./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:29,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:29,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:29,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:29,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:29,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:29,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:29,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:29,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:29,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:29,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:29,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:29,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:29,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:29,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:29,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:29,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:29,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:29,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:29,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:29,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:29,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:29,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:29,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:29,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:29,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:29,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:29,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:29,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:29,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:29,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:29,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:29,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:29,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:29,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:29,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:29,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:29,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:29,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:29,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:29,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:29,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:23:29,282 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:29,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:29,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:29,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:29,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:29,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:29,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:29,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:29,286 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:29,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:29,287 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:29,287 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:29,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:29,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:29,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:29,289 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:29,289 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:29,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:29,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:29,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:29,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:29,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:29,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:29,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:23:29,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:23:29,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:29,291 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:29,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:29,292 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:29,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:29,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:29,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:29,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:29,626 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:29,627 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:29,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 00:23:30,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:30,935 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:30,936 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 00:23:30,941 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40760c73f/e9c8120241264418a3e3e0e66357d923/FLAG5880aab60 [2023-08-30 00:23:30,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40760c73f/e9c8120241264418a3e3e0e66357d923 [2023-08-30 00:23:30,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:30,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:30,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:30,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:30,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:30,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:30" (1/1) ... [2023-08-30 00:23:30,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c8b706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:30, skipping insertion in model container [2023-08-30 00:23:30,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:30" (1/1) ... [2023-08-30 00:23:30,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:30,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:31,111 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 00:23:31,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:31,128 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:23:31,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4029d27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:31, skipping insertion in model container [2023-08-30 00:23:31,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:31,129 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:23:31,130 INFO L158 Benchmark]: Toolchain (without parser) took 174.07ms. Allocated memory is still 69.2MB. Free memory was 46.9MB in the beginning and 37.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:23:31,131 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:23:31,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.16ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:23:31,133 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 56.6MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.16ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:23:32,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:23:32,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:23:32,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:23:32,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:23:32,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:23:32,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:23:32,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:23:32,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:23:32,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:23:32,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:23:32,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:23:32,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:23:32,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:23:32,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:23:32,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:23:32,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:23:32,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:23:32,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:23:32,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:23:32,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:23:32,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:23:32,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:23:32,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:23:32,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:23:32,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:23:32,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:23:32,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:23:32,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:23:32,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:23:32,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:23:32,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:23:32,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:23:32,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:23:32,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:23:32,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:23:32,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:23:32,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:23:32,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:23:32,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:23:32,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:23:32,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:23:32,981 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:23:32,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:23:32,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:23:32,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:23:32,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:23:32,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:23:32,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:23:32,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:23:32,985 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:23:32,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:23:32,986 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:23:32,986 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:23:32,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:23:32,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:23:32,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:23:32,987 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:23:32,988 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:23:32,988 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:23:32,988 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:23:32,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:23:32,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:23:32,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:23:32,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:32,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:23:32,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:23:32,989 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:23:32,990 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:23:32,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:23:32,990 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:23:32,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:23:32,990 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:23:32,991 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:23:32,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:23:33,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:23:33,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:23:33,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:23:33,332 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:23:33,332 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:23:33,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 00:23:34,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:23:34,587 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:23:34,588 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 00:23:34,599 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24211696b/e0c71d30d6c44fe9b238a53ec521f82e/FLAGcfcbf60dc [2023-08-30 00:23:34,616 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24211696b/e0c71d30d6c44fe9b238a53ec521f82e [2023-08-30 00:23:34,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:23:34,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:23:34,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:34,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:23:34,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:23:34,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:34,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5210079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34, skipping insertion in model container [2023-08-30 00:23:34,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:34,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:23:34,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:34,806 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 00:23:34,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:34,844 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:23:34,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:23:34,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 00:23:34,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:34,898 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:23:34,934 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 00:23:34,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:23:34,951 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:34,951 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:23:34,957 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:23:34,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34 WrapperNode [2023-08-30 00:23:34,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:23:34,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:34,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:23:34,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:23:34,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:34,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,011 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2023-08-30 00:23:35,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:23:35,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:23:35,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:23:35,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:23:35,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,061 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:23:35,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:23:35,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:23:35,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:23:35,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (1/1) ... [2023-08-30 00:23:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:23:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:23:35,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:23:35,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:23:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:23:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:23:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:23:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:23:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:23:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:23:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:23:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:23:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:23:35,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:23:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:23:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:23:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:23:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:23:35,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:23:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:23:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:23:35,143 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:23:35,263 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:23:35,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:23:35,807 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:23:35,925 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:23:35,926 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:23:35,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:35 BoogieIcfgContainer [2023-08-30 00:23:35,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:23:35,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:23:35,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:23:35,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:23:35,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:23:34" (1/3) ... [2023-08-30 00:23:35,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e40bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:35, skipping insertion in model container [2023-08-30 00:23:35,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:23:34" (2/3) ... [2023-08-30 00:23:35,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e40bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:23:35, skipping insertion in model container [2023-08-30 00:23:35,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:23:35" (3/3) ... [2023-08-30 00:23:35,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-08-30 00:23:35,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:23:35,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:23:35,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:23:36,025 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:23:36,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 00:23:36,152 INFO L130 PetriNetUnfolder]: 12/169 cut-off events. [2023-08-30 00:23:36,153 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:23:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 12/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 00:23:36,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 00:23:36,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 165 transitions, 348 flow [2023-08-30 00:23:36,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:23:36,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 00:23:36,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 00:23:36,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 348 flow [2023-08-30 00:23:36,237 INFO L130 PetriNetUnfolder]: 12/165 cut-off events. [2023-08-30 00:23:36,237 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:23:36,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 12/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 00:23:36,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 00:23:51,785 INFO L134 LiptonReduction]: Checked pairs total: 3400 [2023-08-30 00:23:51,786 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 00:23:51,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:23:51,806 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;@533bce26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:23:51,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 00:23:51,811 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:23:51,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:23:51,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:51,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:51,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:51,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash 22228, now seen corresponding path program 1 times [2023-08-30 00:23:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443024911] [2023-08-30 00:23:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:51,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:23:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:23:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:52,192 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:23:52,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:23:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:52,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:52,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:52,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443024911] [2023-08-30 00:23:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443024911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:52,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:52,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453597658] [2023-08-30 00:23:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:52,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:52,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:23:52,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:52,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:52,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:23:52,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:53,479 INFO L130 PetriNetUnfolder]: 5471/6966 cut-off events. [2023-08-30 00:23:53,480 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 00:23:53,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 6966 events. 5471/6966 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31692 event pairs, 2601 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 6096. Up to 3485 conditions per place. [2023-08-30 00:23:53,537 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 00:23:53,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 00:23:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 00:23:53,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-30 00:23:53,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 00:23:53,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 00:23:53,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:53,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 00:23:53,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-30 00:23:53,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:53,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:53,582 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 518 transitions. [2023-08-30 00:23:53,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 00:23:53,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:23:53,593 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 00:23:53,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 00:23:53,602 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 00:23:53,602 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 00:23:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:53,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:53,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:53,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:53,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 22299, now seen corresponding path program 1 times [2023-08-30 00:23:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:53,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779331981] [2023-08-30 00:23:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:53,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:23:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:23:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:53,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:53,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779331981] [2023-08-30 00:23:53,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779331981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:53,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:53,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139747171] [2023-08-30 00:23:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:53,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 333 [2023-08-30 00:23:53,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:53,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:53,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 333 [2023-08-30 00:23:53,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:54,416 INFO L130 PetriNetUnfolder]: 2765/3515 cut-off events. [2023-08-30 00:23:54,416 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:23:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 3515 events. 2765/3515 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14341 event pairs, 1310 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 7031. Up to 3488 conditions per place. [2023-08-30 00:23:54,436 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 00:23:54,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2023-08-30 00:23:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-30 00:23:54,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754754754754755 [2023-08-30 00:23:54,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-30 00:23:54,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-30 00:23:54,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:54,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-30 00:23:54,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:54,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:54,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:54,443 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 475 transitions. [2023-08-30 00:23:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2023-08-30 00:23:54,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:54,445 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-30 00:23:54,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 00:23:54,445 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-08-30 00:23:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-30 00:23:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:54,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:54,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:23:54,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 00:23:54,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:54,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:54,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 22229, now seen corresponding path program 1 times [2023-08-30 00:23:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993430295] [2023-08-30 00:23:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:54,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:54,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:23:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:23:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:54,798 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:23:54,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:23:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:54,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:54,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:54,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993430295] [2023-08-30 00:23:54,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993430295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:54,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:54,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:54,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522823066] [2023-08-30 00:23:54,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:54,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:54,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:54,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:23:54,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:54,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:54,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:23:54,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:55,350 INFO L130 PetriNetUnfolder]: 2765/3513 cut-off events. [2023-08-30 00:23:55,350 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:23:55,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 3513 events. 2765/3513 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14348 event pairs, 1310 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 7032. Up to 3487 conditions per place. [2023-08-30 00:23:55,371 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 00:23:55,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2023-08-30 00:23:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 00:23:55,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644644644644645 [2023-08-30 00:23:55,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 00:23:55,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 00:23:55,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:55,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 00:23:55,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 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) [2023-08-30 00:23:55,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:55,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:55,378 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 464 transitions. [2023-08-30 00:23:55,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2023-08-30 00:23:55,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:23:55,380 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2023-08-30 00:23:55,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 00:23:55,381 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 00:23:55,381 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2023-08-30 00:23:55,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:55,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:55,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:55,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:55,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:55,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:55,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 691115, now seen corresponding path program 1 times [2023-08-30 00:23:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611085953] [2023-08-30 00:23:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:55,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:55,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:55,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:23:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:23:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:55,759 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:23:55,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:23:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:55,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:56,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:56,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611085953] [2023-08-30 00:23:56,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611085953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:23:56,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:23:56,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:23:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972019149] [2023-08-30 00:23:56,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:23:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:23:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:23:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:23:56,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:23:56,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:56,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:56,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:23:56,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:57,564 INFO L130 PetriNetUnfolder]: 5477/6973 cut-off events. [2023-08-30 00:23:57,564 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:23:57,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 6973 events. 5477/6973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31537 event pairs, 2601 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 13967. Up to 3484 conditions per place. [2023-08-30 00:23:57,599 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-30 00:23:57,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2023-08-30 00:23:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:23:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:23:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 906 transitions. [2023-08-30 00:23:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-08-30 00:23:57,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 906 transitions. [2023-08-30 00:23:57,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 906 transitions. [2023-08-30 00:23:57,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:57,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 906 transitions. [2023-08-30 00:23:57,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:57,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:57,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:57,613 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 906 transitions. [2023-08-30 00:23:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2023-08-30 00:23:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:57,616 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2023-08-30 00:23:57,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 00:23:57,618 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-30 00:23:57,618 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2023-08-30 00:23:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:57,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:57,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:57,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:57,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:57,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 691186, now seen corresponding path program 1 times [2023-08-30 00:23:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:57,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669019614] [2023-08-30 00:23:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:57,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:57,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:23:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:23:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:57,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:58,019 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 00:23:58,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 00:23:58,048 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:23:58,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:23:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:23:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:58,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:58,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669019614] [2023-08-30 00:23:58,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669019614] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 00:23:58,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 00:23:58,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 00:23:58,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426288746] [2023-08-30 00:23:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:23:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:23:58,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:58,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:58,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:23:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:59,285 INFO L130 PetriNetUnfolder]: 4373/5617 cut-off events. [2023-08-30 00:23:59,285 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 00:23:59,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 5617 events. 4373/5617 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 25204 event pairs, 2060 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 11283. Up to 5565 conditions per place. [2023-08-30 00:23:59,311 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 00:23:59,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 273 flow [2023-08-30 00:23:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-30 00:23:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394394394394394 [2023-08-30 00:23:59,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-30 00:23:59,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-30 00:23:59,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:59,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-30 00:23:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,318 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 3 states and 439 transitions. [2023-08-30 00:23:59,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 273 flow [2023-08-30 00:23:59,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 255 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:59,320 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 165 flow [2023-08-30 00:23:59,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=165, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 00:23:59,321 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 00:23:59,321 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 165 flow [2023-08-30 00:23:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:59,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:23:59,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:23:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:59,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:23:59,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 691187, now seen corresponding path program 1 times [2023-08-30 00:23:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099418881] [2023-08-30 00:23:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:59,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:23:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:59,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:23:59,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:23:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:23:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:59,671 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 00:23:59,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 00:23:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:23:59,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:59,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:59,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099418881] [2023-08-30 00:23:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099418881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:59,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:59,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:23:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460165550] [2023-08-30 00:23:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:59,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:23:59,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:23:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:23:59,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:23:59,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:59,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:59,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:23:59,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:00,438 INFO L130 PetriNetUnfolder]: 3211/4203 cut-off events. [2023-08-30 00:24:00,438 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:24:00,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 4203 events. 3211/4203 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 18838 event pairs, 1500 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 8437. Up to 4151 conditions per place. [2023-08-30 00:24:00,456 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 00:24:00,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 227 flow [2023-08-30 00:24:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 00:24:00,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 00:24:00,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 00:24:00,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 00:24:00,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:00,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 00:24:00,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:00,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:00,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:00,463 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 165 flow. Second operand 3 states and 461 transitions. [2023-08-30 00:24:00,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 227 flow [2023-08-30 00:24:00,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:00,466 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2023-08-30 00:24:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 00:24:00,469 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 00:24:00,469 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2023-08-30 00:24:00,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:00,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:00,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:24:00,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:00,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:00,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash 664247777, now seen corresponding path program 1 times [2023-08-30 00:24:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:00,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162188878] [2023-08-30 00:24:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:00,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:00,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:00,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:24:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:24:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:00,821 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 00:24:00,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2023-08-30 00:24:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:00,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:00,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162188878] [2023-08-30 00:24:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162188878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:00,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:24:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729196789] [2023-08-30 00:24:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:00,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:24:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:24:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:24:00,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:24:00,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:00,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:00,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:24:00,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:01,300 INFO L130 PetriNetUnfolder]: 3037/3969 cut-off events. [2023-08-30 00:24:01,300 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:24:01,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7985 conditions, 3969 events. 3037/3969 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 17528 event pairs, 1414 based on Foata normal form. 0/1263 useless extension candidates. Maximal degree in co-relation 7969. Up to 3917 conditions per place. [2023-08-30 00:24:01,315 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 00:24:01,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 220 flow [2023-08-30 00:24:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 00:24:01,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-08-30 00:24:01,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 00:24:01,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 00:24:01,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:01,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 00:24:01,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:01,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:01,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:01,321 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 3 states and 450 transitions. [2023-08-30 00:24:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 220 flow [2023-08-30 00:24:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:01,322 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 141 flow [2023-08-30 00:24:01,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-30 00:24:01,323 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-30 00:24:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 141 flow [2023-08-30 00:24:01,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:01,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:01,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:24:01,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 00:24:01,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:01,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:01,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash 664247778, now seen corresponding path program 1 times [2023-08-30 00:24:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100879010] [2023-08-30 00:24:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:01,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:01,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:01,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:24:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:24:01,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:01,734 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 00:24:01,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 00:24:01,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:24:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:01,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:02,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100879010] [2023-08-30 00:24:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100879010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:02,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:24:02,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891820763] [2023-08-30 00:24:02,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:02,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:24:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:24:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:24:04,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:24:06,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:24:07,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:24:07,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 141 flow. Second operand has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:07,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:24:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:07,766 INFO L130 PetriNetUnfolder]: 2815/3687 cut-off events. [2023-08-30 00:24:07,766 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 00:24:07,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 3687 events. 2815/3687 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 16184 event pairs, 1319 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 7400. Up to 1838 conditions per place. [2023-08-30 00:24:07,784 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 00:24:07,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 341 flow [2023-08-30 00:24:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:24:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:24:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-30 00:24:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-08-30 00:24:07,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-30 00:24:07,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-30 00:24:07,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:07,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-30 00:24:07,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,795 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 141 flow. Second operand 5 states and 727 transitions. [2023-08-30 00:24:07,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 341 flow [2023-08-30 00:24:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:07,798 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 142 flow [2023-08-30 00:24:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-30 00:24:07,801 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 00:24:07,801 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 142 flow [2023-08-30 00:24:07,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:07,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:24:07,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:08,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:08,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:08,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -883796844, now seen corresponding path program 2 times [2023-08-30 00:24:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239381523] [2023-08-30 00:24:08,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:24:08,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:08,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:08,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:24:08,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:24:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:24:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:24:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:08,225 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:24:08,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:24:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:08,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239381523] [2023-08-30 00:24:08,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239381523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:08,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:08,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:24:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211987890] [2023-08-30 00:24:08,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:08,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:24:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:24:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:24:11,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:24:11,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:11,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:11,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:24:11,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:15,745 INFO L130 PetriNetUnfolder]: 12488/16397 cut-off events. [2023-08-30 00:24:15,746 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 00:24:15,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 16397 events. 12488/16397 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 85941 event pairs, 5904 based on Foata normal form. 6/5649 useless extension candidates. Maximal degree in co-relation 32846. Up to 1838 conditions per place. [2023-08-30 00:24:15,807 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 263 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2023-08-30 00:24:15,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 278 transitions, 1268 flow [2023-08-30 00:24:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:24:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:24:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1925 transitions. [2023-08-30 00:24:15,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817317317317317 [2023-08-30 00:24:15,814 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1925 transitions. [2023-08-30 00:24:15,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1925 transitions. [2023-08-30 00:24:15,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:15,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1925 transitions. [2023-08-30 00:24:15,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:15,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:15,824 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:15,824 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 142 flow. Second operand 12 states and 1925 transitions. [2023-08-30 00:24:15,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 278 transitions, 1268 flow [2023-08-30 00:24:15,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 278 transitions, 1263 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:15,828 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-30 00:24:15,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-30 00:24:15,829 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-30 00:24:15,829 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-30 00:24:15,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:15,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:15,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:15,840 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 [2023-08-30 00:24:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:16,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:16,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -883160533, now seen corresponding path program 1 times [2023-08-30 00:24:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:16,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766052850] [2023-08-30 00:24:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:16,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:16,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:16,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:24:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:24:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:16,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:16,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:24:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:16,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:16,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766052850] [2023-08-30 00:24:16,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766052850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:16,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:16,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100455946] [2023-08-30 00:24:16,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:17,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 00:24:17,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:17,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:17,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 00:24:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:20,105 INFO L130 PetriNetUnfolder]: 19046/25547 cut-off events. [2023-08-30 00:24:20,105 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 00:24:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51395 conditions, 25547 events. 19046/25547 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 150364 event pairs, 5962 based on Foata normal form. 0/9605 useless extension candidates. Maximal degree in co-relation 51370. Up to 12945 conditions per place. [2023-08-30 00:24:20,191 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 116 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2023-08-30 00:24:20,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 677 flow [2023-08-30 00:24:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:24:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:24:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1325 transitions. [2023-08-30 00:24:20,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44210877544210875 [2023-08-30 00:24:20,197 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1325 transitions. [2023-08-30 00:24:20,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1325 transitions. [2023-08-30 00:24:20,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:20,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1325 transitions. [2023-08-30 00:24:20,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:20,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:20,205 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:20,205 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 9 states and 1325 transitions. [2023-08-30 00:24:20,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 677 flow [2023-08-30 00:24:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 652 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:24:20,208 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 260 flow [2023-08-30 00:24:20,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-30 00:24:20,209 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 00:24:20,209 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 260 flow [2023-08-30 00:24:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:20,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:20,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:20,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:20,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -883160534, now seen corresponding path program 1 times [2023-08-30 00:24:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090833988] [2023-08-30 00:24:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:20,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:20,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:20,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:20,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:24:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:24:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:20,540 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:24:20,540 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:24:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:20,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:20,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090833988] [2023-08-30 00:24:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090833988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:20,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:20,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383775539] [2023-08-30 00:24:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:20,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:24:20,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:20,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:20,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:24:20,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:21,638 INFO L130 PetriNetUnfolder]: 8201/11381 cut-off events. [2023-08-30 00:24:21,638 INFO L131 PetriNetUnfolder]: For 2202/2599 co-relation queries the response was YES. [2023-08-30 00:24:21,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 11381 events. 8201/11381 cut-off events. For 2202/2599 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64501 event pairs, 4347 based on Foata normal form. 397/6056 useless extension candidates. Maximal degree in co-relation 25380. Up to 11188 conditions per place. [2023-08-30 00:24:21,681 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 00:24:21,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 49 transitions, 344 flow [2023-08-30 00:24:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:24:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:24:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-30 00:24:21,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 00:24:21,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-30 00:24:21,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-30 00:24:21,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:21,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-30 00:24:21,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:21,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:21,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:21,687 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 260 flow. Second operand 4 states and 576 transitions. [2023-08-30 00:24:21,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 49 transitions, 344 flow [2023-08-30 00:24:21,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 49 transitions, 327 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:24:21,692 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 249 flow [2023-08-30 00:24:21,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-30 00:24:21,692 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 00:24:21,692 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 249 flow [2023-08-30 00:24:21,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:21,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:21,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:21,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:21,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:21,902 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:21,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1608170044, now seen corresponding path program 1 times [2023-08-30 00:24:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:21,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112469148] [2023-08-30 00:24:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:21,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:21,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:24:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:24:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:22,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:24:22,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:24:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:22,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:22,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:22,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112469148] [2023-08-30 00:24:22,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112469148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:22,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265663753] [2023-08-30 00:24:22,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:24,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 00:24:24,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:24,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:24,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 00:24:24,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:26,989 INFO L130 PetriNetUnfolder]: 15014/19985 cut-off events. [2023-08-30 00:24:26,989 INFO L131 PetriNetUnfolder]: For 2397/2397 co-relation queries the response was YES. [2023-08-30 00:24:27,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46038 conditions, 19985 events. 15014/19985 cut-off events. For 2397/2397 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 112111 event pairs, 972 based on Foata normal form. 450/11453 useless extension candidates. Maximal degree in co-relation 46011. Up to 6057 conditions per place. [2023-08-30 00:24:27,056 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-08-30 00:24:27,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 630 flow [2023-08-30 00:24:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:24:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:24:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1173 transitions. [2023-08-30 00:24:27,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403153153153153 [2023-08-30 00:24:27,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1173 transitions. [2023-08-30 00:24:27,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1173 transitions. [2023-08-30 00:24:27,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:27,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1173 transitions. [2023-08-30 00:24:27,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.625) internal successors, (1173), 8 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:27,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:27,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:27,067 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 249 flow. Second operand 8 states and 1173 transitions. [2023-08-30 00:24:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 630 flow [2023-08-30 00:24:27,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:24:27,072 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2023-08-30 00:24:27,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-08-30 00:24:27,073 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-30 00:24:27,073 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2023-08-30 00:24:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:27,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:27,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:27,080 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 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:27,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:27,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:27,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998129, now seen corresponding path program 1 times [2023-08-30 00:24:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832085875] [2023-08-30 00:24:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:27,275 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 [2023-08-30 00:24:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:27,276 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:27,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:24:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:24:27,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:27,461 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:24:27,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:24:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:27,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832085875] [2023-08-30 00:24:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832085875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:27,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:24:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217663253] [2023-08-30 00:24:27,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:24:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:24:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:24:28,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:24:28,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:28,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:28,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:24:28,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:29,581 INFO L130 PetriNetUnfolder]: 12187/16357 cut-off events. [2023-08-30 00:24:29,581 INFO L131 PetriNetUnfolder]: For 23291/24703 co-relation queries the response was YES. [2023-08-30 00:24:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45980 conditions, 16357 events. 12187/16357 cut-off events. For 23291/24703 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 89248 event pairs, 6328 based on Foata normal form. 1412/11084 useless extension candidates. Maximal degree in co-relation 45948. Up to 14340 conditions per place. [2023-08-30 00:24:29,777 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-30 00:24:29,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2023-08-30 00:24:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:24:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:24:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-30 00:24:29,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306306306306306 [2023-08-30 00:24:29,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-30 00:24:29,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-30 00:24:29,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:29,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-30 00:24:29,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:29,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:29,784 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:29,784 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 717 transitions. [2023-08-30 00:24:29,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2023-08-30 00:24:29,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:29,804 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2023-08-30 00:24:29,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 00:24:29,805 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 00:24:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2023-08-30 00:24:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:29,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:29,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:29,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:30,016 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:30,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998130, now seen corresponding path program 1 times [2023-08-30 00:24:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:30,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348674121] [2023-08-30 00:24:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:30,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:30,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:30,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:30,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:24:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:24:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:30,192 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 00:24:30,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-30 00:24:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:30,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:30,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348674121] [2023-08-30 00:24:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348674121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:30,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:24:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36131651] [2023-08-30 00:24:30,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:24:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:24:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:24:30,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:24:30,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:30,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:30,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:24:30,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:31,576 INFO L130 PetriNetUnfolder]: 11441/15251 cut-off events. [2023-08-30 00:24:31,577 INFO L131 PetriNetUnfolder]: For 20612/21912 co-relation queries the response was YES. [2023-08-30 00:24:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 15251 events. 11441/15251 cut-off events. For 20612/21912 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 81125 event pairs, 5832 based on Foata normal form. 1300/10306 useless extension candidates. Maximal degree in co-relation 40110. Up to 15062 conditions per place. [2023-08-30 00:24:31,653 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 00:24:31,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2023-08-30 00:24:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 00:24:31,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-08-30 00:24:31,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 00:24:31,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 00:24:31,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:31,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 00:24:31,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:31,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:31,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:31,659 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 441 transitions. [2023-08-30 00:24:31,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2023-08-30 00:24:31,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:24:31,673 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2023-08-30 00:24:31,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2023-08-30 00:24:31,677 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-30 00:24:31,677 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2023-08-30 00:24:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:31,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:31,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:31,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:31,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:31,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:31,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1691660640, now seen corresponding path program 1 times [2023-08-30 00:24:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:31,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974830262] [2023-08-30 00:24:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:31,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:31,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:24:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:24:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:32,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:32,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:24:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:32,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974830262] [2023-08-30 00:24:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974830262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:32,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570897402] [2023-08-30 00:24:32,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:33,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 00:24:33,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:33,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:33,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 00:24:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:35,992 INFO L130 PetriNetUnfolder]: 15405/21123 cut-off events. [2023-08-30 00:24:35,992 INFO L131 PetriNetUnfolder]: For 31851/33943 co-relation queries the response was YES. [2023-08-30 00:24:36,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57061 conditions, 21123 events. 15405/21123 cut-off events. For 31851/33943 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 121446 event pairs, 4989 based on Foata normal form. 2092/16269 useless extension candidates. Maximal degree in co-relation 57029. Up to 12297 conditions per place. [2023-08-30 00:24:36,069 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-30 00:24:36,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2023-08-30 00:24:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:24:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:24:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1293 transitions. [2023-08-30 00:24:36,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314314314314314 [2023-08-30 00:24:36,073 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1293 transitions. [2023-08-30 00:24:36,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1293 transitions. [2023-08-30 00:24:36,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:36,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1293 transitions. [2023-08-30 00:24:36,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:36,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:36,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:36,080 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1293 transitions. [2023-08-30 00:24:36,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2023-08-30 00:24:36,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:36,099 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2023-08-30 00:24:36,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2023-08-30 00:24:36,099 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2023-08-30 00:24:36,099 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2023-08-30 00:24:36,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:36,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:36,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:36,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:36,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:36,308 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:36,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 901875931, now seen corresponding path program 1 times [2023-08-30 00:24:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181782176] [2023-08-30 00:24:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:36,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:36,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:36,311 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:24:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:24:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:36,509 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:24:36,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:24:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:36,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:24:37,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:37,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181782176] [2023-08-30 00:24:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181782176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:37,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:24:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166792629] [2023-08-30 00:24:37,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:37,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:24:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:24:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:24:38,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:24:38,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:38,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:38,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:24:38,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:43,239 INFO L130 PetriNetUnfolder]: 29369/39767 cut-off events. [2023-08-30 00:24:43,239 INFO L131 PetriNetUnfolder]: For 68699/72591 co-relation queries the response was YES. [2023-08-30 00:24:43,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117322 conditions, 39767 events. 29369/39767 cut-off events. For 68699/72591 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 244947 event pairs, 3798 based on Foata normal form. 3892/34435 useless extension candidates. Maximal degree in co-relation 117287. Up to 9937 conditions per place. [2023-08-30 00:24:43,472 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2023-08-30 00:24:43,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2023-08-30 00:24:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:24:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:24:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1292 transitions. [2023-08-30 00:24:43,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43109776443109776 [2023-08-30 00:24:43,476 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1292 transitions. [2023-08-30 00:24:43,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1292 transitions. [2023-08-30 00:24:43,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:43,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1292 transitions. [2023-08-30 00:24:43,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.55555555555554) internal successors, (1292), 9 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:43,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:43,483 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:43,483 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1292 transitions. [2023-08-30 00:24:43,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2023-08-30 00:24:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:24:43,631 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2023-08-30 00:24:43,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2023-08-30 00:24:43,632 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-08-30 00:24:43,633 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2023-08-30 00:24:43,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:43,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:43,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:24:43,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:24:43,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:43,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:24:43,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1369090155, now seen corresponding path program 2 times [2023-08-30 00:24:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485298142] [2023-08-30 00:24:43,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:24:43,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:24:43,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:43,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:24:43,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:24:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:24:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:24:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:24:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:44,044 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:24:44,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:24:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:24:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:24:45,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485298142] [2023-08-30 00:24:45,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485298142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:24:45,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:24:45,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:24:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227512599] [2023-08-30 00:24:45,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:24:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:24:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:24:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:24:53,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:24:53,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:53,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:53,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:24:53,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:04,199 INFO L130 PetriNetUnfolder]: 30001/40923 cut-off events. [2023-08-30 00:25:04,199 INFO L131 PetriNetUnfolder]: For 94516/97333 co-relation queries the response was YES. [2023-08-30 00:25:04,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139302 conditions, 40923 events. 30001/40923 cut-off events. For 94516/97333 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 259728 event pairs, 8809 based on Foata normal form. 3123/35365 useless extension candidates. Maximal degree in co-relation 139263. Up to 15994 conditions per place. [2023-08-30 00:25:04,475 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2023-08-30 00:25:04,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 324 transitions, 2433 flow [2023-08-30 00:25:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:25:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:25:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2658 transitions. [2023-08-30 00:25:04,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42010431484115696 [2023-08-30 00:25:04,484 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2658 transitions. [2023-08-30 00:25:04,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2658 transitions. [2023-08-30 00:25:04,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:04,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2658 transitions. [2023-08-30 00:25:04,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.89473684210526) internal successors, (2658), 19 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:04,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:04,495 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:04,496 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 19 states and 2658 transitions. [2023-08-30 00:25:04,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 324 transitions, 2433 flow [2023-08-30 00:25:04,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 324 transitions, 2214 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 00:25:04,635 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 552 flow [2023-08-30 00:25:04,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2023-08-30 00:25:04,636 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2023-08-30 00:25:04,636 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 552 flow [2023-08-30 00:25:04,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:04,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:04,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:04,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-30 00:25:04,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:04,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:04,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2101571287, now seen corresponding path program 1 times [2023-08-30 00:25:04,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:04,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732441091] [2023-08-30 00:25:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:04,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:04,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:25:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:25:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:05,146 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:05,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:05,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:05,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732441091] [2023-08-30 00:25:05,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732441091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:05,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:05,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:25:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917893672] [2023-08-30 00:25:05,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:05,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:25:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:25:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:25:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:25:09,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:09,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:09,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:25:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:16,573 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2023-08-30 00:25:16,573 INFO L131 PetriNetUnfolder]: For 154601/161405 co-relation queries the response was YES. [2023-08-30 00:25:16,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143635 conditions, 38781 events. 27287/38781 cut-off events. For 154601/161405 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 248029 event pairs, 17843 based on Foata normal form. 6804/40816 useless extension candidates. Maximal degree in co-relation 143589. Up to 22069 conditions per place. [2023-08-30 00:25:16,894 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2023-08-30 00:25:16,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1388 flow [2023-08-30 00:25:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:25:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:25:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1502 transitions. [2023-08-30 00:25:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41004641004641007 [2023-08-30 00:25:16,900 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1502 transitions. [2023-08-30 00:25:16,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1502 transitions. [2023-08-30 00:25:16,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:16,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1502 transitions. [2023-08-30 00:25:16,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.54545454545453) internal successors, (1502), 11 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:16,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:16,908 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:16,909 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 552 flow. Second operand 11 states and 1502 transitions. [2023-08-30 00:25:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1388 flow [2023-08-30 00:25:17,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1299 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-30 00:25:17,059 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 545 flow [2023-08-30 00:25:17,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2023-08-30 00:25:17,059 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2023-08-30 00:25:17,059 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 545 flow [2023-08-30 00:25:17,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:17,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:17,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:17,067 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 [2023-08-30 00:25:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:17,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:17,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash -724197799, now seen corresponding path program 1 times [2023-08-30 00:25:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:17,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933309936] [2023-08-30 00:25:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:25:17,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:17,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:17,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:25:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:25:17,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:25:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:17,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933309936] [2023-08-30 00:25:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933309936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:17,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:25:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846186225] [2023-08-30 00:25:17,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:25:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:25:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:25:18,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 00:25:18,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 545 flow. Second operand has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:18,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:18,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 00:25:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:22,805 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2023-08-30 00:25:22,805 INFO L131 PetriNetUnfolder]: For 124036/129593 co-relation queries the response was YES. [2023-08-30 00:25:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123942 conditions, 30859 events. 21755/30859 cut-off events. For 124036/129593 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191740 event pairs, 11742 based on Foata normal form. 5645/34864 useless extension candidates. Maximal degree in co-relation 123896. Up to 22588 conditions per place. [2023-08-30 00:25:23,014 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2023-08-30 00:25:23,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1341 flow [2023-08-30 00:25:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:25:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:25:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1422 transitions. [2023-08-30 00:25:23,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2023-08-30 00:25:23,018 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1422 transitions. [2023-08-30 00:25:23,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1422 transitions. [2023-08-30 00:25:23,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:23,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1422 transitions. [2023-08-30 00:25:23,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.2) internal successors, (1422), 10 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:23,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:23,024 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:23,024 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 545 flow. Second operand 10 states and 1422 transitions. [2023-08-30 00:25:23,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1341 flow [2023-08-30 00:25:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1320 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 00:25:23,281 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 564 flow [2023-08-30 00:25:23,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2023-08-30 00:25:23,281 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 00:25:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 564 flow [2023-08-30 00:25:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:23,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:23,282 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:25:23,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:23,492 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:23,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1525925856, now seen corresponding path program 2 times [2023-08-30 00:25:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:23,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120647728] [2023-08-30 00:25:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:25:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:23,494 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:25:23,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:25:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:25:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:23,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:23,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:24,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:24,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:24,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120647728] [2023-08-30 00:25:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120647728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:24,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:25:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120030776] [2023-08-30 00:25:24,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:24,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:25:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:25:24,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:25:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 00:25:33,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:33,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:33,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 00:25:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:47,563 INFO L130 PetriNetUnfolder]: 25273/34870 cut-off events. [2023-08-30 00:25:47,563 INFO L131 PetriNetUnfolder]: For 151489/155189 co-relation queries the response was YES. [2023-08-30 00:25:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154012 conditions, 34870 events. 25273/34870 cut-off events. For 151489/155189 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 220563 event pairs, 8306 based on Foata normal form. 3902/35259 useless extension candidates. Maximal degree in co-relation 153964. Up to 15532 conditions per place. [2023-08-30 00:25:47,818 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2023-08-30 00:25:47,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 2927 flow [2023-08-30 00:25:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:25:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:25:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2614 transitions. [2023-08-30 00:25:47,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41314999209736053 [2023-08-30 00:25:47,822 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2614 transitions. [2023-08-30 00:25:47,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2614 transitions. [2023-08-30 00:25:47,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:47,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2614 transitions. [2023-08-30 00:25:47,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:47,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:47,833 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:47,833 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 564 flow. Second operand 19 states and 2614 transitions. [2023-08-30 00:25:47,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 2927 flow [2023-08-30 00:25:48,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 349 transitions, 2908 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:25:48,232 INFO L231 Difference]: Finished difference. Result has 144 places, 87 transitions, 704 flow [2023-08-30 00:25:48,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=144, PETRI_TRANSITIONS=87} [2023-08-30 00:25:48,233 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2023-08-30 00:25:48,233 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 87 transitions, 704 flow [2023-08-30 00:25:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:48,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:48,234 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 00:25:48,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:48,444 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:25:48,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1637399693, now seen corresponding path program 3 times [2023-08-30 00:25:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411957976] [2023-08-30 00:25:48,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:25:48,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:25:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:48,446 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:25:48,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:25:48,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:25:48,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:25:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:48,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:25:48,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:25:49,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 00:25:49,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 00:25:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:49,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-30 00:25:49,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 00:25:49,384 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:25:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:25:50,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:50,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411957976] [2023-08-30 00:25:50,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411957976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:50,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:50,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:25:50,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899546461] [2023-08-30 00:25:50,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:25:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:25:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:26:01,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:26:01,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 704 flow. Second operand has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:01,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:01,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:26:01,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:15,795 INFO L130 PetriNetUnfolder]: 32291/45201 cut-off events. [2023-08-30 00:26:15,796 INFO L131 PetriNetUnfolder]: For 198170/202412 co-relation queries the response was YES. [2023-08-30 00:26:16,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213190 conditions, 45201 events. 32291/45201 cut-off events. For 198170/202412 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 304902 event pairs, 10467 based on Foata normal form. 4636/45856 useless extension candidates. Maximal degree in co-relation 213136. Up to 19699 conditions per place. [2023-08-30 00:26:16,205 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 461 selfloop transitions, 42 changer transitions 0/509 dead transitions. [2023-08-30 00:26:16,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 509 transitions, 4560 flow [2023-08-30 00:26:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:26:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:26:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3456 transitions. [2023-08-30 00:26:16,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 00:26:16,210 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3456 transitions. [2023-08-30 00:26:16,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3456 transitions. [2023-08-30 00:26:16,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:16,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3456 transitions. [2023-08-30 00:26:16,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:16,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:16,221 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:16,222 INFO L175 Difference]: Start difference. First operand has 144 places, 87 transitions, 704 flow. Second operand 24 states and 3456 transitions. [2023-08-30 00:26:16,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 509 transitions, 4560 flow [2023-08-30 00:26:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 509 transitions, 4266 flow, removed 140 selfloop flow, removed 5 redundant places. [2023-08-30 00:26:17,466 INFO L231 Difference]: Finished difference. Result has 172 places, 111 transitions, 1053 flow [2023-08-30 00:26:17,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1053, PETRI_PLACES=172, PETRI_TRANSITIONS=111} [2023-08-30 00:26:17,467 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2023-08-30 00:26:17,467 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 111 transitions, 1053 flow [2023-08-30 00:26:17,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:17,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:17,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:17,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:17,673 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:17,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1421077346, now seen corresponding path program 2 times [2023-08-30 00:26:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558048018] [2023-08-30 00:26:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:26:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:17,675 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:26:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:26:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:26:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:17,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:17,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:18,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:19,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:19,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558048018] [2023-08-30 00:26:19,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558048018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:19,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 00:26:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456222088] [2023-08-30 00:26:19,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:19,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:26:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:26:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:26:30,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 00:26:30,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 111 transitions, 1053 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:30,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:30,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 00:26:30,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:26:45,256 INFO L130 PetriNetUnfolder]: 37249/52863 cut-off events. [2023-08-30 00:26:45,256 INFO L131 PetriNetUnfolder]: For 345139/353851 co-relation queries the response was YES. [2023-08-30 00:26:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259242 conditions, 52863 events. 37249/52863 cut-off events. For 345139/353851 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 357398 event pairs, 14073 based on Foata normal form. 10336/63184 useless extension candidates. Maximal degree in co-relation 259177. Up to 14724 conditions per place. [2023-08-30 00:26:45,766 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 414 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2023-08-30 00:26:45,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 449 transitions, 4650 flow [2023-08-30 00:26:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:26:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:26:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2582 transitions. [2023-08-30 00:26:45,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40809230282914494 [2023-08-30 00:26:45,771 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2582 transitions. [2023-08-30 00:26:45,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2582 transitions. [2023-08-30 00:26:45,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:45,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2582 transitions. [2023-08-30 00:26:45,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.89473684210526) internal successors, (2582), 19 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:45,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:45,778 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:45,778 INFO L175 Difference]: Start difference. First operand has 172 places, 111 transitions, 1053 flow. Second operand 19 states and 2582 transitions. [2023-08-30 00:26:45,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 449 transitions, 4650 flow [2023-08-30 00:26:46,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 449 transitions, 4524 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-30 00:26:46,828 INFO L231 Difference]: Finished difference. Result has 188 places, 121 transitions, 1180 flow [2023-08-30 00:26:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1180, PETRI_PLACES=188, PETRI_TRANSITIONS=121} [2023-08-30 00:26:46,828 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-08-30 00:26:46,828 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 121 transitions, 1180 flow [2023-08-30 00:26:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:46,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:46,829 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:26:46,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:26:47,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:47,030 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:26:47,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:47,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1076024012, now seen corresponding path program 3 times [2023-08-30 00:26:47,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:47,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939677251] [2023-08-30 00:26:47,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:26:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:26:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:47,032 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:26:47,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:26:47,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:26:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:26:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:26:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:47,277 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:26:47,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:26:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:47,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:26:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:26:49,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:49,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939677251] [2023-08-30 00:26:49,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939677251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:26:49,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:26:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:26:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793239040] [2023-08-30 00:26:49,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:26:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:26:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:26:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:27:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:27:01,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 121 transitions, 1180 flow. Second operand has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:01,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:01,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:27:01,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:31,273 INFO L130 PetriNetUnfolder]: 70299/97281 cut-off events. [2023-08-30 00:27:31,273 INFO L131 PetriNetUnfolder]: For 845890/865098 co-relation queries the response was YES. [2023-08-30 00:27:32,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535547 conditions, 97281 events. 70299/97281 cut-off events. For 845890/865098 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 653391 event pairs, 47425 based on Foata normal form. 19169/116142 useless extension candidates. Maximal degree in co-relation 535477. Up to 28629 conditions per place. [2023-08-30 00:27:32,680 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 733 selfloop transitions, 24 changer transitions 0/770 dead transitions. [2023-08-30 00:27:32,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 770 transitions, 7471 flow [2023-08-30 00:27:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:27:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:27:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3782 transitions. [2023-08-30 00:27:32,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47322322322322324 [2023-08-30 00:27:32,685 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3782 transitions. [2023-08-30 00:27:32,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3782 transitions. [2023-08-30 00:27:32,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:32,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3782 transitions. [2023-08-30 00:27:32,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.58333333333334) internal successors, (3782), 24 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:32,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:32,693 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:32,693 INFO L175 Difference]: Start difference. First operand has 188 places, 121 transitions, 1180 flow. Second operand 24 states and 3782 transitions. [2023-08-30 00:27:32,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 770 transitions, 7471 flow [2023-08-30 00:27:40,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 770 transitions, 7411 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-30 00:27:40,656 INFO L231 Difference]: Finished difference. Result has 215 places, 134 transitions, 1331 flow [2023-08-30 00:27:40,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1331, PETRI_PLACES=215, PETRI_TRANSITIONS=134} [2023-08-30 00:27:40,657 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-08-30 00:27:40,657 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 134 transitions, 1331 flow [2023-08-30 00:27:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:40,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:40,658 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:27:40,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:40,859 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:27:40,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1083547680, now seen corresponding path program 2 times [2023-08-30 00:27:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:40,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157285016] [2023-08-30 00:27:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:27:40,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:40,860 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:40,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:27:40,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:27:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:27:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:27:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:41,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:41,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:27:41,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:41,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157285016] [2023-08-30 00:27:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157285016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:41,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:27:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254334065] [2023-08-30 00:27:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:27:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:27:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:27:41,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:27:41,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 134 transitions, 1331 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:41,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:41,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:27:41,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:58,010 INFO L130 PetriNetUnfolder]: 73161/102966 cut-off events. [2023-08-30 00:27:58,010 INFO L131 PetriNetUnfolder]: For 843745/861767 co-relation queries the response was YES. [2023-08-30 00:27:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543555 conditions, 102966 events. 73161/102966 cut-off events. For 843745/861767 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 690196 event pairs, 44685 based on Foata normal form. 26802/129666 useless extension candidates. Maximal degree in co-relation 543472. Up to 85727 conditions per place. [2023-08-30 00:27:59,502 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 169 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2023-08-30 00:27:59,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 198 transitions, 2300 flow [2023-08-30 00:27:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:27:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:27:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-08-30 00:27:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42042042042042044 [2023-08-30 00:27:59,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-08-30 00:27:59,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-08-30 00:27:59,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:59,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-08-30 00:27:59,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:59,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:59,506 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:59,506 INFO L175 Difference]: Start difference. First operand has 215 places, 134 transitions, 1331 flow. Second operand 5 states and 700 transitions. [2023-08-30 00:27:59,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 198 transitions, 2300 flow [2023-08-30 00:28:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 198 transitions, 2244 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 00:28:08,375 INFO L231 Difference]: Finished difference. Result has 209 places, 134 transitions, 1339 flow [2023-08-30 00:28:08,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=209, PETRI_TRANSITIONS=134} [2023-08-30 00:28:08,375 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-08-30 00:28:08,376 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 134 transitions, 1339 flow [2023-08-30 00:28:08,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:08,376 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 00:28:08,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:08,577 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:28:08,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 259241826, now seen corresponding path program 4 times [2023-08-30 00:28:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119598961] [2023-08-30 00:28:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:28:08,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:08,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:08,579 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:28:08,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:28:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:28:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:08,778 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:08,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:09,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:10,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:10,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119598961] [2023-08-30 00:28:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119598961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:10,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:28:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694388600] [2023-08-30 00:28:10,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:28:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:28:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:28:21,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 00:28:21,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 134 transitions, 1339 flow. Second operand has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:21,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:21,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 00:28:21,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:03,599 INFO L130 PetriNetUnfolder]: 97421/134773 cut-off events. [2023-08-30 00:29:03,599 INFO L131 PetriNetUnfolder]: For 1529908/1562653 co-relation queries the response was YES. [2023-08-30 00:29:05,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778132 conditions, 134773 events. 97421/134773 cut-off events. For 1529908/1562653 co-relation queries the response was YES. Maximal size of possible extension queue 2569. Compared 919608 event pairs, 10919 based on Foata normal form. 49489/184071 useless extension candidates. Maximal degree in co-relation 778047. Up to 29214 conditions per place. [2023-08-30 00:29:05,994 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 711 selfloop transitions, 56 changer transitions 0/775 dead transitions. [2023-08-30 00:29:05,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 775 transitions, 7764 flow [2023-08-30 00:29:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:29:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:29:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5241 transitions. [2023-08-30 00:29:06,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42537131726320915 [2023-08-30 00:29:06,003 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5241 transitions. [2023-08-30 00:29:06,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5241 transitions. [2023-08-30 00:29:06,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:06,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5241 transitions. [2023-08-30 00:29:06,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.64864864864865) internal successors, (5241), 37 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:06,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:06,022 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:06,022 INFO L175 Difference]: Start difference. First operand has 209 places, 134 transitions, 1339 flow. Second operand 37 states and 5241 transitions. [2023-08-30 00:29:06,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 775 transitions, 7764 flow [2023-08-30 00:29:14,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 775 transitions, 7544 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-30 00:29:14,280 INFO L231 Difference]: Finished difference. Result has 246 places, 147 transitions, 1572 flow [2023-08-30 00:29:14,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1572, PETRI_PLACES=246, PETRI_TRANSITIONS=147} [2023-08-30 00:29:14,280 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 189 predicate places. [2023-08-30 00:29:14,280 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 147 transitions, 1572 flow [2023-08-30 00:29:14,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:14,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:14,281 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2023-08-30 00:29:14,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:29:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:14,482 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:29:14,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -755102101, now seen corresponding path program 5 times [2023-08-30 00:29:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266993208] [2023-08-30 00:29:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:29:14,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:14,483 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:29:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 00:29:14,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:29:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:14,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:29:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:14,717 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:29:14,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:29:14,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 00:29:15,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 00:29:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:29:15,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:29:15,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-30 00:29:15,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 00:29:15,296 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:29:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:29:16,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266993208] [2023-08-30 00:29:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266993208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:29:16,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:29:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2023-08-30 00:29:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199015638] [2023-08-30 00:29:16,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:29:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:29:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:29:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:29:33,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:29:33,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 147 transitions, 1572 flow. Second operand has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:33,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:33,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:29:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:03,112 INFO L130 PetriNetUnfolder]: 93937/130008 cut-off events. [2023-08-30 00:30:03,112 INFO L131 PetriNetUnfolder]: For 1370752/1400784 co-relation queries the response was YES. [2023-08-30 00:30:04,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770431 conditions, 130008 events. 93937/130008 cut-off events. For 1370752/1400784 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 855425 event pairs, 59453 based on Foata normal form. 30163/159686 useless extension candidates. Maximal degree in co-relation 770342. Up to 113916 conditions per place. [2023-08-30 00:30:05,273 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 400 selfloop transitions, 41 changer transitions 0/449 dead transitions. [2023-08-30 00:30:05,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 449 transitions, 4505 flow [2023-08-30 00:30:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 00:30:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 00:30:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3254 transitions. [2023-08-30 00:30:05,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248596422509466 [2023-08-30 00:30:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3254 transitions. [2023-08-30 00:30:05,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3254 transitions. [2023-08-30 00:30:05,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:05,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3254 transitions. [2023-08-30 00:30:05,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.47826086956522) internal successors, (3254), 23 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,288 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:05,288 INFO L175 Difference]: Start difference. First operand has 246 places, 147 transitions, 1572 flow. Second operand 23 states and 3254 transitions. [2023-08-30 00:30:05,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 449 transitions, 4505 flow [2023-08-30 00:31:08,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 4242 flow, removed 58 selfloop flow, removed 29 redundant places. [2023-08-30 00:31:08,109 INFO L231 Difference]: Finished difference. Result has 238 places, 151 transitions, 1458 flow [2023-08-30 00:31:08,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1458, PETRI_PLACES=238, PETRI_TRANSITIONS=151} [2023-08-30 00:31:08,109 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 181 predicate places. [2023-08-30 00:31:08,109 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 151 transitions, 1458 flow [2023-08-30 00:31:08,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:08,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:31:08,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:31:08,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:31:08,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:08,311 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:31:08,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:31:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1128839689, now seen corresponding path program 3 times [2023-08-30 00:31:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:31:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277766094] [2023-08-30 00:31:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:31:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:31:08,312 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:31:08,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 00:31:08,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:31:08,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:31:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:31:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:31:08,556 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:31:08,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:31:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:31:08,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:31:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:31:11,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:31:11,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277766094] [2023-08-30 00:31:11,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277766094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:31:11,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:31:11,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:31:11,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384273873] [2023-08-30 00:31:11,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:31:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:31:11,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:31:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:31:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:31:16,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 00:31:16,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 151 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:16,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:31:16,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 00:31:16,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:31:44,974 INFO L130 PetriNetUnfolder]: 121605/168153 cut-off events. [2023-08-30 00:31:44,974 INFO L131 PetriNetUnfolder]: For 1342317/1362805 co-relation queries the response was YES. [2023-08-30 00:31:46,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862066 conditions, 168153 events. 121605/168153 cut-off events. For 1342317/1362805 co-relation queries the response was YES. Maximal size of possible extension queue 2913. Compared 1150519 event pairs, 18217 based on Foata normal form. 32254/200302 useless extension candidates. Maximal degree in co-relation 861983. Up to 56108 conditions per place. [2023-08-30 00:31:47,583 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 353 selfloop transitions, 26 changer transitions 0/387 dead transitions. [2023-08-30 00:31:47,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 387 transitions, 4347 flow [2023-08-30 00:31:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:31:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:31:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2023-08-30 00:31:47,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212784212784213 [2023-08-30 00:31:47,586 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2023-08-30 00:31:47,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2023-08-30 00:31:47,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:31:47,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2023-08-30 00:31:47,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:47,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:47,590 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:47,590 INFO L175 Difference]: Start difference. First operand has 238 places, 151 transitions, 1458 flow. Second operand 7 states and 982 transitions. [2023-08-30 00:31:47,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 387 transitions, 4347 flow [2023-08-30 00:32:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 387 transitions, 4161 flow, removed 28 selfloop flow, removed 16 redundant places. [2023-08-30 00:32:33,004 INFO L231 Difference]: Finished difference. Result has 228 places, 152 transitions, 1463 flow [2023-08-30 00:32:33,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=228, PETRI_TRANSITIONS=152} [2023-08-30 00:32:33,005 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 171 predicate places. [2023-08-30 00:32:33,005 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 152 transitions, 1463 flow [2023-08-30 00:32:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:33,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:32:33,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:32:33,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:32:33,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:33,207 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:32:33,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:32:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash -33945372, now seen corresponding path program 3 times [2023-08-30 00:32:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:32:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902337305] [2023-08-30 00:32:33,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:32:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:32:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:32:33,208 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:32:33,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 00:32:33,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:32:33,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:32:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:32:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:32:33,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:32:33,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:32:33,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 00:32:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:32:33,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:32:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 00:32:33,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:32:33,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902337305] [2023-08-30 00:32:33,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902337305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:32:33,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:32:33,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 00:32:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499085284] [2023-08-30 00:32:33,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:32:33,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:32:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:32:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:32:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:32:37,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:32:37,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 152 transitions, 1463 flow. Second operand has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:37,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:32:37,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:32:37,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:05,848 INFO L130 PetriNetUnfolder]: 111383/154139 cut-off events. [2023-08-30 00:33:05,848 INFO L131 PetriNetUnfolder]: For 1890015/1912122 co-relation queries the response was YES. [2023-08-30 00:33:08,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826428 conditions, 154139 events. 111383/154139 cut-off events. For 1890015/1912122 co-relation queries the response was YES. Maximal size of possible extension queue 2677. Compared 1039964 event pairs, 50024 based on Foata normal form. 22160/176090 useless extension candidates. Maximal degree in co-relation 826344. Up to 92476 conditions per place. [2023-08-30 00:33:09,373 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 272 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2023-08-30 00:33:09,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 304 transitions, 3114 flow [2023-08-30 00:33:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:33:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:33:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1920 transitions. [2023-08-30 00:33:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118404118404118 [2023-08-30 00:33:09,405 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1920 transitions. [2023-08-30 00:33:09,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1920 transitions. [2023-08-30 00:33:09,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:09,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1920 transitions. [2023-08-30 00:33:09,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.14285714285714) internal successors, (1920), 14 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:09,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:09,413 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:09,413 INFO L175 Difference]: Start difference. First operand has 228 places, 152 transitions, 1463 flow. Second operand 14 states and 1920 transitions. [2023-08-30 00:33:09,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 304 transitions, 3114 flow [2023-08-30 00:34:12,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 3032 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 00:34:12,642 INFO L231 Difference]: Finished difference. Result has 241 places, 151 transitions, 1470 flow [2023-08-30 00:34:12,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1470, PETRI_PLACES=241, PETRI_TRANSITIONS=151} [2023-08-30 00:34:12,642 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 184 predicate places. [2023-08-30 00:34:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 151 transitions, 1470 flow [2023-08-30 00:34:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:12,643 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:34:12,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:34:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:12,847 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:34:12,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1356686679, now seen corresponding path program 4 times [2023-08-30 00:34:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:12,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017412794] [2023-08-30 00:34:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:34:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:12,849 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:34:12,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 00:34:12,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:34:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:34:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:34:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:13,056 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:34:13,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:34:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:13,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:15,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:15,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017412794] [2023-08-30 00:34:15,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017412794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:15,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:15,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:34:15,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752575912] [2023-08-30 00:34:15,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:15,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:34:15,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:34:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:34:31,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 00:34:31,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 151 transitions, 1470 flow. Second operand has 24 states, 24 states have (on average 130.25) internal successors, (3126), 24 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:31,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:31,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 00:34:31,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:35:41,303 INFO L130 PetriNetUnfolder]: 198907/269947 cut-off events. [2023-08-30 00:35:41,303 INFO L131 PetriNetUnfolder]: For 2939914/2977584 co-relation queries the response was YES. [2023-08-30 00:35:44,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546777 conditions, 269947 events. 198907/269947 cut-off events. For 2939914/2977584 co-relation queries the response was YES. Maximal size of possible extension queue 4349. Compared 1869514 event pairs, 19389 based on Foata normal form. 58106/327896 useless extension candidates. Maximal degree in co-relation 1546689. Up to 60379 conditions per place. [2023-08-30 00:35:46,131 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 847 selfloop transitions, 52 changer transitions 0/909 dead transitions. [2023-08-30 00:35:46,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 909 transitions, 9346 flow [2023-08-30 00:35:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:35:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:35:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5045 transitions. [2023-08-30 00:35:46,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208375041708375 [2023-08-30 00:35:46,135 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5045 transitions. [2023-08-30 00:35:46,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5045 transitions. [2023-08-30 00:35:46,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:35:46,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5045 transitions. [2023-08-30 00:35:46,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 140.13888888888889) internal successors, (5045), 36 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:46,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:46,151 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:46,151 INFO L175 Difference]: Start difference. First operand has 241 places, 151 transitions, 1470 flow. Second operand 36 states and 5045 transitions. [2023-08-30 00:35:46,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 909 transitions, 9346 flow Killed by 15