./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/ldv-races/race-2_2-container_of.i --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/ldv-races/race-2_2-container_of.i -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 dbdd132d1a656eb04120c9309772a096548e218c86a32fc06dd93d5ae981c163 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 20:52:16,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:52:16,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:52:16,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:52:16,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:52:16,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:52:16,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:52:16,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:52:16,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:52:16,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:52:16,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:52:16,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:52:16,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:52:16,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:52:16,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:52:16,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:52:16,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:52:16,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:52:16,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:52:16,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:52:16,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:52:16,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:52:16,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:52:16,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:52:16,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:52:16,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:52:16,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:52:16,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:52:16,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:52:16,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:52:16,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:52:16,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:52:16,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:52:16,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:52:16,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:52:16,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:52:16,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:52:16,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:52:16,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:52:16,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:52:16,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:52:16,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 20:52:16,737 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:52:16,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:52:16,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:52:16,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:52:16,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:52:16,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:52:16,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:52:16,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:52:16,740 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:52:16,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:52:16,741 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:52:16,741 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:52:16,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:52:16,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:52:16,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:52:16,743 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:52:16,743 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:52:16,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:52:16,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:52:16,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:52:16,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:52:16,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:52:16,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:52:16,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 20:52:16,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 20:52:16,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:52:16,745 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:52:16,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:52:16,745 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:52:16,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdd132d1a656eb04120c9309772a096548e218c86a32fc06dd93d5ae981c163 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:52:17,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:52:17,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:52:17,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:52:17,061 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:52:17,062 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:52:17,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-2_2-container_of.i [2023-08-29 20:52:18,229 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:52:18,545 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:52:18,546 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i [2023-08-29 20:52:18,565 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c79ab3f8/51969dfba21041f78b45b785d5031034/FLAG3bd021479 [2023-08-29 20:52:18,590 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c79ab3f8/51969dfba21041f78b45b785d5031034 [2023-08-29 20:52:18,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:52:18,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:52:18,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:52:18,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:52:18,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:52:18,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:18" (1/1) ... [2023-08-29 20:52:18,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a887232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:18, skipping insertion in model container [2023-08-29 20:52:18,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:18" (1/1) ... [2023-08-29 20:52:18,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:52:18,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:52:18,827 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:52:19,381 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i[75002,75015] [2023-08-29 20:52:19,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:52:19,435 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 20:52:19,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31e21430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:19, skipping insertion in model container [2023-08-29 20:52:19,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:52:19,437 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 20:52:19,439 INFO L158 Benchmark]: Toolchain (without parser) took 844.19ms. Allocated memory is still 60.8MB. Free memory was 39.6MB in the beginning and 34.8MB in the end (delta: 4.7MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2023-08-29 20:52:19,439 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 20:52:19,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 840.79ms. Allocated memory is still 60.8MB. Free memory was 39.2MB in the beginning and 34.8MB in the end (delta: 4.4MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2023-08-29 20:52:19,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 28.5MB in the beginning and 28.5MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 840.79ms. Allocated memory is still 60.8MB. Free memory was 39.2MB in the beginning and 34.8MB in the end (delta: 4.4MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1691]: 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/ldv-races/race-2_2-container_of.i -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 dbdd132d1a656eb04120c9309772a096548e218c86a32fc06dd93d5ae981c163 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 20:52:21,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:52:21,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:52:21,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:52:21,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:52:21,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:52:21,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:52:21,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:52:21,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:52:21,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:52:21,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:52:21,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:52:21,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:52:21,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:52:21,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:52:21,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:52:21,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:52:21,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:52:21,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:52:21,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:52:21,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:52:21,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:52:21,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:52:21,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:52:21,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:52:21,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:52:21,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:52:21,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:52:21,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:52:21,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:52:21,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:52:21,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:52:21,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:52:21,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:52:21,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:52:21,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:52:21,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:52:21,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:52:21,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:52:21,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:52:21,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:52:21,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 20:52:21,253 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:52:21,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:52:21,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:52:21,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:52:21,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:52:21,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:52:21,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:52:21,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:52:21,256 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:52:21,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:52:21,257 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:52:21,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:52:21,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:52:21,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:52:21,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:52:21,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:52:21,258 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 20:52:21,259 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:52:21,260 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:52:21,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:52:21,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:52:21,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:52:21,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:52:21,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:52:21,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:52:21,261 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 20:52:21,261 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 20:52:21,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:52:21,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:52:21,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:52:21,262 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 20:52:21,262 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:52:21,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdd132d1a656eb04120c9309772a096548e218c86a32fc06dd93d5ae981c163 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:52:21,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:52:21,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:52:21,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:52:21,559 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:52:21,560 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:52:21,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-2_2-container_of.i [2023-08-29 20:52:22,824 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:52:23,092 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:52:23,093 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i [2023-08-29 20:52:23,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef343901e/8d98d75235c64eca9976df3e665e276b/FLAG9f8816cd6 [2023-08-29 20:52:23,122 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef343901e/8d98d75235c64eca9976df3e665e276b [2023-08-29 20:52:23,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:52:23,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:52:23,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:52:23,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:52:23,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:52:23,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:23" (1/1) ... [2023-08-29 20:52:23,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165372e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:23, skipping insertion in model container [2023-08-29 20:52:23,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:23" (1/1) ... [2023-08-29 20:52:23,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:52:23,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:52:23,301 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:52:23,864 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i[75002,75015] [2023-08-29 20:52:23,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:52:23,910 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 20:52:23,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:52:23,926 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:52:23,951 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i[75002,75015] [2023-08-29 20:52:23,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:52:23,966 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 20:52:23,975 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:52:24,019 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-2_2-container_of.i[75002,75015] [2023-08-29 20:52:24,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:52:24,136 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:52:24,136 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:52:24,136 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:52:24,142 INFO L208 MainTranslator]: Completed translation [2023-08-29 20:52:24,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24 WrapperNode [2023-08-29 20:52:24,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:52:24,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 20:52:24,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 20:52:24,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 20:52:24,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,204 INFO L138 Inliner]: procedures = 472, calls = 48, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 114 [2023-08-29 20:52:24,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 20:52:24,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 20:52:24,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 20:52:24,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 20:52:24,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 20:52:24,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 20:52:24,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 20:52:24,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 20:52:24,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (1/1) ... [2023-08-29 20:52:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:52:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:52:24,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 20:52:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 20:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 20:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 20:52:24,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 20:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 20:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure my_callback [2023-08-29 20:52:24,318 INFO L138 BoogieDeclarations]: Found implementation of procedure my_callback [2023-08-29 20:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 20:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 20:52:24,319 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 20:52:24,664 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 20:52:24,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 20:52:25,177 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 20:52:25,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 20:52:25,201 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-29 20:52:25,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:25 BoogieIcfgContainer [2023-08-29 20:52:25,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 20:52:25,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 20:52:25,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 20:52:25,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 20:52:25,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:52:23" (1/3) ... [2023-08-29 20:52:25,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b4351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:52:25, skipping insertion in model container [2023-08-29 20:52:25,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:24" (2/3) ... [2023-08-29 20:52:25,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b4351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:52:25, skipping insertion in model container [2023-08-29 20:52:25,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:25" (3/3) ... [2023-08-29 20:52:25,233 INFO L112 eAbstractionObserver]: Analyzing ICFG race-2_2-container_of.i [2023-08-29 20:52:25,246 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 20:52:25,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-08-29 20:52:25,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 20:52:25,356 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 20:52:25,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 394 flow [2023-08-29 20:52:25,515 INFO L130 PetriNetUnfolder]: 8/239 cut-off events. [2023-08-29 20:52:25,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:52:25,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 239 events. 8/239 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 621 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 127. Up to 4 conditions per place. [2023-08-29 20:52:25,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 189 transitions, 394 flow [2023-08-29 20:52:25,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 187 transitions, 386 flow [2023-08-29 20:52:25,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:52:25,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 187 transitions, 386 flow [2023-08-29 20:52:25,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 187 transitions, 386 flow [2023-08-29 20:52:25,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 187 transitions, 386 flow [2023-08-29 20:52:25,589 INFO L130 PetriNetUnfolder]: 8/239 cut-off events. [2023-08-29 20:52:25,590 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 20:52:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 239 events. 8/239 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 621 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 127. Up to 4 conditions per place. [2023-08-29 20:52:25,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 4576 [2023-08-29 20:53:51,216 WARN L222 SmtUtils]: Spent 23.96s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:54:09,560 WARN L222 SmtUtils]: Spent 18.34s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:54:35,736 WARN L222 SmtUtils]: Spent 26.17s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:54:59,108 WARN L222 SmtUtils]: Spent 23.37s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:55:22,561 WARN L222 SmtUtils]: Spent 10.98s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:55:32,899 WARN L222 SmtUtils]: Spent 10.34s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:55:42,055 WARN L222 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:55:51,496 WARN L222 SmtUtils]: Spent 9.44s on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:57:28,367 WARN L222 SmtUtils]: Spent 1.61m on a formula simplification. DAG size of input: 253 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 20:58:15,478 WARN L222 SmtUtils]: Spent 47.11s on a formula simplification that was a NOOP. DAG size: 242 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:00:15,032 WARN L222 SmtUtils]: Spent 1.99m on a formula simplification. DAG size of input: 253 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:01:16,743 WARN L222 SmtUtils]: Spent 1.03m on a formula simplification that was a NOOP. DAG size: 242 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 21:01:16,758 INFO L134 LiptonReduction]: Checked pairs total: 15254 [2023-08-29 21:01:16,761 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-29 21:01:16,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:01:16,782 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;@7a1b4088, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:01:16,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-08-29 21:01:16,784 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 21:01:16,784 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:01:16,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:16,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 21:01:16,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:16,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash 666, now seen corresponding path program 1 times [2023-08-29 21:01:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117497765] [2023-08-29 21:01:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:16,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:16,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 21:01:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 21:01:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:16,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:16,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:16,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117497765] [2023-08-29 21:01:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117497765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:16,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:16,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 21:01:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225099295] [2023-08-29 21:01:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:16,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:01:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:01:16,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:01:16,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-29 21:01:16,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:16,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:16,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-29 21:01:16,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:18,610 INFO L130 PetriNetUnfolder]: 1091/2124 cut-off events. [2023-08-29 21:01:18,611 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 21:01:18,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 2124 events. 1091/2124 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14372 event pairs, 1090 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 3776. Up to 1818 conditions per place. [2023-08-29 21:01:18,629 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 46 selfloop transitions, 0 changer transitions 0/61 dead transitions. [2023-08-29 21:01:18,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 226 flow [2023-08-29 21:01:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:01:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:01:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 408 transitions. [2023-08-29 21:01:18,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062034739454094 [2023-08-29 21:01:18,652 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 408 transitions. [2023-08-29 21:01:18,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 408 transitions. [2023-08-29 21:01:18,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:18,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 408 transitions. [2023-08-29 21:01:18,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 204.0) internal successors, (408), 2 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,672 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,674 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 2 states and 408 transitions. [2023-08-29 21:01:18,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 226 flow [2023-08-29 21:01:18,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:01:18,682 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 126 flow [2023-08-29 21:01:18,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-29 21:01:18,687 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2023-08-29 21:01:18,687 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 126 flow [2023-08-29 21:01:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:18,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:01:18,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 21:01:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:18,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:18,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 21095, now seen corresponding path program 1 times [2023-08-29 21:01:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147812645] [2023-08-29 21:01:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:18,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:18,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 21:01:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:01:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:19,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:19,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147812645] [2023-08-29 21:01:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147812645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57369264] [2023-08-29 21:01:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:19,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-29 21:01:19,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:19,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-29 21:01:19,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:21,773 INFO L130 PetriNetUnfolder]: 1090/1990 cut-off events. [2023-08-29 21:01:21,774 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:01:21,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 1990 events. 1090/1990 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11308 event pairs, 1090 based on Foata normal form. 0/1144 useless extension candidates. Maximal degree in co-relation 3823. Up to 1813 conditions per place. [2023-08-29 21:01:21,785 INFO L137 encePairwiseOnDemand]: 399/403 looper letters, 57 selfloop transitions, 1 changer transitions 1/74 dead transitions. [2023-08-29 21:01:21,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 270 flow [2023-08-29 21:01:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-29 21:01:21,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47559966914805624 [2023-08-29 21:01:21,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-29 21:01:21,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-29 21:01:21,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:21,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-29 21:01:21,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,799 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 126 flow. Second operand 3 states and 575 transitions. [2023-08-29 21:01:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 270 flow [2023-08-29 21:01:21,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:21,802 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 135 flow [2023-08-29 21:01:21,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-29 21:01:21,803 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -10 predicate places. [2023-08-29 21:01:21,803 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 135 flow [2023-08-29 21:01:21,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:21,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:21,816 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 [2023-08-29 21:01:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:22,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:22,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash 652141, now seen corresponding path program 1 times [2023-08-29 21:01:22,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:22,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909725494] [2023-08-29 21:01:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:22,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:22,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:22,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:22,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 21:01:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:01:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:22,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:01:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:22,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:22,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909725494] [2023-08-29 21:01:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909725494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:22,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:22,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425902600] [2023-08-29 21:01:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:22,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 403 [2023-08-29 21:01:22,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:22,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:22,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 403 [2023-08-29 21:01:22,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:23,862 INFO L130 PetriNetUnfolder]: 850/1682 cut-off events. [2023-08-29 21:01:23,862 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 21:01:23,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3241 conditions, 1682 events. 850/1682 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10437 event pairs, 525 based on Foata normal form. 37/1075 useless extension candidates. Maximal degree in co-relation 3236. Up to 882 conditions per place. [2023-08-29 21:01:23,872 INFO L137 encePairwiseOnDemand]: 393/403 looper letters, 57 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2023-08-29 21:01:23,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 295 flow [2023-08-29 21:01:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-08-29 21:01:23,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46484698097601324 [2023-08-29 21:01:23,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-08-29 21:01:23,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-08-29 21:01:23,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:23,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-08-29 21:01:23,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,881 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 135 flow. Second operand 3 states and 562 transitions. [2023-08-29 21:01:23,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 295 flow [2023-08-29 21:01:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:23,884 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 164 flow [2023-08-29 21:01:23,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-29 21:01:23,885 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -8 predicate places. [2023-08-29 21:01:23,885 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 164 flow [2023-08-29 21:01:23,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:23,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:23,901 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 [2023-08-29 21:01:24,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:24,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:24,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash 652065, now seen corresponding path program 1 times [2023-08-29 21:01:24,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919635910] [2023-08-29 21:01:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:24,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:24,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:24,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 21:01:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:01:24,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:24,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:01:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:24,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:24,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:24,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919635910] [2023-08-29 21:01:24,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919635910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:24,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:24,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:24,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540863092] [2023-08-29 21:01:24,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:24,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:24,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 403 [2023-08-29 21:01:24,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:24,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 403 [2023-08-29 21:01:24,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:26,060 INFO L130 PetriNetUnfolder]: 850/1624 cut-off events. [2023-08-29 21:01:26,061 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-29 21:01:26,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 1624 events. 850/1624 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9398 event pairs, 730 based on Foata normal form. 0/1032 useless extension candidates. Maximal degree in co-relation 3475. Up to 1240 conditions per place. [2023-08-29 21:01:26,069 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 51 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2023-08-29 21:01:26,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 296 flow [2023-08-29 21:01:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-29 21:01:26,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392059553349876 [2023-08-29 21:01:26,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-29 21:01:26,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-29 21:01:26,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:26,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-29 21:01:26,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,078 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 164 flow. Second operand 3 states and 531 transitions. [2023-08-29 21:01:26,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 296 flow [2023-08-29 21:01:26,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:26,081 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 168 flow [2023-08-29 21:01:26,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-29 21:01:26,083 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -8 predicate places. [2023-08-29 21:01:26,083 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 168 flow [2023-08-29 21:01:26,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:26,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:26,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:26,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:26,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting my_callbackErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:26,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 655561, now seen corresponding path program 1 times [2023-08-29 21:01:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:26,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597925461] [2023-08-29 21:01:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:26,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:26,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:26,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 21:01:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:01:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:26,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:01:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:26,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:26,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597925461] [2023-08-29 21:01:26,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597925461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:26,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:26,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:26,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588336164] [2023-08-29 21:01:26,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:26,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:26,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:26,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:26,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:27,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-29 21:01:27,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 168 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) [2023-08-29 21:01:27,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:27,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-29 21:01:27,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:29,093 INFO L130 PetriNetUnfolder]: 701/1406 cut-off events. [2023-08-29 21:01:29,093 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-29 21:01:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 1406 events. 701/1406 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7869 event pairs, 557 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2884. Up to 932 conditions per place. [2023-08-29 21:01:29,101 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 63 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-29 21:01:29,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 380 flow [2023-08-29 21:01:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:01:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:01:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 931 transitions. [2023-08-29 21:01:29,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620347394540943 [2023-08-29 21:01:29,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 931 transitions. [2023-08-29 21:01:29,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 931 transitions. [2023-08-29 21:01:29,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:29,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 931 transitions. [2023-08-29 21:01:29,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.2) internal successors, (931), 5 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,113 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 168 flow. Second operand 5 states and 931 transitions. [2023-08-29 21:01:29,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 380 flow [2023-08-29 21:01:29,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:29,120 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 209 flow [2023-08-29 21:01:29,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-08-29 21:01:29,123 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-29 21:01:29,123 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 209 flow [2023-08-29 21:01:29,124 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) [2023-08-29 21:01:29,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:29,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:29,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:29,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:29,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 655563, now seen corresponding path program 1 times [2023-08-29 21:01:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621442] [2023-08-29 21:01:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:29,337 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 [2023-08-29 21:01:29,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:29,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:29,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 21:01:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 21:01:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:29,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:01:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:29,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:29,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:29,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621442] [2023-08-29 21:01:29,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:29,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:29,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829623639] [2023-08-29 21:01:29,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:29,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:29,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:29,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 403 [2023-08-29 21:01:29,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:29,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 403 [2023-08-29 21:01:29,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:31,860 INFO L130 PetriNetUnfolder]: 575/1205 cut-off events. [2023-08-29 21:01:31,861 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2023-08-29 21:01:31,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 1205 events. 575/1205 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6800 event pairs, 421 based on Foata normal form. 64/956 useless extension candidates. Maximal degree in co-relation 2586. Up to 725 conditions per place. [2023-08-29 21:01:31,866 INFO L137 encePairwiseOnDemand]: 396/403 looper letters, 61 selfloop transitions, 6 changer transitions 2/84 dead transitions. [2023-08-29 21:01:31,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 391 flow [2023-08-29 21:01:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-29 21:01:31,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696029776674938 [2023-08-29 21:01:31,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-29 21:01:31,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-29 21:01:31,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:31,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-29 21:01:31,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:31,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:31,874 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:31,874 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 209 flow. Second operand 4 states and 757 transitions. [2023-08-29 21:01:31,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 391 flow [2023-08-29 21:01:31,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:31,877 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 227 flow [2023-08-29 21:01:31,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-08-29 21:01:31,878 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 0 predicate places. [2023-08-29 21:01:31,878 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 227 flow [2023-08-29 21:01:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:31,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:31,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:31,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:32,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:32,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 655568, now seen corresponding path program 1 times [2023-08-29 21:01:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:32,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201326628] [2023-08-29 21:01:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:32,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:32,097 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:32,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 21:01:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 21:01:32,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:01:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:01:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:32,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:32,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:32,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201326628] [2023-08-29 21:01:32,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201326628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:32,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:32,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570075255] [2023-08-29 21:01:32,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:32,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:32,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 403 [2023-08-29 21:01:32,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:32,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:32,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 403 [2023-08-29 21:01:32,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:33,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:01:34,110 INFO L130 PetriNetUnfolder]: 567/1213 cut-off events. [2023-08-29 21:01:34,110 INFO L131 PetriNetUnfolder]: For 299/299 co-relation queries the response was YES. [2023-08-29 21:01:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2749 conditions, 1213 events. 567/1213 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7261 event pairs, 567 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2740. Up to 1009 conditions per place. [2023-08-29 21:01:34,117 INFO L137 encePairwiseOnDemand]: 399/403 looper letters, 44 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-29 21:01:34,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 315 flow [2023-08-29 21:01:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-29 21:01:34,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640198511166253 [2023-08-29 21:01:34,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-29 21:01:34,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-29 21:01:34,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:34,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-29 21:01:34,125 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) [2023-08-29 21:01:34,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:34,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:34,127 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 227 flow. Second operand 3 states and 561 transitions. [2023-08-29 21:01:34,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 315 flow [2023-08-29 21:01:34,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 61 transitions, 300 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 21:01:34,132 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 212 flow [2023-08-29 21:01:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-08-29 21:01:34,133 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2023-08-29 21:01:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 212 flow [2023-08-29 21:01:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:34,149 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 [2023-08-29 21:01:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:34,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:34,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash 655566, now seen corresponding path program 1 times [2023-08-29 21:01:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699939476] [2023-08-29 21:01:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:34,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:34,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 21:01:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 21:01:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:34,534 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 21:01:34,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 21:01:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:34,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:34,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699939476] [2023-08-29 21:01:34,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699939476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:34,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:34,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:34,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875113963] [2023-08-29 21:01:34,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:34,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:34,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:34,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-29 21:01:34,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:34,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:34,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-29 21:01:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:35,937 INFO L130 PetriNetUnfolder]: 559/1191 cut-off events. [2023-08-29 21:01:35,937 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-29 21:01:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2563 conditions, 1191 events. 559/1191 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7058 event pairs, 455 based on Foata normal form. 0/881 useless extension candidates. Maximal degree in co-relation 2555. Up to 748 conditions per place. [2023-08-29 21:01:35,944 INFO L137 encePairwiseOnDemand]: 392/403 looper letters, 46 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-08-29 21:01:35,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 344 flow [2023-08-29 21:01:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-29 21:01:35,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47146401985111663 [2023-08-29 21:01:35,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-29 21:01:35,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-29 21:01:35,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:35,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-29 21:01:35,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:35,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:35,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:35,951 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 212 flow. Second operand 3 states and 570 transitions. [2023-08-29 21:01:35,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 344 flow [2023-08-29 21:01:35,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:35,954 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 226 flow [2023-08-29 21:01:35,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2023-08-29 21:01:35,954 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-29 21:01:35,955 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 226 flow [2023-08-29 21:01:35,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:35,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:35,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:01:35,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:36,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting my_callbackErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:36,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 20322818, now seen corresponding path program 1 times [2023-08-29 21:01:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709892943] [2023-08-29 21:01:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:36,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:36,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:36,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:36,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 21:01:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:01:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:36,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:01:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:36,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:36,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:36,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709892943] [2023-08-29 21:01:36,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709892943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:36,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:36,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573273114] [2023-08-29 21:01:36,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:01:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:01:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:01:36,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 403 [2023-08-29 21:01:36,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:36,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:36,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 403 [2023-08-29 21:01:36,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:39,226 INFO L130 PetriNetUnfolder]: 611/1322 cut-off events. [2023-08-29 21:01:39,226 INFO L131 PetriNetUnfolder]: For 349/349 co-relation queries the response was YES. [2023-08-29 21:01:39,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1322 events. 611/1322 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8451 event pairs, 68 based on Foata normal form. 0/1033 useless extension candidates. Maximal degree in co-relation 2819. Up to 622 conditions per place. [2023-08-29 21:01:39,232 INFO L137 encePairwiseOnDemand]: 387/403 looper letters, 80 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2023-08-29 21:01:39,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 543 flow [2023-08-29 21:01:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:01:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:01:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1250 transitions. [2023-08-29 21:01:39,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44310528181495923 [2023-08-29 21:01:39,237 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1250 transitions. [2023-08-29 21:01:39,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1250 transitions. [2023-08-29 21:01:39,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:39,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1250 transitions. [2023-08-29 21:01:39,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:39,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:39,244 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:39,244 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 226 flow. Second operand 7 states and 1250 transitions. [2023-08-29 21:01:39,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 543 flow [2023-08-29 21:01:39,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 521 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:39,247 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 292 flow [2023-08-29 21:01:39,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-08-29 21:01:39,248 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-08-29 21:01:39,248 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 292 flow [2023-08-29 21:01:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:39,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:39,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:01:39,261 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 (10)] Ended with exit code 0 [2023-08-29 21:01:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:39,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:39,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 20322819, now seen corresponding path program 1 times [2023-08-29 21:01:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215784926] [2023-08-29 21:01:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:39,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:39,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:39,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 21:01:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 21:01:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:39,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:01:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:39,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:39,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215784926] [2023-08-29 21:01:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215784926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454629796] [2023-08-29 21:01:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:39,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:01:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:01:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:01:40,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 403 [2023-08-29 21:01:40,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:40,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:40,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 403 [2023-08-29 21:01:40,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:44,436 INFO L130 PetriNetUnfolder]: 609/1191 cut-off events. [2023-08-29 21:01:44,437 INFO L131 PetriNetUnfolder]: For 989/989 co-relation queries the response was YES. [2023-08-29 21:01:44,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 1191 events. 609/1191 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6633 event pairs, 105 based on Foata normal form. 160/1082 useless extension candidates. Maximal degree in co-relation 3085. Up to 648 conditions per place. [2023-08-29 21:01:44,442 INFO L137 encePairwiseOnDemand]: 393/403 looper letters, 74 selfloop transitions, 12 changer transitions 2/101 dead transitions. [2023-08-29 21:01:44,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 101 transitions, 568 flow [2023-08-29 21:01:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:01:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:01:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 922 transitions. [2023-08-29 21:01:44,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575682382133995 [2023-08-29 21:01:44,446 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 922 transitions. [2023-08-29 21:01:44,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 922 transitions. [2023-08-29 21:01:44,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:44,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 922 transitions. [2023-08-29 21:01:44,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.4) internal successors, (922), 5 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:44,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:44,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:44,452 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 292 flow. Second operand 5 states and 922 transitions. [2023-08-29 21:01:44,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 101 transitions, 568 flow [2023-08-29 21:01:44,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 527 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 21:01:44,456 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 319 flow [2023-08-29 21:01:44,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-08-29 21:01:44,457 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-08-29 21:01:44,457 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 319 flow [2023-08-29 21:01:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:44,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:44,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:01:44,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:44,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:44,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash 626645403, now seen corresponding path program 1 times [2023-08-29 21:01:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:44,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824396064] [2023-08-29 21:01:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:44,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:44,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 21:01:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 21:01:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:44,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 45 [2023-08-29 21:01:44,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:01:44,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 93 [2023-08-29 21:01:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:45,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:45,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824396064] [2023-08-29 21:01:45,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824396064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:45,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849589743] [2023-08-29 21:01:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:45,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:45,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 403 [2023-08-29 21:01:45,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:45,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:45,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 403 [2023-08-29 21:01:45,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:47,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:01:48,024 INFO L130 PetriNetUnfolder]: 701/1444 cut-off events. [2023-08-29 21:01:48,025 INFO L131 PetriNetUnfolder]: For 1391/1394 co-relation queries the response was YES. [2023-08-29 21:01:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1444 events. 701/1444 cut-off events. For 1391/1394 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9114 event pairs, 440 based on Foata normal form. 0/1105 useless extension candidates. Maximal degree in co-relation 3846. Up to 1037 conditions per place. [2023-08-29 21:01:48,032 INFO L137 encePairwiseOnDemand]: 394/403 looper letters, 53 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-08-29 21:01:48,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 497 flow [2023-08-29 21:01:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-29 21:01:48,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441687344913151 [2023-08-29 21:01:48,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-29 21:01:48,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-29 21:01:48,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:48,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-29 21:01:48,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:48,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:48,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:48,040 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 319 flow. Second operand 3 states and 537 transitions. [2023-08-29 21:01:48,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 497 flow [2023-08-29 21:01:48,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 472 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:01:48,044 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 390 flow [2023-08-29 21:01:48,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=390, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-08-29 21:01:48,045 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-08-29 21:01:48,045 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 390 flow [2023-08-29 21:01:48,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:48,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:48,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:01:48,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:48,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:48,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting my_callbackErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:48,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 630013587, now seen corresponding path program 1 times [2023-08-29 21:01:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668947323] [2023-08-29 21:01:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:48,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:48,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:48,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:48,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 21:01:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:48,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:01:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:48,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:01:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:48,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:48,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:48,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668947323] [2023-08-29 21:01:48,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668947323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:48,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:48,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:48,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279118587] [2023-08-29 21:01:48,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:48,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-29 21:01:48,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:48,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:48,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-29 21:01:48,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:51,028 INFO L130 PetriNetUnfolder]: 652/1426 cut-off events. [2023-08-29 21:01:51,028 INFO L131 PetriNetUnfolder]: For 1667/1673 co-relation queries the response was YES. [2023-08-29 21:01:51,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 1426 events. 652/1426 cut-off events. For 1667/1673 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9051 event pairs, 248 based on Foata normal form. 0/1246 useless extension candidates. Maximal degree in co-relation 4273. Up to 756 conditions per place. [2023-08-29 21:01:51,035 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 70 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2023-08-29 21:01:51,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 679 flow [2023-08-29 21:01:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:01:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:01:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 925 transitions. [2023-08-29 21:01:51,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45905707196029777 [2023-08-29 21:01:51,039 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 925 transitions. [2023-08-29 21:01:51,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 925 transitions. [2023-08-29 21:01:51,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:51,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 925 transitions. [2023-08-29 21:01:51,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:51,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:51,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:51,045 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 390 flow. Second operand 5 states and 925 transitions. [2023-08-29 21:01:51,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 679 flow [2023-08-29 21:01:51,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 100 transitions, 653 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:51,051 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 431 flow [2023-08-29 21:01:51,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=431, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-29 21:01:51,052 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-08-29 21:01:51,052 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 431 flow [2023-08-29 21:01:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:51,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:51,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:01:51,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:51,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:51,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 630013589, now seen corresponding path program 1 times [2023-08-29 21:01:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024820638] [2023-08-29 21:01:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:51,266 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:51,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 21:01:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:51,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 21:01:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:51,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:01:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:51,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:51,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024820638] [2023-08-29 21:01:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024820638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:51,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062371688] [2023-08-29 21:01:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:51,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:51,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 403 [2023-08-29 21:01:51,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:51,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:51,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 403 [2023-08-29 21:01:51,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:54,069 INFO L130 PetriNetUnfolder]: 542/1229 cut-off events. [2023-08-29 21:01:54,070 INFO L131 PetriNetUnfolder]: For 1659/1666 co-relation queries the response was YES. [2023-08-29 21:01:54,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 1229 events. 542/1229 cut-off events. For 1659/1666 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7824 event pairs, 236 based on Foata normal form. 63/1136 useless extension candidates. Maximal degree in co-relation 3764. Up to 781 conditions per place. [2023-08-29 21:01:54,076 INFO L137 encePairwiseOnDemand]: 396/403 looper letters, 67 selfloop transitions, 9 changer transitions 2/93 dead transitions. [2023-08-29 21:01:54,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 659 flow [2023-08-29 21:01:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-08-29 21:01:54,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665012406947891 [2023-08-29 21:01:54,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-08-29 21:01:54,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-08-29 21:01:54,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:54,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-08-29 21:01:54,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:54,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:54,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:54,084 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 431 flow. Second operand 4 states and 752 transitions. [2023-08-29 21:01:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 659 flow [2023-08-29 21:01:54,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 93 transitions, 655 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:54,088 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 454 flow [2023-08-29 21:01:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-29 21:01:54,089 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-08-29 21:01:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 454 flow [2023-08-29 21:01:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:01:54,104 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 (14)] Ended with exit code 0 [2023-08-29 21:01:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:54,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:54,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2048827609, now seen corresponding path program 1 times [2023-08-29 21:01:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402627452] [2023-08-29 21:01:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:54,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:54,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:54,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 21:01:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 21:01:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:54,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:01:54,520 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:01:54,520 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:01:54,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 41 [2023-08-29 21:01:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:54,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:54,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402627452] [2023-08-29 21:01:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402627452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484472262] [2023-08-29 21:01:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:54,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:54,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 403 [2023-08-29 21:01:54,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:54,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:54,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 403 [2023-08-29 21:01:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:56,900 INFO L130 PetriNetUnfolder]: 674/1476 cut-off events. [2023-08-29 21:01:56,900 INFO L131 PetriNetUnfolder]: For 2205/2214 co-relation queries the response was YES. [2023-08-29 21:01:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1476 events. 674/1476 cut-off events. For 2205/2214 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9694 event pairs, 393 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 4670. Up to 1057 conditions per place. [2023-08-29 21:01:56,907 INFO L137 encePairwiseOnDemand]: 394/403 looper letters, 58 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2023-08-29 21:01:56,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 699 flow [2023-08-29 21:01:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-29 21:01:56,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44334160463192723 [2023-08-29 21:01:56,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-29 21:01:56,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-29 21:01:56,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:56,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-29 21:01:56,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:56,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:56,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:56,914 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 454 flow. Second operand 3 states and 536 transitions. [2023-08-29 21:01:56,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 699 flow [2023-08-29 21:01:56,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 688 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:56,919 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 616 flow [2023-08-29 21:01:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=616, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-08-29 21:01:56,920 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 15 predicate places. [2023-08-29 21:01:56,920 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 616 flow [2023-08-29 21:01:56,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:56,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:56,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:01:56,934 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 [2023-08-29 21:01:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:57,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:57,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1944415515, now seen corresponding path program 1 times [2023-08-29 21:01:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827089882] [2023-08-29 21:01:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:57,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:57,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:57,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:57,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 21:01:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 21:01:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:57,364 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 21:01:57,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 21:01:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:57,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:57,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827089882] [2023-08-29 21:01:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827089882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:57,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83841543] [2023-08-29 21:01:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:57,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:57,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 403 [2023-08-29 21:01:57,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:57,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:57,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 403 [2023-08-29 21:01:57,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:58,789 INFO L130 PetriNetUnfolder]: 627/1407 cut-off events. [2023-08-29 21:01:58,789 INFO L131 PetriNetUnfolder]: For 3173/3179 co-relation queries the response was YES. [2023-08-29 21:01:58,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5048 conditions, 1407 events. 627/1407 cut-off events. For 3173/3179 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9310 event pairs, 359 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 5030. Up to 755 conditions per place. [2023-08-29 21:01:58,794 INFO L137 encePairwiseOnDemand]: 393/403 looper letters, 60 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2023-08-29 21:01:58,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 780 flow [2023-08-29 21:01:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-29 21:01:58,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665012406947891 [2023-08-29 21:01:58,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-29 21:01:58,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-29 21:01:58,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:58,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-29 21:01:58,798 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) [2023-08-29 21:01:58,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:58,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:58,800 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 616 flow. Second operand 3 states and 564 transitions. [2023-08-29 21:01:58,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 780 flow [2023-08-29 21:01:58,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 746 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:58,806 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 594 flow [2023-08-29 21:01:58,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2023-08-29 21:01:58,807 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-08-29 21:01:58,807 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 594 flow [2023-08-29 21:01:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:58,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:58,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:01:58,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:59,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:59,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:01:59,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1944415516, now seen corresponding path program 1 times [2023-08-29 21:01:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:01:59,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476847426] [2023-08-29 21:01:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:59,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:01:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:01:59,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:01:59,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 21:01:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:01:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:01:59,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:01:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:59,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:01:59,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:01:59,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476847426] [2023-08-29 21:01:59,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476847426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:59,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:59,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:59,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788500921] [2023-08-29 21:01:59,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:59,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:01:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 403 [2023-08-29 21:01:59,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 594 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) [2023-08-29 21:01:59,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:59,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 403 [2023-08-29 21:01:59,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:00,499 INFO L130 PetriNetUnfolder]: 596/1345 cut-off events. [2023-08-29 21:02:00,499 INFO L131 PetriNetUnfolder]: For 3048/3055 co-relation queries the response was YES. [2023-08-29 21:02:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4662 conditions, 1345 events. 596/1345 cut-off events. For 3048/3055 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8900 event pairs, 373 based on Foata normal form. 0/1174 useless extension candidates. Maximal degree in co-relation 4644. Up to 1074 conditions per place. [2023-08-29 21:02:00,505 INFO L137 encePairwiseOnDemand]: 400/403 looper letters, 64 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-29 21:02:00,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 708 flow [2023-08-29 21:02:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:02:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:02:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-29 21:02:00,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598842018196857 [2023-08-29 21:02:00,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-29 21:02:00,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-29 21:02:00,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:00,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-29 21:02:00,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:00,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:00,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:00,515 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 594 flow. Second operand 3 states and 556 transitions. [2023-08-29 21:02:00,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 708 flow [2023-08-29 21:02:00,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 678 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:02:00,521 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 550 flow [2023-08-29 21:02:00,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=550, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2023-08-29 21:02:00,522 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-08-29 21:02:00,522 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 550 flow [2023-08-29 21:02:00,522 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) [2023-08-29 21:02:00,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:00,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:02:00,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:00,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:00,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting my_callbackErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:00,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1944414840, now seen corresponding path program 1 times [2023-08-29 21:02:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:00,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828168613] [2023-08-29 21:02:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:00,738 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:00,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 21:02:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 21:02:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:00,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:00,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828168613] [2023-08-29 21:02:00,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828168613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:00,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:00,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:02:00,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701819388] [2023-08-29 21:02:00,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:00,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:02:00,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:02:00,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:02:01,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 403 [2023-08-29 21:02:01,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:01,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:01,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 403 [2023-08-29 21:02:01,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:03,223 INFO L130 PetriNetUnfolder]: 672/1434 cut-off events. [2023-08-29 21:02:03,224 INFO L131 PetriNetUnfolder]: For 2899/2911 co-relation queries the response was YES. [2023-08-29 21:02:03,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1434 events. 672/1434 cut-off events. For 2899/2911 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9244 event pairs, 163 based on Foata normal form. 112/1458 useless extension candidates. Maximal degree in co-relation 5033. Up to 807 conditions per place. [2023-08-29 21:02:03,230 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 84 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-29 21:02:03,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1003 flow [2023-08-29 21:02:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:02:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:02:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-29 21:02:03,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640198511166253 [2023-08-29 21:02:03,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-29 21:02:03,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-29 21:02:03,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:03,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-29 21:02:03,252 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) [2023-08-29 21:02:03,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:03,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:03,254 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 550 flow. Second operand 3 states and 561 transitions. [2023-08-29 21:02:03,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1003 flow [2023-08-29 21:02:03,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 116 transitions, 1001 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:02:03,260 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 715 flow [2023-08-29 21:02:03,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=715, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-08-29 21:02:03,261 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2023-08-29 21:02:03,261 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 715 flow [2023-08-29 21:02:03,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:03,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:03,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:02:03,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:03,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:03,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:03,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1944414839, now seen corresponding path program 1 times [2023-08-29 21:02:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:03,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852287418] [2023-08-29 21:02:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:03,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:03,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:03,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 21:02:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 21:02:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:03,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:03,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:03,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852287418] [2023-08-29 21:02:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852287418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:03,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:02:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947885063] [2023-08-29 21:02:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:02:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:02:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:02:04,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 403 [2023-08-29 21:02:04,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 715 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:04,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:04,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 403 [2023-08-29 21:02:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:06,992 INFO L130 PetriNetUnfolder]: 638/1268 cut-off events. [2023-08-29 21:02:06,992 INFO L131 PetriNetUnfolder]: For 4144/4172 co-relation queries the response was YES. [2023-08-29 21:02:06,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1268 events. 638/1268 cut-off events. For 4144/4172 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7259 event pairs, 125 based on Foata normal form. 228/1425 useless extension candidates. Maximal degree in co-relation 5291. Up to 901 conditions per place. [2023-08-29 21:02:06,997 INFO L137 encePairwiseOnDemand]: 395/403 looper letters, 100 selfloop transitions, 13 changer transitions 2/128 dead transitions. [2023-08-29 21:02:06,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1188 flow [2023-08-29 21:02:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:02:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:02:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 912 transitions. [2023-08-29 21:02:06,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45260545905707195 [2023-08-29 21:02:06,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 912 transitions. [2023-08-29 21:02:07,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 912 transitions. [2023-08-29 21:02:07,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:07,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 912 transitions. [2023-08-29 21:02:07,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.4) internal successors, (912), 5 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:07,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:07,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 403.0) internal successors, (2418), 6 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:07,015 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 715 flow. Second operand 5 states and 912 transitions. [2023-08-29 21:02:07,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1188 flow [2023-08-29 21:02:07,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:02:07,022 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 754 flow [2023-08-29 21:02:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=754, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-08-29 21:02:07,022 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-08-29 21:02:07,022 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 754 flow [2023-08-29 21:02:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:07,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:07,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:07,035 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 (19)] Ended with exit code 0 [2023-08-29 21:02:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:07,235 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:07,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -147338319, now seen corresponding path program 1 times [2023-08-29 21:02:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:07,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58857467] [2023-08-29 21:02:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:07,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:07,237 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 21:02:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:02:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:07,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:07,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:07,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:02:07,532 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:07,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:07,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:07,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58857467] [2023-08-29 21:02:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58857467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:07,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:02:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908684720] [2023-08-29 21:02:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:02:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:02:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:02:08,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-29 21:02:08,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 754 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:08,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:08,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-29 21:02:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:10,279 INFO L130 PetriNetUnfolder]: 620/1236 cut-off events. [2023-08-29 21:02:10,279 INFO L131 PetriNetUnfolder]: For 4282/4308 co-relation queries the response was YES. [2023-08-29 21:02:10,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5290 conditions, 1236 events. 620/1236 cut-off events. For 4282/4308 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6979 event pairs, 300 based on Foata normal form. 5/1170 useless extension candidates. Maximal degree in co-relation 5269. Up to 684 conditions per place. [2023-08-29 21:02:10,284 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 72 selfloop transitions, 21 changer transitions 1/109 dead transitions. [2023-08-29 21:02:10,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 1043 flow [2023-08-29 21:02:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:02:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:02:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1082 transitions. [2023-08-29 21:02:10,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44747725392886684 [2023-08-29 21:02:10,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1082 transitions. [2023-08-29 21:02:10,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1082 transitions. [2023-08-29 21:02:10,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:10,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1082 transitions. [2023-08-29 21:02:10,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:10,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:10,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:10,293 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 754 flow. Second operand 6 states and 1082 transitions. [2023-08-29 21:02:10,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 1043 flow [2023-08-29 21:02:10,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 1024 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:02:10,299 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 771 flow [2023-08-29 21:02:10,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2023-08-29 21:02:10,299 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-08-29 21:02:10,300 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 771 flow [2023-08-29 21:02:10,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:10,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:10,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:10,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:10,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:10,513 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:10,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -147338294, now seen corresponding path program 1 times [2023-08-29 21:02:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:10,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410373280] [2023-08-29 21:02:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:10,514 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 21:02:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:02:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:10,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:10,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:10,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:02:10,822 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:10,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:10,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:10,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410373280] [2023-08-29 21:02:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410373280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:02:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863228299] [2023-08-29 21:02:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:02:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:02:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:02:11,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-29 21:02:11,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 771 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:11,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:11,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-29 21:02:11,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:13,802 INFO L130 PetriNetUnfolder]: 614/1223 cut-off events. [2023-08-29 21:02:13,802 INFO L131 PetriNetUnfolder]: For 4563/4589 co-relation queries the response was YES. [2023-08-29 21:02:13,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5288 conditions, 1223 events. 614/1223 cut-off events. For 4563/4589 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6874 event pairs, 173 based on Foata normal form. 7/1159 useless extension candidates. Maximal degree in co-relation 5268. Up to 660 conditions per place. [2023-08-29 21:02:13,807 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 74 selfloop transitions, 21 changer transitions 1/111 dead transitions. [2023-08-29 21:02:13,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 1088 flow [2023-08-29 21:02:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:02:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:02:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1084 transitions. [2023-08-29 21:02:13,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44830438378825477 [2023-08-29 21:02:13,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1084 transitions. [2023-08-29 21:02:13,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1084 transitions. [2023-08-29 21:02:13,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:13,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1084 transitions. [2023-08-29 21:02:13,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.66666666666666) internal successors, (1084), 6 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:13,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:13,816 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 403.0) internal successors, (2821), 7 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:13,816 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 771 flow. Second operand 6 states and 1084 transitions. [2023-08-29 21:02:13,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 1088 flow [2023-08-29 21:02:13,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 1059 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:02:13,823 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 780 flow [2023-08-29 21:02:13,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2023-08-29 21:02:13,823 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-08-29 21:02:13,823 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 780 flow [2023-08-29 21:02:13,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:13,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:13,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:13,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:14,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:14,037 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:14,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1828293503, now seen corresponding path program 1 times [2023-08-29 21:02:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:14,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438547568] [2023-08-29 21:02:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:14,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:14,039 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:14,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 21:02:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:14,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:02:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:14,413 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#data~1#1.base_203| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#data~1#1.base_203|)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#data~1#1.base_203| (_ bv0 1)) |c_#valid|))) is different from true [2023-08-29 21:02:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:14,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:14,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:14,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438547568] [2023-08-29 21:02:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438547568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:14,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:02:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198123516] [2023-08-29 21:02:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:02:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:02:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=4, Unknown=1, NotChecked=2, Total=12 [2023-08-29 21:02:14,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 403 [2023-08-29 21:02:14,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 780 flow. Second operand has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:14,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:14,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 403 [2023-08-29 21:02:14,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:15,719 INFO L130 PetriNetUnfolder]: 933/1731 cut-off events. [2023-08-29 21:02:15,720 INFO L131 PetriNetUnfolder]: For 6015/6015 co-relation queries the response was YES. [2023-08-29 21:02:15,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7278 conditions, 1731 events. 933/1731 cut-off events. For 6015/6015 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9843 event pairs, 391 based on Foata normal form. 0/1500 useless extension candidates. Maximal degree in co-relation 7259. Up to 1001 conditions per place. [2023-08-29 21:02:15,726 INFO L137 encePairwiseOnDemand]: 385/403 looper letters, 73 selfloop transitions, 28 changer transitions 2/109 dead transitions. [2023-08-29 21:02:15,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 1116 flow [2023-08-29 21:02:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:02:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:02:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 527 transitions. [2023-08-29 21:02:15,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2023-08-29 21:02:15,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 527 transitions. [2023-08-29 21:02:15,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 527 transitions. [2023-08-29 21:02:15,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:15,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 527 transitions. [2023-08-29 21:02:15,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:15,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:15,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:15,731 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 780 flow. Second operand 4 states and 527 transitions. [2023-08-29 21:02:15,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 1116 flow [2023-08-29 21:02:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 1071 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:02:15,736 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 909 flow [2023-08-29 21:02:15,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=909, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2023-08-29 21:02:15,737 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-08-29 21:02:15,737 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 909 flow [2023-08-29 21:02:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:15,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:15,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:15,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:15,941 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:15,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -285876887, now seen corresponding path program 1 times [2023-08-29 21:02:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637996201] [2023-08-29 21:02:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:15,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:15,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:15,943 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:15,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 21:02:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:02:16,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:16,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:16,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:16,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:02:16,321 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:16,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:16,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:16,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:16,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637996201] [2023-08-29 21:02:16,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637996201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:16,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:16,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:02:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110679231] [2023-08-29 21:02:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:16,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:02:16,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:16,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:02:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:02:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 403 [2023-08-29 21:02:17,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 909 flow. Second operand has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:17,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:17,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 403 [2023-08-29 21:02:17,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:21,585 INFO L130 PetriNetUnfolder]: 822/1574 cut-off events. [2023-08-29 21:02:21,586 INFO L131 PetriNetUnfolder]: For 6358/6399 co-relation queries the response was YES. [2023-08-29 21:02:21,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7236 conditions, 1574 events. 822/1574 cut-off events. For 6358/6399 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9401 event pairs, 218 based on Foata normal form. 8/1480 useless extension candidates. Maximal degree in co-relation 7217. Up to 609 conditions per place. [2023-08-29 21:02:21,591 INFO L137 encePairwiseOnDemand]: 389/403 looper letters, 104 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2023-08-29 21:02:21,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1495 flow [2023-08-29 21:02:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:02:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:02:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1197 transitions. [2023-08-29 21:02:21,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42431761786600497 [2023-08-29 21:02:21,594 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1197 transitions. [2023-08-29 21:02:21,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1197 transitions. [2023-08-29 21:02:21,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:21,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1197 transitions. [2023-08-29 21:02:21,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:21,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:21,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:21,599 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 909 flow. Second operand 7 states and 1197 transitions. [2023-08-29 21:02:21,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1495 flow [2023-08-29 21:02:21,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 144 transitions, 1413 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-29 21:02:21,612 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 886 flow [2023-08-29 21:02:21,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=886, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2023-08-29 21:02:21,613 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2023-08-29 21:02:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 886 flow [2023-08-29 21:02:21,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:21,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:21,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:21,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:21,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:21,825 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:21,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash -272533386, now seen corresponding path program 1 times [2023-08-29 21:02:21,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:21,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031415010] [2023-08-29 21:02:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:21,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:21,827 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:21,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 21:02:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:22,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 21:02:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:22,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:22,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:02:22,202 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:22,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:22,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031415010] [2023-08-29 21:02:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031415010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:22,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:02:22,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125293476] [2023-08-29 21:02:22,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:22,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:02:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:02:22,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:02:23,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 403 [2023-08-29 21:02:23,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 886 flow. Second operand has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:23,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:23,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 403 [2023-08-29 21:02:23,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:26,054 INFO L130 PetriNetUnfolder]: 844/1644 cut-off events. [2023-08-29 21:02:26,054 INFO L131 PetriNetUnfolder]: For 6361/6385 co-relation queries the response was YES. [2023-08-29 21:02:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7528 conditions, 1644 events. 844/1644 cut-off events. For 6361/6385 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9888 event pairs, 187 based on Foata normal form. 14/1523 useless extension candidates. Maximal degree in co-relation 7510. Up to 841 conditions per place. [2023-08-29 21:02:26,060 INFO L137 encePairwiseOnDemand]: 387/403 looper letters, 123 selfloop transitions, 30 changer transitions 2/166 dead transitions. [2023-08-29 21:02:26,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1695 flow [2023-08-29 21:02:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:02:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:02:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1381 transitions. [2023-08-29 21:02:26,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283498759305211 [2023-08-29 21:02:26,062 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1381 transitions. [2023-08-29 21:02:26,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1381 transitions. [2023-08-29 21:02:26,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:26,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1381 transitions. [2023-08-29 21:02:26,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:26,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 403.0) internal successors, (3627), 9 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:26,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 403.0) internal successors, (3627), 9 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:26,067 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 886 flow. Second operand 8 states and 1381 transitions. [2023-08-29 21:02:26,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1695 flow [2023-08-29 21:02:26,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1645 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:02:26,075 INFO L231 Difference]: Finished difference. Result has 99 places, 103 transitions, 1026 flow [2023-08-29 21:02:26,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=99, PETRI_TRANSITIONS=103} [2023-08-29 21:02:26,076 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 23 predicate places. [2023-08-29 21:02:26,076 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 103 transitions, 1026 flow [2023-08-29 21:02:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:26,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:26,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:26,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:26,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:26,290 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:26,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -272519436, now seen corresponding path program 2 times [2023-08-29 21:02:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:26,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094124270] [2023-08-29 21:02:26,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:02:26,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:26,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:26,292 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:26,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 21:02:26,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:02:26,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:02:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:02:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:26,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:26,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:26,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:02:26,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:26,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:26,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:26,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094124270] [2023-08-29 21:02:26,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094124270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:26,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:26,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:02:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368030931] [2023-08-29 21:02:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:26,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:02:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:02:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:02:28,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 403 [2023-08-29 21:02:28,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 103 transitions, 1026 flow. Second operand has 6 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:28,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:28,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 403 [2023-08-29 21:02:28,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:30,820 INFO L130 PetriNetUnfolder]: 816/1594 cut-off events. [2023-08-29 21:02:30,821 INFO L131 PetriNetUnfolder]: For 6859/6916 co-relation queries the response was YES. [2023-08-29 21:02:30,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7487 conditions, 1594 events. 816/1594 cut-off events. For 6859/6916 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9576 event pairs, 176 based on Foata normal form. 14/1500 useless extension candidates. Maximal degree in co-relation 7468. Up to 604 conditions per place. [2023-08-29 21:02:30,826 INFO L137 encePairwiseOnDemand]: 389/403 looper letters, 113 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2023-08-29 21:02:30,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 163 transitions, 1703 flow [2023-08-29 21:02:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:02:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:02:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1415 transitions. [2023-08-29 21:02:30,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43889578163771714 [2023-08-29 21:02:30,830 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1415 transitions. [2023-08-29 21:02:30,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1415 transitions. [2023-08-29 21:02:30,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:30,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1415 transitions. [2023-08-29 21:02:30,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.875) internal successors, (1415), 8 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:30,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 403.0) internal successors, (3627), 9 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:30,835 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 403.0) internal successors, (3627), 9 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:30,835 INFO L175 Difference]: Start difference. First operand has 99 places, 103 transitions, 1026 flow. Second operand 8 states and 1415 transitions. [2023-08-29 21:02:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 163 transitions, 1703 flow [2023-08-29 21:02:30,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1667 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 21:02:30,843 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 1048 flow [2023-08-29 21:02:30,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2023-08-29 21:02:30,844 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 23 predicate places. [2023-08-29 21:02:30,844 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 1048 flow [2023-08-29 21:02:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:30,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:30,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:30,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:31,058 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:31,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash 29352651, now seen corresponding path program 1 times [2023-08-29 21:02:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279811451] [2023-08-29 21:02:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:31,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:31,060 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:31,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 21:02:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:02:31,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:31,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:31,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:31,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279811451] [2023-08-29 21:02:31,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279811451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:31,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:02:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232152200] [2023-08-29 21:02:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:02:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:02:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:02:31,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 403 [2023-08-29 21:02:31,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 1048 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:31,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:31,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 403 [2023-08-29 21:02:31,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:32,874 INFO L130 PetriNetUnfolder]: 83/237 cut-off events. [2023-08-29 21:02:32,874 INFO L131 PetriNetUnfolder]: For 738/738 co-relation queries the response was YES. [2023-08-29 21:02:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 237 events. 83/237 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 916 event pairs, 24 based on Foata normal form. 16/236 useless extension candidates. Maximal degree in co-relation 988. Up to 165 conditions per place. [2023-08-29 21:02:32,875 INFO L137 encePairwiseOnDemand]: 401/403 looper letters, 46 selfloop transitions, 1 changer transitions 1/55 dead transitions. [2023-08-29 21:02:32,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 55 transitions, 588 flow [2023-08-29 21:02:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:02:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:02:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-29 21:02:32,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532671629445823 [2023-08-29 21:02:32,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-29 21:02:32,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-29 21:02:32,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:32,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-29 21:02:32,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:32,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:32,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:32,879 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 1048 flow. Second operand 3 states and 548 transitions. [2023-08-29 21:02:32,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 55 transitions, 588 flow [2023-08-29 21:02:32,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 338 flow, removed 35 selfloop flow, removed 20 redundant places. [2023-08-29 21:02:32,882 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 215 flow [2023-08-29 21:02:32,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-29 21:02:32,882 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2023-08-29 21:02:32,883 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 215 flow [2023-08-29 21:02:32,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:32,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:32,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:32,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:33,097 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:33,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1585567312, now seen corresponding path program 1 times [2023-08-29 21:02:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787857257] [2023-08-29 21:02:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:33,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:33,098 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:33,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 21:02:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:02:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:33,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:02:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:33,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:33,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787857257] [2023-08-29 21:02:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787857257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:33,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:02:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193811516] [2023-08-29 21:02:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:02:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:02:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:02:33,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 403 [2023-08-29 21:02:33,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:33,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:33,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 403 [2023-08-29 21:02:33,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:34,665 INFO L130 PetriNetUnfolder]: 83/229 cut-off events. [2023-08-29 21:02:34,665 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2023-08-29 21:02:34,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 229 events. 83/229 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 831 event pairs, 48 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 665. Up to 109 conditions per place. [2023-08-29 21:02:34,666 INFO L137 encePairwiseOnDemand]: 394/403 looper letters, 29 selfloop transitions, 16 changer transitions 0/50 dead transitions. [2023-08-29 21:02:34,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 313 flow [2023-08-29 21:02:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:02:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:02:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-29 21:02:34,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507857733664185 [2023-08-29 21:02:34,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-29 21:02:34,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-29 21:02:34,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:34,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-29 21:02:34,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:34,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:34,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:34,669 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 215 flow. Second operand 3 states and 545 transitions. [2023-08-29 21:02:34,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 313 flow [2023-08-29 21:02:34,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:02:34,670 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 242 flow [2023-08-29 21:02:34,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-08-29 21:02:34,670 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -15 predicate places. [2023-08-29 21:02:34,670 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 242 flow [2023-08-29 21:02:34,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:34,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:34,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:34,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:34,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:34,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -958167381, now seen corresponding path program 1 times [2023-08-29 21:02:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781096224] [2023-08-29 21:02:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:34,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:34,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:34,873 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:34,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-29 21:02:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:02:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:35,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:35,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:35,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:35,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781096224] [2023-08-29 21:02:35,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781096224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:35,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:02:35,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213215648] [2023-08-29 21:02:35,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:35,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:02:35,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:02:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:02:35,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 403 [2023-08-29 21:02:35,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:35,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:35,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 403 [2023-08-29 21:02:35,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:37,053 INFO L130 PetriNetUnfolder]: 83/223 cut-off events. [2023-08-29 21:02:37,053 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-08-29 21:02:37,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 223 events. 83/223 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 786 event pairs, 48 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 687. Up to 109 conditions per place. [2023-08-29 21:02:37,054 INFO L137 encePairwiseOnDemand]: 394/403 looper letters, 29 selfloop transitions, 16 changer transitions 0/48 dead transitions. [2023-08-29 21:02:37,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 48 transitions, 340 flow [2023-08-29 21:02:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:02:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:02:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-29 21:02:37,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44334160463192723 [2023-08-29 21:02:37,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-29 21:02:37,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-29 21:02:37,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:37,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-29 21:02:37,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:37,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:37,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:37,058 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 242 flow. Second operand 3 states and 536 transitions. [2023-08-29 21:02:37,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 48 transitions, 340 flow [2023-08-29 21:02:37,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:02:37,060 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 238 flow [2023-08-29 21:02:37,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-29 21:02:37,061 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -17 predicate places. [2023-08-29 21:02:37,061 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 238 flow [2023-08-29 21:02:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:37,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:37,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:37,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:37,274 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:37,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1023316911, now seen corresponding path program 1 times [2023-08-29 21:02:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534505128] [2023-08-29 21:02:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:37,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:37,276 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:37,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-29 21:02:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-29 21:02:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:37,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:37,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2023-08-29 21:02:37,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 28 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 69 [2023-08-29 21:02:37,980 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:37,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:38,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 35 treesize of output 31 [2023-08-29 21:02:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:38,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:38,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:38,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534505128] [2023-08-29 21:02:38,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534505128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:38,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 21:02:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861728900] [2023-08-29 21:02:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:02:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:02:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:02:39,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 403 [2023-08-29 21:02:39,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 138.125) internal successors, (1105), 8 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:39,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:39,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 403 [2023-08-29 21:02:39,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:43,849 INFO L130 PetriNetUnfolder]: 121/321 cut-off events. [2023-08-29 21:02:43,849 INFO L131 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2023-08-29 21:02:43,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 321 events. 121/321 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1378 event pairs, 3 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 996. Up to 107 conditions per place. [2023-08-29 21:02:43,850 INFO L137 encePairwiseOnDemand]: 384/403 looper letters, 47 selfloop transitions, 43 changer transitions 0/92 dead transitions. [2023-08-29 21:02:43,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 649 flow [2023-08-29 21:02:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:02:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:02:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1441 transitions. [2023-08-29 21:02:43,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575682382133995 [2023-08-29 21:02:43,852 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1441 transitions. [2023-08-29 21:02:43,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1441 transitions. [2023-08-29 21:02:43,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:43,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1441 transitions. [2023-08-29 21:02:43,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:43,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 403.0) internal successors, (4433), 11 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:43,857 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 403.0) internal successors, (4433), 11 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:43,857 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 238 flow. Second operand 10 states and 1441 transitions. [2023-08-29 21:02:43,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 649 flow [2023-08-29 21:02:43,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 595 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:02:43,858 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 541 flow [2023-08-29 21:02:43,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=541, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-29 21:02:43,859 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -6 predicate places. [2023-08-29 21:02:43,859 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 541 flow [2023-08-29 21:02:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.125) internal successors, (1105), 8 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:43,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:43,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:43,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:44,065 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:44,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 706307409, now seen corresponding path program 1 times [2023-08-29 21:02:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:44,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126246930] [2023-08-29 21:02:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:44,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:44,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:44,067 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:44,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-29 21:02:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:02:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:44,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 21:02:44,542 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 21:02:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 21:02:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:44,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:44,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:44,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126246930] [2023-08-29 21:02:44,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126246930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:44,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:44,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 21:02:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412983693] [2023-08-29 21:02:44,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:02:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:02:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:02:46,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 403 [2023-08-29 21:02:46,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 541 flow. Second operand has 8 states, 8 states have (on average 149.125) internal successors, (1193), 8 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:46,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:46,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 403 [2023-08-29 21:02:46,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:51,327 INFO L130 PetriNetUnfolder]: 120/318 cut-off events. [2023-08-29 21:02:51,327 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2023-08-29 21:02:51,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 318 events. 120/318 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1357 event pairs, 29 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 1161. Up to 125 conditions per place. [2023-08-29 21:02:51,328 INFO L137 encePairwiseOnDemand]: 391/403 looper letters, 50 selfloop transitions, 32 changer transitions 0/84 dead transitions. [2023-08-29 21:02:51,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 740 flow [2023-08-29 21:02:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:02:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:02:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1083 transitions. [2023-08-29 21:02:51,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839064161644807 [2023-08-29 21:02:51,330 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1083 transitions. [2023-08-29 21:02:51,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1083 transitions. [2023-08-29 21:02:51,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:51,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1083 transitions. [2023-08-29 21:02:51,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:51,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:51,334 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:51,334 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 541 flow. Second operand 7 states and 1083 transitions. [2023-08-29 21:02:51,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 740 flow [2023-08-29 21:02:51,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 713 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-29 21:02:51,336 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 549 flow [2023-08-29 21:02:51,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=549, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-08-29 21:02:51,337 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2023-08-29 21:02:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 549 flow [2023-08-29 21:02:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 149.125) internal successors, (1193), 8 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:51,350 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 (30)] Ended with exit code 0 [2023-08-29 21:02:51,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:51,541 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:51,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash 971625504, now seen corresponding path program 1 times [2023-08-29 21:02:51,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:51,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520594175] [2023-08-29 21:02:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:51,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:51,543 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:51,543 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 (31)] Waiting until timeout for monitored process [2023-08-29 21:02:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:02:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:51,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:51,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520594175] [2023-08-29 21:02:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520594175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:51,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:02:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783041616] [2023-08-29 21:02:51,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 21:02:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 21:02:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 21:02:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 403 [2023-08-29 21:02:52,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:52,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:02:52,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 403 [2023-08-29 21:02:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:02:53,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:02:54,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:02:55,909 INFO L130 PetriNetUnfolder]: 128/340 cut-off events. [2023-08-29 21:02:55,910 INFO L131 PetriNetUnfolder]: For 666/666 co-relation queries the response was YES. [2023-08-29 21:02:55,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 340 events. 128/340 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1578 event pairs, 6 based on Foata normal form. 7/338 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2023-08-29 21:02:55,911 INFO L137 encePairwiseOnDemand]: 389/403 looper letters, 62 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2023-08-29 21:02:55,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 797 flow [2023-08-29 21:02:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:02:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:02:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1157 transitions. [2023-08-29 21:02:55,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2023-08-29 21:02:55,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1157 transitions. [2023-08-29 21:02:55,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1157 transitions. [2023-08-29 21:02:55,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:02:55,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1157 transitions. [2023-08-29 21:02:55,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:55,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:55,917 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 403.0) internal successors, (3224), 8 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:55,917 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 549 flow. Second operand 7 states and 1157 transitions. [2023-08-29 21:02:55,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 797 flow [2023-08-29 21:02:55,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 738 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-29 21:02:55,920 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 575 flow [2023-08-29 21:02:55,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2023-08-29 21:02:55,920 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-29 21:02:55,920 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 575 flow [2023-08-29 21:02:55,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:02:55,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:02:55,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:02:55,934 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 (31)] Forceful destruction successful, exit code 0 [2023-08-29 21:02:56,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:56,133 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:02:56,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:02:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1915902939, now seen corresponding path program 1 times [2023-08-29 21:02:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:02:56,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720661284] [2023-08-29 21:02:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:02:56,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:02:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:02:56,135 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:02:56,135 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 (32)] Waiting until timeout for monitored process [2023-08-29 21:02:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:02:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-29 21:02:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:02:56,656 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 21:02:56,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-29 21:02:56,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 63 [2023-08-29 21:02:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:56,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 51 [2023-08-29 21:02:56,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 81 [2023-08-29 21:02:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:02:57,194 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:02:57,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-29 21:02:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 71 treesize of output 67 [2023-08-29 21:02:57,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 30 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 105 [2023-08-29 21:02:57,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 58 [2023-08-29 21:02:57,738 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-08-29 21:02:57,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2023-08-29 21:02:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:02:57,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:02:57,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 21:02:57,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 209 [2023-08-29 21:02:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:02:58,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:02:58,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 21:02:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720661284] [2023-08-29 21:02:58,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720661284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:02:58,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:02:58,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 21:02:58,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881786395] [2023-08-29 21:02:58,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:02:58,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:02:58,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 21:02:58,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:02:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:03:02,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 403 [2023-08-29 21:03:02,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 575 flow. Second operand has 13 states, 13 states have (on average 133.30769230769232) internal successors, (1733), 13 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:03:02,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:03:02,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 403 [2023-08-29 21:03:02,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:03:03,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:03:09,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 21:03:15,236 INFO L130 PetriNetUnfolder]: 152/420 cut-off events. [2023-08-29 21:03:15,237 INFO L131 PetriNetUnfolder]: For 1102/1102 co-relation queries the response was YES. [2023-08-29 21:03:15,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 420 events. 152/420 cut-off events. For 1102/1102 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2129 event pairs, 27 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 1731. Up to 277 conditions per place. [2023-08-29 21:03:15,239 INFO L137 encePairwiseOnDemand]: 386/403 looper letters, 93 selfloop transitions, 51 changer transitions 0/146 dead transitions. [2023-08-29 21:03:15,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 146 transitions, 1445 flow [2023-08-29 21:03:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 21:03:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 21:03:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1945 transitions. [2023-08-29 21:03:15,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447359092520383 [2023-08-29 21:03:15,243 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1945 transitions. [2023-08-29 21:03:15,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1945 transitions. [2023-08-29 21:03:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:03:15,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1945 transitions. [2023-08-29 21:03:15,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 138.92857142857142) internal successors, (1945), 14 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:03:15,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 403.0) internal successors, (6045), 15 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:03:15,248 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 403.0) internal successors, (6045), 15 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:03:15,249 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 575 flow. Second operand 14 states and 1945 transitions. [2023-08-29 21:03:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 146 transitions, 1445 flow [2023-08-29 21:03:15,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 146 transitions, 1324 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 21:03:15,252 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 1073 flow [2023-08-29 21:03:15,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1073, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-08-29 21:03:15,253 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2023-08-29 21:03:15,253 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 1073 flow [2023-08-29 21:03:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 133.30769230769232) internal successors, (1733), 13 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:03:15,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:03:15,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:03:15,269 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 (32)] Forceful destruction successful, exit code 0 [2023-08-29 21:03:15,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:03:15,465 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:03:15,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:03:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1836302855, now seen corresponding path program 2 times [2023-08-29 21:03:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 21:03:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493299362] [2023-08-29 21:03:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:03:15,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:03:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 21:03:15,467 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 21:03:15,468 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 (33)] Waiting until timeout for monitored process [2023-08-29 21:03:15,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:03:15,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-08-29 21:03:15,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:03:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:03:16,264 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 21:03:16,264 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:03:16,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK (52 of 53 remaining) [2023-08-29 21:03:16,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK (51 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 53 remaining) [2023-08-29 21:03:16,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 53 remaining) [2023-08-29 21:03:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK (30 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK (25 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (22 of 53 remaining) [2023-08-29 21:03:16,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 53 remaining) [2023-08-29 21:03:16,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 53 remaining) [2023-08-29 21:03:16,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 53 remaining) [2023-08-29 21:03:16,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location my_callbackErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 53 remaining) [2023-08-29 21:03:16,293 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 (33)] Forceful destruction successful, exit code 0 [2023-08-29 21:03:16,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 21:03:16,472 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:03:16,477 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 21:03:16,477 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 21:03:16,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:03:16 BasicIcfg [2023-08-29 21:03:16,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 21:03:16,516 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 21:03:16,516 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 21:03:16,516 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 21:03:16,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:25" (3/4) ... [2023-08-29 21:03:16,519 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 21:03:16,519 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 21:03:16,519 INFO L158 Benchmark]: Toolchain (without parser) took 653394.17ms. Allocated memory was 60.8MB in the beginning and 165.7MB in the end (delta: 104.9MB). Free memory was 26.3MB in the beginning and 63.2MB in the end (delta: -37.0MB). Peak memory consumption was 70.9MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,519 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:03:16,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1001.76ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 40.8MB in the beginning and 43.3MB in the end (delta: -2.5MB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.64ms. Allocated memory is still 75.5MB. Free memory was 43.3MB in the beginning and 39.8MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,520 INFO L158 Benchmark]: Boogie Preprocessor took 55.67ms. Allocated memory is still 75.5MB. Free memory was 39.8MB in the beginning and 36.5MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,521 INFO L158 Benchmark]: RCFGBuilder took 941.93ms. Allocated memory is still 75.5MB. Free memory was 36.5MB in the beginning and 28.7MB in the end (delta: 7.8MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,521 INFO L158 Benchmark]: TraceAbstraction took 651310.03ms. Allocated memory was 75.5MB in the beginning and 165.7MB in the end (delta: 90.2MB). Free memory was 27.9MB in the beginning and 63.2MB in the end (delta: -35.3MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. [2023-08-29 21:03:16,521 INFO L158 Benchmark]: Witness Printer took 3.08ms. Allocated memory is still 165.7MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:03:16,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1001.76ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 40.8MB in the beginning and 43.3MB in the end (delta: -2.5MB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.64ms. Allocated memory is still 75.5MB. Free memory was 43.3MB in the beginning and 39.8MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.67ms. Allocated memory is still 75.5MB. Free memory was 39.8MB in the beginning and 36.5MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 941.93ms. Allocated memory is still 75.5MB. Free memory was 36.5MB in the beginning and 28.7MB in the end (delta: 7.8MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * TraceAbstraction took 651310.03ms. Allocated memory was 75.5MB in the beginning and 165.7MB in the end (delta: 90.2MB). Free memory was 27.9MB in the beginning and 63.2MB in the end (delta: -35.3MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. * Witness Printer took 3.08ms. Allocated memory is still 165.7MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 531.2s, 187 PlacesBefore, 76 PlacesAfterwards, 187 TransitionsBefore, 73 TransitionsAfterwards, 4576 CoEnabledTransitionPairs, 7 FixpointIterations, 110 TrivialSequentialCompositions, 89 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 10 ConcurrentYvCompositions, 3 ChoiceCompositions, 214 TotalNumberOfCompositions, 15254 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5131, independent: 4770, independent conditional: 0, independent unconditional: 4770, dependent: 361, dependent conditional: 0, dependent unconditional: 361, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2314, independent: 2245, independent conditional: 0, independent unconditional: 2245, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5131, independent: 2525, independent conditional: 0, independent unconditional: 2525, dependent: 292, dependent conditional: 0, dependent unconditional: 292, unknown: 2314, unknown conditional: 0, unknown unconditional: 2314] , Statistics on independence cache: Total cache size (in pairs): 196, Positive cache size: 166, Positive conditional cache size: 0, Positive unconditional cache size: 166, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1675]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1675. Possible FailurePath: [L1676] 0 pthread_t t1,t2; [L1731] CALL, EXPR 0 my_drv_init() [L1725] 0 return 0; [L1731] RET, EXPR 0 my_drv_init() [L1731] 0 int ret = my_drv_init(); [L1732] COND TRUE 0 ret==0 [L1733] 0 int probe_ret; [L1734] 0 struct my_data data; [L1735] CALL, EXPR 0 my_drv_probe(&data) [L1704] 0 struct device *d = &data->dev; [L1706] 0 data->shared.a = 0 [L1707] 0 data->shared.b = 0 [L1708] 0 int res = __VERIFIER_nondet_int(); [L1709] COND FALSE 0 !(\read(res)) [L1711] FCALL, FORK 0 pthread_create(&t1, ((void *)0), my_callback, (void *)d) VAL [arg={7:24}, d={7:24}, data={7:0}, data={7:0}, pthread_create(&t1, ((void *)0), my_callback, (void *)d)=-1, res=0, t1={3:0}, t2={4:0}] [L1689] 1 struct device *dev = (struct device*)arg; [L1690] 1 struct my_data *data; [L1691] 1 const typeof( ((struct my_data *)0)->dev ) *__mptr = (dev); [L1691] 1 data = ({ const typeof( ((struct my_data *)0)->dev ) *__mptr = (dev); (struct my_data *)( (char *)__mptr - ((unsigned long) &((struct my_data *)0)->dev) );}) [L1693] 1 data->shared.a = 1 VAL [__mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, dev={7:24}, t1={3:0}, t2={4:0}] [L1712] FCALL, FORK 0 pthread_create(&t2, ((void *)0), my_callback, (void *)d) VAL [__mptr={7:24}, arg={7:24}, arg={7:24}, d={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, pthread_create(&t2, ((void *)0), my_callback, (void *)d)=0, res=0, t1={3:0}, t2={4:0}] [L1713] 0 return 0; [L1735] RET, EXPR 0 my_drv_probe(&data) [L1735] 0 probe_ret = my_drv_probe(&data) VAL [__mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, dev={7:24}, my_drv_probe(&data)=0, probe_ret=0, ret=0, t1={3:0}, t2={4:0}] [L1696] EXPR 1 data->shared.b [L1696] 1 int lb = data->shared.b; [L1689] 2 struct device *dev = (struct device*)arg; [L1690] 2 struct my_data *data; [L1691] 2 const typeof( ((struct my_data *)0)->dev ) *__mptr = (dev); [L1691] 2 data = ({ const typeof( ((struct my_data *)0)->dev ) *__mptr = (dev); (struct my_data *)( (char *)__mptr - ((unsigned long) &((struct my_data *)0)->dev) );}) [L1693] 2 data->shared.a = 1 VAL [__mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, dev={7:24}, lb=0, t1={3:0}, t2={4:0}] [L1696] EXPR 2 data->shared.b [L1696] 2 int lb = data->shared.b; [L1699] 1 data->shared.b = lb + 1 [L1701] 1 return 0; [L1736] COND TRUE 0 probe_ret==0 [L1737] CALL 0 my_drv_disconnect(&data) [L1719] 0 void *status; VAL [\result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, lb=0, status={15:0}, t1={3:0}, t2={4:0}] [L1720] 0 \read(t1) VAL [\read(t1)=-1, \result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, lb=0, status={15:0}, t1={3:0}, t2={4:0}] [L1720] FCALL, JOIN 1 pthread_join(t1, &status) VAL [\read(t1)=-1, \result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, lb=0, pthread_join(t1, &status)={0:0}, status={15:0}, t1={3:0}, t2={4:0}] [L1699] 2 data->shared.b = lb + 1 [L1701] 2 return 0; [L1721] 0 \read(t2) VAL [\read(t2)=0, \result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, lb=0, status={15:0}, t1={3:0}, t2={4:0}] [L1721] FCALL, JOIN 2 pthread_join(t2, &status) VAL [\read(t2)=0, \result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, data={7:0}, data={7:0}, dev={7:24}, lb=0, pthread_join(t2, &status)={0:0}, status={15:0}, t1={3:0}, t2={4:0}] [L1737] RET 0 my_drv_disconnect(&data) [L1738] EXPR 0 data.shared.a [L1738] CALL 0 ldv_assert(data.shared.a==1) [L1675] COND FALSE 0 !(!expression) [L1738] RET 0 ldv_assert(data.shared.a==1) [L1739] EXPR 0 data.shared.b [L1739] CALL 0 ldv_assert(data.shared.b==2) [L1675] COND TRUE 0 !expression [L1675] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __mptr={7:24}, arg={7:24}, arg={7:24}, data={7:0}, dev={7:24}, expression=0, lb=0, t1={3:0}, t2={4:0}] - UnprovableResult [Line: 1730]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1675]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1675]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1675]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1711]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1712]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 202 locations, 53 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 651.1s, OverallIterations: 32, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 101.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 531.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8210 SdHoareTripleChecker+Valid, 94.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5279 mSDsluCounter, 2377 SdHoareTripleChecker+Invalid, 90.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 147 IncrementalHoareTripleChecker+Unchecked, 1695 mSDsCounter, 407 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16009 IncrementalHoareTripleChecker+Invalid, 16563 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 407 mSolverCounterUnsat, 682 mSDtfsCounter, 16009 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1073occurred in iteration=31, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 195 ConstructedInterpolants, 7 QuantifiedInterpolants, 3835 SizeOfPredicates, 227 NumberOfNonLiveVariables, 5323 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 21:03:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample