,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:19:22,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:19:22,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:19:22,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:19:22,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:19:22,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:19:22,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:19:22,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:19:22,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:19:22,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:19:22,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:19:22,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:19:22,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:19:22,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:19:22,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:19:22,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:19:22,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:19:22,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:19:22,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:19:22,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:19:22,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:19:22,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:19:22,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:19:22,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:19:22,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:19:22,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:19:22,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:19:22,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:19:22,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:19:22,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:19:22,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:19:22,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:19:22,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:19:22,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:19:22,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:19:22,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:19:22,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:19:22,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:19:22,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:19:22,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:19:22,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:19:22,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:19:22,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:19:22,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:19:22,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:19:22,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:19:22,379 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:19:22,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:19:22,380 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:19:22,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:19:22,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:19:22,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:19:22,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:19:22,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:19:22,381 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:19:22,381 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:19:22,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:19:22,382 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:19:22,382 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:19:22,382 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:19:22,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:19:22,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:19:22,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:19:22,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:22,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:19:22,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:19:22,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:19:22,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:19:22,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:19:22,384 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:19:22,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:19:22,385 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:19:22,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:19:22,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:19:22,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:19:22,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:19:22,713 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:19:22,713 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:19:22,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 00:19:23,996 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:19:24,184 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:19:24,185 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 00:19:24,191 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e477d682/e128e198b5344bb69cd12bd3224f1163/FLAG1a385908e [2023-08-30 00:19:24,208 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e477d682/e128e198b5344bb69cd12bd3224f1163 [2023-08-30 00:19:24,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:19:24,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:19:24,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:24,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:19:24,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:19:24,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:24" (1/1) ... [2023-08-30 00:19:24,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449f7e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:24, skipping insertion in model container [2023-08-30 00:19:24,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:24" (1/1) ... [2023-08-30 00:19:24,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:19:24,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:24,383 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 00:19:24,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:24,407 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 00:19:24,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68ab94e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:24, skipping insertion in model container [2023-08-30 00:19:24,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:24,409 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:19:24,410 INFO L158 Benchmark]: Toolchain (without parser) took 198.01ms. Allocated memory is still 79.7MB. Free memory was 57.7MB in the beginning and 47.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:19:24,411 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 79.7MB. Free memory was 56.8MB in the beginning and 56.8MB in the end (delta: 60.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:19:24,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 79.7MB. Free memory was 57.4MB in the beginning and 47.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:19:24,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 79.7MB. Free memory was 56.8MB in the beginning and 56.8MB in the end (delta: 60.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 79.7MB. Free memory was 57.4MB in the beginning and 47.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:19:26,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:19:26,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:19:26,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:19:26,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:19:26,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:19:26,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:19:26,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:19:26,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:19:26,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:19:26,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:19:26,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:19:26,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:19:26,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:19:26,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:19:26,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:19:26,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:19:26,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:19:26,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:19:26,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:19:26,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:19:26,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:19:26,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:19:26,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:19:26,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:19:26,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:19:26,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:19:26,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:19:26,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:19:26,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:19:26,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:19:26,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:19:26,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:19:26,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:19:26,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:19:26,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:19:26,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:19:26,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:19:26,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:19:26,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:19:26,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:19:26,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:19:26,264 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:19:26,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:19:26,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:19:26,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:19:26,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:19:26,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:19:26,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:19:26,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:19:26,268 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:19:26,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:19:26,268 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:19:26,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:19:26,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:19:26,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:19:26,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:19:26,269 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:19:26,270 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:19:26,271 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:19:26,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:19:26,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:19:26,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:19:26,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:26,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:19:26,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:19:26,272 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:19:26,272 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:19:26,272 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:19:26,273 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:19:26,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:19:26,273 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:19:26,273 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:19:26,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:19:26,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:19:26,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:19:26,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:19:26,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:19:26,612 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:19:26,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 00:19:27,805 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:19:28,035 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:19:28,036 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-30 00:19:28,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582d35734/77aa80a0dafc40dcb2cc02a30a3d4661/FLAG1385d6c0e [2023-08-30 00:19:28,055 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582d35734/77aa80a0dafc40dcb2cc02a30a3d4661 [2023-08-30 00:19:28,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:19:28,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:19:28,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:28,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:19:28,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:19:28,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174bb546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28, skipping insertion in model container [2023-08-30 00:19:28,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:19:28,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:28,240 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 00:19:28,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:28,278 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:19:28,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:28,314 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 00:19:28,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:28,332 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:19:28,362 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-30 00:19:28,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:28,387 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:19:28,388 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:19:28,394 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:19:28,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28 WrapperNode [2023-08-30 00:19:28,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:28,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:19:28,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:19:28,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:19:28,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,466 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 265 [2023-08-30 00:19:28,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:19:28,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:19:28,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:19:28,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:19:28,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:19:28,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:19:28,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:19:28,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:19:28,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (1/1) ... [2023-08-30 00:19:28,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:19:28,636 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 00:19:28,658 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 00:19:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:19:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:19:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:19:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:19:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:19:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:19:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:19:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:19:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:19:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:19:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:19:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:19:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:19:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:19:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:19:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:19:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:19:28,679 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 00:19:28,860 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:19:28,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:19:29,513 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:19:29,802 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:19:29,803 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:19:29,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:19:29 BoogieIcfgContainer [2023-08-30 00:19:29,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:19:29,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:19:29,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:19:29,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:19:29,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:19:28" (1/3) ... [2023-08-30 00:19:29,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9b0736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:19:29, skipping insertion in model container [2023-08-30 00:19:29,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:28" (2/3) ... [2023-08-30 00:19:29,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9b0736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:19:29, skipping insertion in model container [2023-08-30 00:19:29,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:19:29" (3/3) ... [2023-08-30 00:19:29,814 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-08-30 00:19:29,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:19:29,831 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 00:19:29,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:19:29,937 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:19:29,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 208 transitions, 440 flow [2023-08-30 00:19:30,055 INFO L130 PetriNetUnfolder]: 16/205 cut-off events. [2023-08-30 00:19:30,056 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:19:30,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 16/205 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 238 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 00:19:30,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 208 transitions, 440 flow [2023-08-30 00:19:30,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 201 transitions, 420 flow [2023-08-30 00:19:30,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:19:30,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 201 transitions, 420 flow [2023-08-30 00:19:30,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 201 transitions, 420 flow [2023-08-30 00:19:30,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 420 flow [2023-08-30 00:19:30,164 INFO L130 PetriNetUnfolder]: 16/201 cut-off events. [2023-08-30 00:19:30,164 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:19:30,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 16/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 237 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-08-30 00:19:30,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 00:19:58,494 INFO L134 LiptonReduction]: Checked pairs total: 3527 [2023-08-30 00:19:58,494 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 00:19:58,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:19:58,524 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;@60be737, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:19:58,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-30 00:19:58,527 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:19:58,527 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:19:58,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:58,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:19:58,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:58,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:58,535 INFO L85 PathProgramCache]: Analyzing trace with hash 35161, now seen corresponding path program 1 times [2023-08-30 00:19:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:58,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271270939] [2023-08-30 00:19:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:58,550 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 00:19:58,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:58,561 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 00:19:58,579 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 00:19:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:19:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:58,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:19:58,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:19:59,012 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 00:19:59,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:19:59,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271270939] [2023-08-30 00:19:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271270939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:19:59,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:19:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:19:59,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357476844] [2023-08-30 00:19:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:19:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:19:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:19:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:19:59,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-30 00:19:59,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:59,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:59,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-30 00:19:59,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:01,990 INFO L130 PetriNetUnfolder]: 15053/18713 cut-off events. [2023-08-30 00:20:01,990 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 00:20:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37660 conditions, 18713 events. 15053/18713 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 90038 event pairs, 7293 based on Foata normal form. 0/3655 useless extension candidates. Maximal degree in co-relation 16870. Up to 9306 conditions per place. [2023-08-30 00:20:02,115 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 95 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-30 00:20:02,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 438 flow [2023-08-30 00:20:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:20:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:20:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-30 00:20:02,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830575256107171 [2023-08-30 00:20:02,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-30 00:20:02,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-30 00:20:02,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:02,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-30 00:20:02,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:02,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:02,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:02,147 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 613 transitions. [2023-08-30 00:20:02,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 438 flow [2023-08-30 00:20:02,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 414 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:20:02,168 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 146 flow [2023-08-30 00:20:02,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-30 00:20:02,173 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-30 00:20:02,173 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 146 flow [2023-08-30 00:20:02,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:02,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:02,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:20:02,188 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 00:20:02,384 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 00:20:02,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:02,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 35162, now seen corresponding path program 1 times [2023-08-30 00:20:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:02,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523982432] [2023-08-30 00:20:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:02,387 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 00:20:02,421 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 00:20:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:20:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:02,543 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:20:02,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:20:02,560 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 00:20:02,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:20:02,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:02,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523982432] [2023-08-30 00:20:02,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523982432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:20:02,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:20:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:20:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063211019] [2023-08-30 00:20:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:20:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:20:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:20:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:20:02,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-30 00:20:02,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:02,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:02,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-30 00:20:02,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:04,918 INFO L130 PetriNetUnfolder]: 15067/18723 cut-off events. [2023-08-30 00:20:04,918 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 00:20:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 18723 events. 15067/18723 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90630 event pairs, 7296 based on Foata normal form. 2/3513 useless extension candidates. Maximal degree in co-relation 18721. Up to 18611 conditions per place. [2023-08-30 00:20:05,018 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:20:05,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 246 flow [2023-08-30 00:20:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:20:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:20:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-30 00:20:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44208037825059104 [2023-08-30 00:20:05,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-30 00:20:05,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-30 00:20:05,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:05,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-30 00:20:05,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:05,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:05,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:05,029 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 146 flow. Second operand 3 states and 561 transitions. [2023-08-30 00:20:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 246 flow [2023-08-30 00:20:05,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:20:05,032 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 136 flow [2023-08-30 00:20:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=136, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-08-30 00:20:05,033 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-30 00:20:05,033 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 136 flow [2023-08-30 00:20:05,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:05,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:20:05,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 00:20:05,245 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 00:20:05,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:05,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1093315, now seen corresponding path program 1 times [2023-08-30 00:20:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972950892] [2023-08-30 00:20:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:05,251 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 00:20:05,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:05,253 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 00:20:05,255 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 00:20:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:20:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:05,430 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:20:05,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:20:05,493 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 00:20:05,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:05,684 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 00:20:05,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972950892] [2023-08-30 00:20:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972950892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:05,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:05,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:20:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320481183] [2023-08-30 00:20:05,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:05,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:20:05,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:20:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:20:06,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 423 [2023-08-30 00:20:06,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:06,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:06,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 423 [2023-08-30 00:20:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:08,521 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 00:20:11,795 INFO L130 PetriNetUnfolder]: 22580/28067 cut-off events. [2023-08-30 00:20:11,796 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 00:20:11,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56158 conditions, 28067 events. 22580/28067 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 2200. Compared 140309 event pairs, 10938 based on Foata normal form. 0/5565 useless extension candidates. Maximal degree in co-relation 56150. Up to 9307 conditions per place. [2023-08-30 00:20:11,919 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 134 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2023-08-30 00:20:11,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 156 transitions, 674 flow [2023-08-30 00:20:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:20:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:20:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1119 transitions. [2023-08-30 00:20:11,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089834515366433 [2023-08-30 00:20:11,923 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1119 transitions. [2023-08-30 00:20:11,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1119 transitions. [2023-08-30 00:20:11,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:11,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1119 transitions. [2023-08-30 00:20:11,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:11,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:11,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:11,934 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 136 flow. Second operand 6 states and 1119 transitions. [2023-08-30 00:20:11,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 156 transitions, 674 flow [2023-08-30 00:20:11,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 156 transitions, 673 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:20:11,940 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 280 flow [2023-08-30 00:20:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-30 00:20:11,941 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 00:20:11,942 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 280 flow [2023-08-30 00:20:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:11,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:11,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:20:11,959 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 00:20:12,155 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 00:20:12,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:12,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1094234, now seen corresponding path program 1 times [2023-08-30 00:20:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323964998] [2023-08-30 00:20:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:12,157 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 00:20:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:12,159 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 00:20:12,161 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 00:20:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:20:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:12,268 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 00:20:12,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:20:12,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323964998] [2023-08-30 00:20:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323964998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:20:12,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:20:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:20:12,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931918709] [2023-08-30 00:20:12,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:20:12,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:20:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:20:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:20:12,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-30 00:20:12,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:12,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:12,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-30 00:20:12,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:14,052 INFO L130 PetriNetUnfolder]: 15075/18738 cut-off events. [2023-08-30 00:20:14,052 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 00:20:14,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37560 conditions, 18738 events. 15075/18738 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1878. Compared 90678 event pairs, 7296 based on Foata normal form. 3/3526 useless extension candidates. Maximal degree in co-relation 37547. Up to 18621 conditions per place. [2023-08-30 00:20:14,142 INFO L137 encePairwiseOnDemand]: 416/423 looper letters, 59 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2023-08-30 00:20:14,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 414 flow [2023-08-30 00:20:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:20:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:20:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-08-30 00:20:14,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391252955082742 [2023-08-30 00:20:14,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-08-30 00:20:14,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-08-30 00:20:14,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:14,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-08-30 00:20:14,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:14,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:14,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:14,151 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 280 flow. Second operand 4 states and 743 transitions. [2023-08-30 00:20:14,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 414 flow [2023-08-30 00:20:14,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 395 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:20:14,154 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 290 flow [2023-08-30 00:20:14,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-30 00:20:14,155 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-08-30 00:20:14,155 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 290 flow [2023-08-30 00:20:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:14,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:14,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:20:14,171 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 00:20:14,365 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 00:20:14,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:14,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807926, now seen corresponding path program 1 times [2023-08-30 00:20:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:14,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240577072] [2023-08-30 00:20:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:14,368 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 00:20:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:14,370 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 00:20:14,375 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 00:20:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:20:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:14,587 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 00:20:14,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 00:20:14,937 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 00:20:14,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:20:15,030 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 00:20:15,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:20:15,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240577072] [2023-08-30 00:20:15,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240577072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:20:15,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:20:15,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:20:15,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006943348] [2023-08-30 00:20:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:20:15,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:20:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:20:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:20:15,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-08-30 00:20:15,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:15,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:15,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-08-30 00:20:15,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:16,874 INFO L130 PetriNetUnfolder]: 11643/14617 cut-off events. [2023-08-30 00:20:16,875 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 00:20:16,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29318 conditions, 14617 events. 11643/14617 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 70593 event pairs, 5630 based on Foata normal form. 0/3033 useless extension candidates. Maximal degree in co-relation 29302. Up to 14505 conditions per place. [2023-08-30 00:20:16,950 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 00:20:16,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 390 flow [2023-08-30 00:20:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:20:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:20:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-30 00:20:16,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44759653270291566 [2023-08-30 00:20:16,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-30 00:20:16,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-30 00:20:16,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:16,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-30 00:20:16,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:16,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:16,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:16,960 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 290 flow. Second operand 3 states and 568 transitions. [2023-08-30 00:20:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 390 flow [2023-08-30 00:20:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 372 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 00:20:16,963 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 250 flow [2023-08-30 00:20:16,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-08-30 00:20:16,964 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 00:20:16,964 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 250 flow [2023-08-30 00:20:16,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:16,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:16,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:20:16,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 00:20:17,178 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 00:20:17,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:17,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1050807927, now seen corresponding path program 1 times [2023-08-30 00:20:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58791658] [2023-08-30 00:20:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:17,180 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 00:20:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:17,184 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 00:20:17,186 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 00:20:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 00:20:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:17,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:17,417 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 00:20:17,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2023-08-30 00:20:17,439 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:20:17,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:20:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:17,673 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:20:17,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:20:17,779 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 00:20:17,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:18,051 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 00:20:18,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58791658] [2023-08-30 00:20:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58791658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:18,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:18,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:20:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727761874] [2023-08-30 00:20:18,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:18,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:20:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:20:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:20:20,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 00:20:20,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:20,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:20,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 00:20:20,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:26,288 INFO L130 PetriNetUnfolder]: 24555/31403 cut-off events. [2023-08-30 00:20:26,288 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 00:20:26,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62928 conditions, 31403 events. 24555/31403 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 172480 event pairs, 11877 based on Foata normal form. 0/7857 useless extension candidates. Maximal degree in co-relation 62913. Up to 10341 conditions per place. [2023-08-30 00:20:26,442 INFO L137 encePairwiseOnDemand]: 414/423 looper letters, 203 selfloop transitions, 30 changer transitions 0/236 dead transitions. [2023-08-30 00:20:26,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 236 transitions, 1180 flow [2023-08-30 00:20:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:20:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:20:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2728 transitions. [2023-08-30 00:20:26,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030732860520095 [2023-08-30 00:20:26,450 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2728 transitions. [2023-08-30 00:20:26,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2728 transitions. [2023-08-30 00:20:26,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:26,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2728 transitions. [2023-08-30 00:20:26,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.5) internal successors, (2728), 16 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:26,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:26,468 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:26,468 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 250 flow. Second operand 16 states and 2728 transitions. [2023-08-30 00:20:26,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 236 transitions, 1180 flow [2023-08-30 00:20:26,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 236 transitions, 1179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:20:26,472 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 440 flow [2023-08-30 00:20:26,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=440, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-30 00:20:26,473 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-08-30 00:20:26,473 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 440 flow [2023-08-30 00:20:26,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:26,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:26,474 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:20:26,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:26,683 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 00:20:26,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:26,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1785490471, now seen corresponding path program 2 times [2023-08-30 00:20:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:26,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391710000] [2023-08-30 00:20:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:20:26,686 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 00:20:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:26,687 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 00:20:26,688 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 00:20:26,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:20:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:20:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:20:26,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:26,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:20:26,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:20:26,973 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 00:20:26,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:27,456 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 00:20:27,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391710000] [2023-08-30 00:20:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391710000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:27,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:20:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565992979] [2023-08-30 00:20:27,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:20:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:20:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:20:30,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 00:20:30,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 440 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:30,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:30,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 00:20:30,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:33,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:35,914 WARN L539 Checker$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 00:20:37,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:39,556 WARN L539 Checker$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 00:20:41,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:43,034 WARN L539 Checker$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 00:20:44,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:57,605 INFO L130 PetriNetUnfolder]: 77737/99406 cut-off events. [2023-08-30 00:20:57,605 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-08-30 00:20:57,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199164 conditions, 99406 events. 77737/99406 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 4691. Compared 600784 event pairs, 37610 based on Foata normal form. 15/24872 useless extension candidates. Maximal degree in co-relation 199146. Up to 15554 conditions per place. [2023-08-30 00:20:58,089 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 381 selfloop transitions, 53 changer transitions 0/437 dead transitions. [2023-08-30 00:20:58,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 437 transitions, 2413 flow [2023-08-30 00:20:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:20:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:20:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3163 transitions. [2023-08-30 00:20:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398553747740231 [2023-08-30 00:20:58,099 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3163 transitions. [2023-08-30 00:20:58,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3163 transitions. [2023-08-30 00:20:58,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:58,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3163 transitions. [2023-08-30 00:20:58,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 186.05882352941177) internal successors, (3163), 17 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:58,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 423.0) internal successors, (7614), 18 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:58,117 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 423.0) internal successors, (7614), 18 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:58,118 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 440 flow. Second operand 17 states and 3163 transitions. [2023-08-30 00:20:58,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 437 transitions, 2413 flow [2023-08-30 00:20:58,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 437 transitions, 2357 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-30 00:20:58,125 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 923 flow [2023-08-30 00:20:58,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=923, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2023-08-30 00:20:58,126 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2023-08-30 00:20:58,126 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 923 flow [2023-08-30 00:20:58,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:58,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:58,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:20:58,140 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 00:20:58,336 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 00:20:58,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:58,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash 509131622, now seen corresponding path program 1 times [2023-08-30 00:20:58,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:58,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022593105] [2023-08-30 00:20:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:58,337 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 00:20:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:58,338 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 00:20:58,339 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 00:20:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:20:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:58,545 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:20:58,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2023-08-30 00:20:58,559 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 00:20:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:58,722 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:20:58,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:20:58,886 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 00:20:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:59,129 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 00:20:59,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:59,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022593105] [2023-08-30 00:20:59,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022593105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:59,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:59,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:20:59,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446183279] [2023-08-30 00:20:59,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:59,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:20:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:20:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:21:00,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 00:21:00,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:00,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:00,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 00:21:00,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:12,599 INFO L130 PetriNetUnfolder]: 74543/95331 cut-off events. [2023-08-30 00:21:12,599 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-08-30 00:21:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191137 conditions, 95331 events. 74543/95331 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 572745 event pairs, 35993 based on Foata normal form. 0/24494 useless extension candidates. Maximal degree in co-relation 191111. Up to 44420 conditions per place. [2023-08-30 00:21:13,157 INFO L137 encePairwiseOnDemand]: 412/423 looper letters, 226 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2023-08-30 00:21:13,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 290 transitions, 1969 flow [2023-08-30 00:21:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:21:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:21:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2727 transitions. [2023-08-30 00:21:13,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029255319148936 [2023-08-30 00:21:13,165 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2727 transitions. [2023-08-30 00:21:13,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2727 transitions. [2023-08-30 00:21:13,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:13,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2727 transitions. [2023-08-30 00:21:13,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.4375) internal successors, (2727), 16 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:13,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:13,180 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 423.0) internal successors, (7191), 17 states have internal predecessors, (7191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:13,180 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 923 flow. Second operand 16 states and 2727 transitions. [2023-08-30 00:21:13,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 290 transitions, 1969 flow [2023-08-30 00:21:13,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 290 transitions, 1831 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-08-30 00:21:13,190 INFO L231 Difference]: Finished difference. Result has 116 places, 122 transitions, 996 flow [2023-08-30 00:21:13,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=996, PETRI_PLACES=116, PETRI_TRANSITIONS=122} [2023-08-30 00:21:13,191 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 56 predicate places. [2023-08-30 00:21:13,191 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 996 flow [2023-08-30 00:21:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.75) internal successors, (1262), 8 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:13,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:13,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:13,206 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 00:21:13,401 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 00:21:13,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:13,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 509131621, now seen corresponding path program 1 times [2023-08-30 00:21:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253600244] [2023-08-30 00:21:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:13,403 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 00:21:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:13,404 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 00:21:13,407 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 00:21:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:21:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:13,576 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 00:21:13,576 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 00:21:13,838 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 00:21:13,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:21:13,952 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 00:21:13,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:13,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253600244] [2023-08-30 00:21:13,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253600244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:13,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:13,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:13,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700356386] [2023-08-30 00:21:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:13,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:13,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:14,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 423 [2023-08-30 00:21:14,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 122 transitions, 996 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:14,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:14,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 423 [2023-08-30 00:21:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:23,442 INFO L130 PetriNetUnfolder]: 71306/90974 cut-off events. [2023-08-30 00:21:23,442 INFO L131 PetriNetUnfolder]: For 1715/1715 co-relation queries the response was YES. [2023-08-30 00:21:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182922 conditions, 90974 events. 71306/90974 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 4266. Compared 543602 event pairs, 34321 based on Foata normal form. 162/23262 useless extension candidates. Maximal degree in co-relation 182889. Up to 89902 conditions per place. [2023-08-30 00:21:24,066 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 116 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-08-30 00:21:24,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 120 transitions, 1226 flow [2023-08-30 00:21:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-30 00:21:24,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 00:21:24,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-30 00:21:24,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-30 00:21:24,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:24,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-30 00:21:24,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:24,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:24,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:24,073 INFO L175 Difference]: Start difference. First operand has 116 places, 122 transitions, 996 flow. Second operand 3 states and 564 transitions. [2023-08-30 00:21:24,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 120 transitions, 1226 flow [2023-08-30 00:21:24,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 1141 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 00:21:24,082 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 909 flow [2023-08-30 00:21:24,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=909, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2023-08-30 00:21:24,083 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2023-08-30 00:21:24,083 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 909 flow [2023-08-30 00:21:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:24,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:24,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:24,094 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 00:21:24,294 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 00:21:24,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:24,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794701, now seen corresponding path program 1 times [2023-08-30 00:21:24,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:24,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626173275] [2023-08-30 00:21:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:24,295 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 00:21:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:24,296 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 00:21:24,297 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 00:21:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:24,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:21:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:24,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:21:24,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:21:24,573 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:21:24,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:21:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:24,661 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 00:21:24,679 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:21:24,679 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 00:21:24,756 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 00:21:24,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:21:25,233 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 00:21:25,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626173275] [2023-08-30 00:21:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626173275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:21:25,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:21:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:21:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953323041] [2023-08-30 00:21:25,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:21:25,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:21:25,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:21:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:21:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 423 [2023-08-30 00:21:27,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 909 flow. Second operand has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:27,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:27,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 423 [2023-08-30 00:21:27,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:56,702 INFO L130 PetriNetUnfolder]: 131082/170406 cut-off events. [2023-08-30 00:21:56,702 INFO L131 PetriNetUnfolder]: For 2337/2337 co-relation queries the response was YES. [2023-08-30 00:21:57,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342979 conditions, 170406 events. 131082/170406 cut-off events. For 2337/2337 co-relation queries the response was YES. Maximal size of possible extension queue 8210. Compared 1144991 event pairs, 36264 based on Foata normal form. 0/49310 useless extension candidates. Maximal degree in co-relation 342946. Up to 22194 conditions per place. [2023-08-30 00:21:58,079 INFO L137 encePairwiseOnDemand]: 410/423 looper letters, 633 selfloop transitions, 93 changer transitions 0/728 dead transitions. [2023-08-30 00:21:58,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 728 transitions, 3865 flow [2023-08-30 00:21:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:21:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:21:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5328 transitions. [2023-08-30 00:21:58,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40631434454358273 [2023-08-30 00:21:58,091 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5328 transitions. [2023-08-30 00:21:58,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5328 transitions. [2023-08-30 00:21:58,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:58,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5328 transitions. [2023-08-30 00:21:58,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 171.8709677419355) internal successors, (5328), 31 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:58,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:58,121 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 423.0) internal successors, (13536), 32 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:58,121 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 909 flow. Second operand 31 states and 5328 transitions. [2023-08-30 00:21:58,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 728 transitions, 3865 flow [2023-08-30 00:21:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 728 transitions, 3864 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:58,137 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1268 flow [2023-08-30 00:21:58,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1268, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2023-08-30 00:21:58,138 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2023-08-30 00:21:58,138 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1268 flow [2023-08-30 00:21:58,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.6) internal successors, (1516), 10 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:58,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:58,139 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 00:21:58,151 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 00:21:58,348 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 00:21:58,349 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:58,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2130707981, now seen corresponding path program 2 times [2023-08-30 00:21:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187606022] [2023-08-30 00:21:58,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:21:58,350 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 00:21:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:58,351 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 00:21:58,353 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 00:21:58,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:21:58,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:21:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:21:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:58,529 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:21:58,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:21:58,548 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:21:58,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:21:58,657 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:21:58,658 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 00:21:58,724 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 00:21:58,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:58,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187606022] [2023-08-30 00:21:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187606022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:58,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:58,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:21:58,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44423486] [2023-08-30 00:21:58,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:58,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:21:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:21:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:21:59,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 423 [2023-08-30 00:21:59,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1268 flow. Second operand has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 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 00:21:59,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:59,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 423 [2023-08-30 00:21:59,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:16,299 INFO L130 PetriNetUnfolder]: 121775/158804 cut-off events. [2023-08-30 00:22:16,300 INFO L131 PetriNetUnfolder]: For 134040/139351 co-relation queries the response was YES. [2023-08-30 00:22:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388198 conditions, 158804 events. 121775/158804 cut-off events. For 134040/139351 co-relation queries the response was YES. Maximal size of possible extension queue 7655. Compared 1080968 event pairs, 65883 based on Foata normal form. 4248/57155 useless extension candidates. Maximal degree in co-relation 388158. Up to 156985 conditions per place. [2023-08-30 00:22:17,736 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 133 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2023-08-30 00:22:17,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 155 transitions, 1440 flow [2023-08-30 00:22:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 723 transitions. [2023-08-30 00:22:17,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42730496453900707 [2023-08-30 00:22:17,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 723 transitions. [2023-08-30 00:22:17,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 723 transitions. [2023-08-30 00:22:17,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:17,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 723 transitions. [2023-08-30 00:22:17,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:17,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:17,743 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:17,743 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1268 flow. Second operand 4 states and 723 transitions. [2023-08-30 00:22:17,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 155 transitions, 1440 flow [2023-08-30 00:22:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 155 transitions, 1328 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 00:22:18,070 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1062 flow [2023-08-30 00:22:18,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1062, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-08-30 00:22:18,071 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2023-08-30 00:22:18,071 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1062 flow [2023-08-30 00:22:18,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 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 00:22:18,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:18,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:18,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 00:22:18,272 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 00:22:18,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:18,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794702, now seen corresponding path program 1 times [2023-08-30 00:22:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641750533] [2023-08-30 00:22:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:18,273 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 00:22:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:18,274 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 00:22:18,275 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 00:22:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:18,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:22:18,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:18,436 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:22:18,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:22:18,461 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:22:18,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:22:18,471 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 00:22:18,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:18,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:18,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641750533] [2023-08-30 00:22:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641750533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:18,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:22:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714539075] [2023-08-30 00:22:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:18,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:22:18,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:18,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:22:18,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:22:18,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 423 [2023-08-30 00:22:18,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1062 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:18,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:18,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 423 [2023-08-30 00:22:18,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:29,823 INFO L130 PetriNetUnfolder]: 75581/99551 cut-off events. [2023-08-30 00:22:29,823 INFO L131 PetriNetUnfolder]: For 101065/105071 co-relation queries the response was YES. [2023-08-30 00:22:30,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252805 conditions, 99551 events. 75581/99551 cut-off events. For 101065/105071 co-relation queries the response was YES. Maximal size of possible extension queue 4796. Compared 661481 event pairs, 40056 based on Foata normal form. 3204/41084 useless extension candidates. Maximal degree in co-relation 252768. Up to 98260 conditions per place. [2023-08-30 00:22:30,663 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 130 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2023-08-30 00:22:30,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 152 transitions, 1338 flow [2023-08-30 00:22:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2023-08-30 00:22:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2023-08-30 00:22:30,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2023-08-30 00:22:30,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2023-08-30 00:22:30,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:30,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2023-08-30 00:22:30,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:30,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:30,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:30,667 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1062 flow. Second operand 4 states and 702 transitions. [2023-08-30 00:22:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 152 transitions, 1338 flow [2023-08-30 00:22:30,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 152 transitions, 1326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:22:30,877 INFO L231 Difference]: Finished difference. Result has 130 places, 152 transitions, 1066 flow [2023-08-30 00:22:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1066, PETRI_PLACES=130, PETRI_TRANSITIONS=152} [2023-08-30 00:22:30,878 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 70 predicate places. [2023-08-30 00:22:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 152 transitions, 1066 flow [2023-08-30 00:22:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:30,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:30,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:30,892 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 00:22:31,091 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 00:22:31,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:31,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794699, now seen corresponding path program 1 times [2023-08-30 00:22:31,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:31,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988134423] [2023-08-30 00:22:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:31,252 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 00:22:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:31,253 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 00:22:31,263 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 00:22:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:22:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:31,402 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 00:22:31,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:31,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:22:31,575 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 00:22:31,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988134423] [2023-08-30 00:22:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988134423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:31,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:31,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 00:22:31,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997481111] [2023-08-30 00:22:31,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:22:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:22:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:22:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 423 [2023-08-30 00:22:32,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 152 transitions, 1066 flow. Second operand has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:32,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:32,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 423 [2023-08-30 00:22:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:47,633 INFO L130 PetriNetUnfolder]: 96197/126359 cut-off events. [2023-08-30 00:22:47,634 INFO L131 PetriNetUnfolder]: For 63740/63740 co-relation queries the response was YES. [2023-08-30 00:22:48,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309692 conditions, 126359 events. 96197/126359 cut-off events. For 63740/63740 co-relation queries the response was YES. Maximal size of possible extension queue 5797. Compared 851343 event pairs, 31503 based on Foata normal form. 0/49868 useless extension candidates. Maximal degree in co-relation 309655. Up to 67781 conditions per place. [2023-08-30 00:22:48,707 INFO L137 encePairwiseOnDemand]: 415/423 looper letters, 173 selfloop transitions, 66 changer transitions 0/241 dead transitions. [2023-08-30 00:22:48,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 241 transitions, 1862 flow [2023-08-30 00:22:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:22:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:22:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1599 transitions. [2023-08-30 00:22:48,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42001576044129235 [2023-08-30 00:22:48,710 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1599 transitions. [2023-08-30 00:22:48,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1599 transitions. [2023-08-30 00:22:48,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:48,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1599 transitions. [2023-08-30 00:22:48,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.66666666666666) internal successors, (1599), 9 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:48,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:48,716 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:48,716 INFO L175 Difference]: Start difference. First operand has 130 places, 152 transitions, 1066 flow. Second operand 9 states and 1599 transitions. [2023-08-30 00:22:48,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 241 transitions, 1862 flow [2023-08-30 00:22:49,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 1850 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:22:49,144 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 1229 flow [2023-08-30 00:22:49,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2023-08-30 00:22:49,145 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 78 predicate places. [2023-08-30 00:22:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 1229 flow [2023-08-30 00:22:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:49,153 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 00:22:49,346 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 00:22:49,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:49,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1396794700, now seen corresponding path program 1 times [2023-08-30 00:22:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:49,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134101613] [2023-08-30 00:22:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:49,347 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 00:22:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:49,348 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 00:22:49,349 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 00:22:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:22:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:49,438 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 00:22:49,450 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 00:22:49,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:49,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:49,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134101613] [2023-08-30 00:22:49,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134101613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:49,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:49,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:22:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90307327] [2023-08-30 00:22:49,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:49,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:22:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:22:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:22:49,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-08-30 00:22:49,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 1229 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:49,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:49,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-08-30 00:22:49,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:57,153 INFO L130 PetriNetUnfolder]: 45415/61789 cut-off events. [2023-08-30 00:22:57,153 INFO L131 PetriNetUnfolder]: For 224004/230924 co-relation queries the response was YES. [2023-08-30 00:22:57,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165477 conditions, 61789 events. 45415/61789 cut-off events. For 224004/230924 co-relation queries the response was YES. Maximal size of possible extension queue 3026. Compared 418776 event pairs, 25200 based on Foata normal form. 8126/38149 useless extension candidates. Maximal degree in co-relation 165438. Up to 60828 conditions per place. [2023-08-30 00:22:57,659 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 90 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2023-08-30 00:22:57,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 132 transitions, 1404 flow [2023-08-30 00:22:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2023-08-30 00:22:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42021276595744683 [2023-08-30 00:22:57,661 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2023-08-30 00:22:57,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2023-08-30 00:22:57,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:57,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2023-08-30 00:22:57,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:57,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:57,663 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:57,663 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 1229 flow. Second operand 4 states and 711 transitions. [2023-08-30 00:22:57,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 132 transitions, 1404 flow [2023-08-30 00:22:57,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 1361 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 00:22:57,886 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 1181 flow [2023-08-30 00:22:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1181, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2023-08-30 00:22:57,887 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2023-08-30 00:22:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 1181 flow [2023-08-30 00:22:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:57,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-30 00:22:58,087 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 00:22:58,088 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:58,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -350958929, now seen corresponding path program 1 times [2023-08-30 00:22:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:58,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404296333] [2023-08-30 00:22:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:58,089 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 00:22:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:58,090 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 00:22:58,091 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 00:22:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:22:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:58,302 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 00:22:58,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:58,422 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 00:22:58,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404296333] [2023-08-30 00:22:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404296333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:58,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:22:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853519742] [2023-08-30 00:22:58,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:22:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:22:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:22:59,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 423 [2023-08-30 00:22:59,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 1181 flow. Second operand has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:59,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:59,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 423 [2023-08-30 00:22:59,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:05,738 INFO L130 PetriNetUnfolder]: 36454/48682 cut-off events. [2023-08-30 00:23:05,738 INFO L131 PetriNetUnfolder]: For 76998/76998 co-relation queries the response was YES. [2023-08-30 00:23:05,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130455 conditions, 48682 events. 36454/48682 cut-off events. For 76998/76998 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 304800 event pairs, 11128 based on Foata normal form. 869/24828 useless extension candidates. Maximal degree in co-relation 130417. Up to 25524 conditions per place. [2023-08-30 00:23:06,124 INFO L137 encePairwiseOnDemand]: 411/423 looper letters, 139 selfloop transitions, 48 changer transitions 0/189 dead transitions. [2023-08-30 00:23:06,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 1577 flow [2023-08-30 00:23:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:23:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:23:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1920 transitions. [2023-08-30 00:23:06,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126370083816892 [2023-08-30 00:23:06,128 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1920 transitions. [2023-08-30 00:23:06,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1920 transitions. [2023-08-30 00:23:06,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:06,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1920 transitions. [2023-08-30 00:23:06,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.54545454545453) internal successors, (1920), 11 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:06,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:06,134 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 423.0) internal successors, (5076), 12 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:06,134 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 1181 flow. Second operand 11 states and 1920 transitions. [2023-08-30 00:23:06,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 1577 flow [2023-08-30 00:23:06,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1510 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 00:23:06,910 INFO L231 Difference]: Finished difference. Result has 129 places, 111 transitions, 1044 flow [2023-08-30 00:23:06,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1044, PETRI_PLACES=129, PETRI_TRANSITIONS=111} [2023-08-30 00:23:06,910 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2023-08-30 00:23:06,910 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 111 transitions, 1044 flow [2023-08-30 00:23:06,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.5) internal successors, (1974), 12 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:06,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:06,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:06,919 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 (16)] Ended with exit code 0 [2023-08-30 00:23:07,112 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 00:23:07,112 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:23:07,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -350754530, now seen corresponding path program 1 times [2023-08-30 00:23:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:07,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921182446] [2023-08-30 00:23:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:07,113 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 00:23:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:07,114 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 00:23:07,116 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 00:23:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:23:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:07,286 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:23:07,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 00:23:07,309 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:23:07,310 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 00:23:07,321 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 00:23:07,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:07,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:07,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921182446] [2023-08-30 00:23:07,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921182446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:07,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:07,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969231972] [2023-08-30 00:23:07,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:07,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:07,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:07,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 423 [2023-08-30 00:23:07,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 111 transitions, 1044 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:07,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:07,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 423 [2023-08-30 00:23:07,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:12,097 INFO L130 PetriNetUnfolder]: 28771/38896 cut-off events. [2023-08-30 00:23:12,097 INFO L131 PetriNetUnfolder]: For 105225/109127 co-relation queries the response was YES. [2023-08-30 00:23:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105227 conditions, 38896 events. 28771/38896 cut-off events. For 105225/109127 co-relation queries the response was YES. Maximal size of possible extension queue 1903. Compared 247013 event pairs, 15841 based on Foata normal form. 3430/22462 useless extension candidates. Maximal degree in co-relation 105190. Up to 38395 conditions per place. [2023-08-30 00:23:12,363 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 99 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-30 00:23:12,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 109 transitions, 1240 flow [2023-08-30 00:23:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-08-30 00:23:12,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-08-30 00:23:12,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-08-30 00:23:12,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-08-30 00:23:12,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:12,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-08-30 00:23:12,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:12,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:12,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:12,367 INFO L175 Difference]: Start difference. First operand has 129 places, 111 transitions, 1044 flow. Second operand 3 states and 549 transitions. [2023-08-30 00:23:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 109 transitions, 1240 flow [2023-08-30 00:23:12,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 109 transitions, 1219 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:23:12,412 INFO L231 Difference]: Finished difference. Result has 126 places, 109 transitions, 1021 flow [2023-08-30 00:23:12,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2023-08-30 00:23:12,413 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2023-08-30 00:23:12,413 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 1021 flow [2023-08-30 00:23:12,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:12,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:12,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:12,426 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 00:23:12,623 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 00:23:12,623 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:23:12,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -350754531, now seen corresponding path program 1 times [2023-08-30 00:23:12,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:12,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513943673] [2023-08-30 00:23:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:12,624 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 00:23:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:12,625 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 00:23:12,626 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 00:23:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:23:12,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:12,843 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2023-08-30 00:23:12,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 40 [2023-08-30 00:23:12,857 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 167 treesize of output 163 [2023-08-30 00:23:12,985 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:23:12,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:23:13,143 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 00:23:13,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:13,367 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 00:23:13,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513943673] [2023-08-30 00:23:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513943673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:13,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:23:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417989290] [2023-08-30 00:23:13,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:23:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:23:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:23:14,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 423 [2023-08-30 00:23:14,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 158.25) internal successors, (1266), 8 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:14,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:14,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 423 [2023-08-30 00:23:14,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:21,043 INFO L130 PetriNetUnfolder]: 26984/36644 cut-off events. [2023-08-30 00:23:21,043 INFO L131 PetriNetUnfolder]: For 100224/103930 co-relation queries the response was YES. [2023-08-30 00:23:21,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99580 conditions, 36644 events. 26984/36644 cut-off events. For 100224/103930 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 232087 event pairs, 14000 based on Foata normal form. 3232/22101 useless extension candidates. Maximal degree in co-relation 99542. Up to 31271 conditions per place. [2023-08-30 00:23:21,369 INFO L137 encePairwiseOnDemand]: 413/423 looper letters, 119 selfloop transitions, 44 changer transitions 0/172 dead transitions. [2023-08-30 00:23:21,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 172 transitions, 1594 flow [2023-08-30 00:23:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:23:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:23:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2299 transitions. [2023-08-30 00:23:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38821344140493075 [2023-08-30 00:23:21,373 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2299 transitions. [2023-08-30 00:23:21,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2299 transitions. [2023-08-30 00:23:21,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:21,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2299 transitions. [2023-08-30 00:23:21,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.21428571428572) internal successors, (2299), 14 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:21,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:21,378 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 423.0) internal successors, (6345), 15 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:21,378 INFO L175 Difference]: Start difference. First operand has 126 places, 109 transitions, 1021 flow. Second operand 14 states and 2299 transitions. [2023-08-30 00:23:21,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 172 transitions, 1594 flow [2023-08-30 00:23:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1593 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:21,420 INFO L231 Difference]: Finished difference. Result has 141 places, 109 transitions, 1153 flow [2023-08-30 00:23:21,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1153, PETRI_PLACES=141, PETRI_TRANSITIONS=109} [2023-08-30 00:23:21,421 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2023-08-30 00:23:21,421 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 109 transitions, 1153 flow [2023-08-30 00:23:21,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.25) internal successors, (1266), 8 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:21,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:21,421 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:23:21,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:21,628 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 00:23:21,629 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:23:21,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1089002116, now seen corresponding path program 2 times [2023-08-30 00:23:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:21,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468389987] [2023-08-30 00:23:21,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:23:21,630 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 00:23:21,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:21,631 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 00:23:21,634 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 00:23:21,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:23:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:23:21,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:23:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:21,805 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 00:23:21,805 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 00:23:21,817 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 42 treesize of output 38 [2023-08-30 00:23:21,928 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:23:21,929 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 00:23:22,122 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 00:23:22,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:22,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468389987] [2023-08-30 00:23:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468389987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:22,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:22,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:23:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619575102] [2023-08-30 00:23:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:23:22,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:23:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:23:24,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:23:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 423 [2023-08-30 00:23:24,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 109 transitions, 1153 flow. Second operand has 5 states, 5 states have (on average 169.4) internal successors, (847), 5 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 00:23:24,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:24,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 423 [2023-08-30 00:23:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand