./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.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-buffer-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 00:21:18,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:21:18,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:21:18,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:21:18,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:21:18,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:21:18,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:21:18,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:21:18,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:21:18,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:21:18,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:21:18,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:21:18,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:21:18,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:21:18,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:21:18,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:21:18,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:21:18,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:21:18,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:21:18,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:21:18,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:21:18,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:21:18,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:21:18,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:21:18,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:21:18,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:21:18,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:21:18,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:21:18,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:21:18,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:21:18,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:21:18,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:21:18,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:21:18,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:21:18,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:21:18,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:21:18,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:21:18,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:21:18,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:21:18,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:21:18,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:21:18,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:21:18,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:21:18,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:21:18,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:21:18,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:21:18,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:21:18,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:21:18,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:21:18,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:21:18,269 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:21:18,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:21:18,270 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:21:18,270 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:21:18,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:21:18,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:21:18,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:21:18,271 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:21:18,272 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:21:18,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:21:18,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:21:18,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:21:18,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:21:18,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:21:18,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:21:18,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:21:18,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:21:18,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:21:18,274 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:21:18,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:21:18,274 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:21:18,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:21:18,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:21:18,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:21:18,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:21:18,618 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:21:18,619 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:21:18,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 00:21:19,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:21:19,891 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:21:19,891 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 00:21:19,897 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c4ac5f2/f8c6952a185c4a5abc51e563effd5945/FLAG0bc7865a7 [2023-08-30 00:21:19,911 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c4ac5f2/f8c6952a185c4a5abc51e563effd5945 [2023-08-30 00:21:19,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:21:19,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:21:19,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:19,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:21:19,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:21:19,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:19" (1/1) ... [2023-08-30 00:21:19,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f57601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:19, skipping insertion in model container [2023-08-30 00:21:19,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:19" (1/1) ... [2023-08-30 00:21:19,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:21:19,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:20,113 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-buffer-series.wvr.c[4351,4364] [2023-08-30 00:21:20,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:20,143 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 00:21:20,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6769018c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:20, skipping insertion in model container [2023-08-30 00:21:20,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:20,145 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:21:20,147 INFO L158 Benchmark]: Toolchain (without parser) took 231.18ms. Allocated memory is still 90.2MB. Free memory was 68.0MB in the beginning and 57.0MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 00:21:20,147 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 37.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:21:20,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.06ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 57.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:21:20,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 37.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.06ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 57.0MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: 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-buffer-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 00:21:21,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:21:21,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:21:21,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:21:21,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:21:21,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:21:21,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:21:21,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:21:21,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:21:21,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:21:21,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:21:21,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:21:21,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:21:21,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:21:21,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:21:21,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:21:21,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:21:21,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:21:21,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:21:21,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:21:21,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:21:21,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:21:21,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:21:21,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:21:21,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:21:21,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:21:21,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:21:21,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:21:21,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:21:21,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:21:21,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:21:21,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:21:21,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:21:21,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:21:21,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:21:21,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:21:21,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:21:21,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:21:21,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:21:21,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:21:21,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:21:21,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:21:21,971 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:21:21,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:21:21,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:21:21,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:21:21,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:21:21,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:21:21,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:21:21,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:21:21,975 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:21:21,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:21:21,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:21:21,977 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:21:21,977 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:21:21,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:21:21,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:21:21,977 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:21:21,978 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:21:21,978 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:21:21,978 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:21:21,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:21:21,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:21:21,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:21:21,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:21:21,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:21:21,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:21:21,979 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:21:21,980 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:21:21,980 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:21:21,980 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:21:21,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:21:21,980 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:21:21,981 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:21:21,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:21:22,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:21:22,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:21:22,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:21:22,310 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:21:22,311 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:21:22,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 00:21:23,420 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:21:23,626 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:21:23,627 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 00:21:23,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5bd71d17/4b0cf85bbb0845bdbc2ea73e176a8d55/FLAGa590ed292 [2023-08-30 00:21:23,654 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5bd71d17/4b0cf85bbb0845bdbc2ea73e176a8d55 [2023-08-30 00:21:23,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:21:23,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:21:23,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:23,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:21:23,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:21:23,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:23" (1/1) ... [2023-08-30 00:21:23,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b1e8905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:23, skipping insertion in model container [2023-08-30 00:21:23,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:21:23" (1/1) ... [2023-08-30 00:21:23,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:21:23,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:23,912 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-buffer-series.wvr.c[4351,4364] [2023-08-30 00:21:23,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:23,945 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:21:23,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:21:23,983 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-buffer-series.wvr.c[4351,4364] [2023-08-30 00:21:23,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:23,999 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:21:24,030 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-buffer-series.wvr.c[4351,4364] [2023-08-30 00:21:24,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:21:24,051 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:21:24,052 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:21:24,059 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:21:24,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24 WrapperNode [2023-08-30 00:21:24,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:21:24,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:21:24,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:21:24,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:21:24,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,117 INFO L138 Inliner]: procedures = 29, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 348 [2023-08-30 00:21:24,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:21:24,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:21:24,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:21:24,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:21:24,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:21:24,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:21:24,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:21:24,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:21:24,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (1/1) ... [2023-08-30 00:21:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:21:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:21:24,198 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 00:21:24,232 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 00:21:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:21:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:21:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:21:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:21:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:21:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:21:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:21:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:21:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:21:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:21:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:21:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:21:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:21:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:21:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:21:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:21:24,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:21:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:21:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:21:24,252 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 00:21:24,420 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:21:24,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:21:25,160 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:21:25,401 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:21:25,402 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 00:21:25,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:21:25 BoogieIcfgContainer [2023-08-30 00:21:25,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:21:25,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:21:25,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:21:25,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:21:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:21:23" (1/3) ... [2023-08-30 00:21:25,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b94657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:21:25, skipping insertion in model container [2023-08-30 00:21:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:21:24" (2/3) ... [2023-08-30 00:21:25,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b94657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:21:25, skipping insertion in model container [2023-08-30 00:21:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:21:25" (3/3) ... [2023-08-30 00:21:25,412 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-08-30 00:21:25,426 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:21:25,427 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 00:21:25,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:21:25,540 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:21:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 285 transitions, 602 flow [2023-08-30 00:21:25,699 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2023-08-30 00:21:25,699 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:21:25,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 281 events. 22/281 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-08-30 00:21:25,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 285 transitions, 602 flow [2023-08-30 00:21:25,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 277 transitions, 578 flow [2023-08-30 00:21:25,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:21:25,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 277 transitions, 578 flow [2023-08-30 00:21:25,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 277 transitions, 578 flow [2023-08-30 00:21:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 277 transitions, 578 flow [2023-08-30 00:21:25,815 INFO L130 PetriNetUnfolder]: 22/277 cut-off events. [2023-08-30 00:21:25,816 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:21:25,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 277 events. 22/277 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 311 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-08-30 00:21:25,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 4104 [2023-08-30 00:21:52,736 INFO L134 LiptonReduction]: Checked pairs total: 8697 [2023-08-30 00:21:52,736 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-30 00:21:52,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:21:52,753 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;@1e0e90c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:21:52,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-30 00:21:52,756 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:21:52,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:21:52,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:52,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:21:52,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:21:52,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:52,761 INFO L85 PathProgramCache]: Analyzing trace with hash 43390, now seen corresponding path program 1 times [2023-08-30 00:21:52,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396884333] [2023-08-30 00:21:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:52,776 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 00:21:52,786 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 00:21:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:21:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:53,093 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:21:53,094 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:21:53,138 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 00:21:53,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:53,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396884333] [2023-08-30 00:21:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396884333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:53,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461448743] [2023-08-30 00:21:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:53,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:53,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-08-30 00:21:53,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:53,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:53,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-08-30 00:21:53,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:58,829 INFO L130 PetriNetUnfolder]: 38573/47848 cut-off events. [2023-08-30 00:21:58,830 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2023-08-30 00:21:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95959 conditions, 47848 events. 38573/47848 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 3592. Compared 254278 event pairs, 25706 based on Foata normal form. 0/12053 useless extension candidates. Maximal degree in co-relation 88338. Up to 47088 conditions per place. [2023-08-30 00:21:59,265 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 00:21:59,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 292 flow [2023-08-30 00:21:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-30 00:21:59,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43797766019988243 [2023-08-30 00:21:59,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-30 00:21:59,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-30 00:21:59,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:59,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-30 00:21:59,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:59,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:59,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:59,313 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 176 flow. Second operand 3 states and 745 transitions. [2023-08-30 00:21:59,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 292 flow [2023-08-30 00:21:59,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:21:59,443 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 150 flow [2023-08-30 00:21:59,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-30 00:21:59,450 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -12 predicate places. [2023-08-30 00:21:59,450 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 150 flow [2023-08-30 00:21:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:59,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:59,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:21:59,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:59,666 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 00:21:59,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:21:59,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 43391, now seen corresponding path program 1 times [2023-08-30 00:21:59,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607783155] [2023-08-30 00:21:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:59,670 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 00:21:59,675 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 00:21:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:21:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:59,934 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:21:59,934 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:21:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:21:59,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:59,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607783155] [2023-08-30 00:21:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607783155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:59,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711935465] [2023-08-30 00:21:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:22:00,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-08-30 00:22:00,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:00,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:00,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-08-30 00:22:00,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:08,563 INFO L130 PetriNetUnfolder]: 77145/95692 cut-off events. [2023-08-30 00:22:08,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:22:08,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190654 conditions, 95692 events. 77145/95692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6820. Compared 544318 event pairs, 51412 based on Foata normal form. 0/25089 useless extension candidates. Maximal degree in co-relation 190648. Up to 47089 conditions per place. [2023-08-30 00:22:09,089 INFO L137 encePairwiseOnDemand]: 558/567 looper letters, 118 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-08-30 00:22:09,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 130 transitions, 526 flow [2023-08-30 00:22:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:22:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:22:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-08-30 00:22:09,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714873603762493 [2023-08-30 00:22:09,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-08-30 00:22:09,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-08-30 00:22:09,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:09,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-08-30 00:22:09,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:09,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:09,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:09,101 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 150 flow. Second operand 3 states and 802 transitions. [2023-08-30 00:22:09,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 130 transitions, 526 flow [2023-08-30 00:22:09,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 130 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:22:09,104 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 199 flow [2023-08-30 00:22:09,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-30 00:22:09,105 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -9 predicate places. [2023-08-30 00:22:09,105 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 199 flow [2023-08-30 00:22:09,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:09,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:09,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:22:09,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:09,317 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 00:22:09,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:22:09,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1347592, now seen corresponding path program 1 times [2023-08-30 00:22:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310049834] [2023-08-30 00:22:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:09,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:09,322 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 00:22:09,325 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 00:22:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:22:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:09,574 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:22:09,574 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:22:09,653 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 00:22:09,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:09,848 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 00:22:09,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:09,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310049834] [2023-08-30 00:22:09,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310049834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:09,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:09,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:22:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248688055] [2023-08-30 00:22:09,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:22:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:22:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:22:10,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 567 [2023-08-30 00:22:10,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:10,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:10,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 567 [2023-08-30 00:22:10,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:23,843 INFO L130 PetriNetUnfolder]: 115727/143552 cut-off events. [2023-08-30 00:22:23,844 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:22:24,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286049 conditions, 143552 events. 115727/143552 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9112. Compared 840621 event pairs, 77118 based on Foata normal form. 0/38146 useless extension candidates. Maximal degree in co-relation 286040. Up to 47090 conditions per place. [2023-08-30 00:22:24,626 INFO L137 encePairwiseOnDemand]: 555/567 looper letters, 173 selfloop transitions, 27 changer transitions 0/206 dead transitions. [2023-08-30 00:22:24,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 206 transitions, 919 flow [2023-08-30 00:22:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:22:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:22:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1469 transitions. [2023-08-30 00:22:24,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43180482069370957 [2023-08-30 00:22:24,631 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1469 transitions. [2023-08-30 00:22:24,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1469 transitions. [2023-08-30 00:22:24,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:24,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1469 transitions. [2023-08-30 00:22:24,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:24,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:24,642 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:24,642 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 199 flow. Second operand 6 states and 1469 transitions. [2023-08-30 00:22:24,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 206 transitions, 919 flow [2023-08-30 00:22:24,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 206 transitions, 895 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:22:24,647 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 391 flow [2023-08-30 00:22:24,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2023-08-30 00:22:24,647 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -2 predicate places. [2023-08-30 00:22:24,648 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 391 flow [2023-08-30 00:22:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:24,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:24,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:22:24,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:24,857 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 00:22:24,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:22:24,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash 41833433, now seen corresponding path program 1 times [2023-08-30 00:22:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:24,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298652009] [2023-08-30 00:22:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:24,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:24,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:24,859 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 00:22:24,861 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 (5)] Waiting until timeout for monitored process [2023-08-30 00:22:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:22:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:25,119 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 00:22:25,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 00:22:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:26,068 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 00:22:26,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 00:22:27,351 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 00:22:27,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-08-30 00:23:17,275 WARN L222 SmtUtils]: Spent 20.59s on a formula simplification. DAG size of input: 253 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:23:17,277 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 00:23:17,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:17,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298652009] [2023-08-30 00:23:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298652009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:17,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:17,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:23:17,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255871839] [2023-08-30 00:23:17,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:17,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:23:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:23:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 00:23:22,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:23:24,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:23:26,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 567 [2023-08-30 00:23:26,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:26,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:26,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 567 [2023-08-30 00:23:26,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:36,924 INFO L130 PetriNetUnfolder]: 92445/115467 cut-off events. [2023-08-30 00:23:36,924 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 00:23:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229941 conditions, 115467 events. 92445/115467 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7470. Compared 680025 event pairs, 61038 based on Foata normal form. 0/31619 useless extension candidates. Maximal degree in co-relation 229928. Up to 113187 conditions per place. [2023-08-30 00:23:37,663 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 85 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-08-30 00:23:37,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 92 transitions, 543 flow [2023-08-30 00:23:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-08-30 00:23:37,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38330393885949443 [2023-08-30 00:23:37,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-08-30 00:23:37,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-08-30 00:23:37,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:37,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-08-30 00:23:37,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:37,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:37,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:37,673 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 391 flow. Second operand 3 states and 652 transitions. [2023-08-30 00:23:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 92 transitions, 543 flow [2023-08-30 00:23:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 92 transitions, 513 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:37,676 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 343 flow [2023-08-30 00:23:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-08-30 00:23:37,677 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-08-30 00:23:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 343 flow [2023-08-30 00:23:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:37,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 00:23:37,686 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 00:23:37,884 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 00:23:37,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:37,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 41833435, now seen corresponding path program 1 times [2023-08-30 00:23:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102545493] [2023-08-30 00:23:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:37,885 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 00:23:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:37,887 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 00:23:37,887 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 00:23:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:23:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,191 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 00:23:38,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 00:23:38,233 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 00:23:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 00:23:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:23:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:38,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:23:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:23:38,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:23:38,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:23:38,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102545493] [2023-08-30 00:23:38,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102545493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:23:38,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:23:38,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:23:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428489524] [2023-08-30 00:23:38,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:23:38,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:23:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:23:38,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:23:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:23:38,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-08-30 00:23:38,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:38,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:23:38,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-08-30 00:23:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:23:45,988 INFO L130 PetriNetUnfolder]: 69163/87382 cut-off events. [2023-08-30 00:23:45,988 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:23:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173745 conditions, 87382 events. 69163/87382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5321. Compared 517215 event pairs, 44958 based on Foata normal form. 0/27059 useless extension candidates. Maximal degree in co-relation 173731. Up to 85102 conditions per place. [2023-08-30 00:23:46,716 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 81 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-30 00:23:46,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 487 flow [2023-08-30 00:23:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:23:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:23:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 00:23:46,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44738389182833627 [2023-08-30 00:23:46,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 00:23:46,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 00:23:46,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:23:46,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 00:23:46,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:46,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:46,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:46,725 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 343 flow. Second operand 3 states and 761 transitions. [2023-08-30 00:23:46,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 487 flow [2023-08-30 00:23:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:23:46,728 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 324 flow [2023-08-30 00:23:46,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-08-30 00:23:46,728 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -4 predicate places. [2023-08-30 00:23:46,729 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 324 flow [2023-08-30 00:23:46,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:23:46,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:23:46,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:23:46,740 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 00:23:46,939 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 00:23:46,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:23:46,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:23:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257830, now seen corresponding path program 1 times [2023-08-30 00:23:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:23:46,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522989802] [2023-08-30 00:23:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:23:46,940 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 00:23:46,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:23:46,941 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 00:23:46,942 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 00:23:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:23:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:23:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:23:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:47,151 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 00:23:47,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 00:23:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:23:48,192 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2023-08-30 00:23:48,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 00:23:48,872 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 00:23:48,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 174 [2023-08-30 00:24:46,475 WARN L222 SmtUtils]: Spent 28.12s on a formula simplification. DAG size of input: 395 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:24:46,786 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 00:24:46,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:46,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522989802] [2023-08-30 00:24:46,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522989802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:46,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:46,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:24:46,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999534740] [2023-08-30 00:24:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:24:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:24:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 00:24:49,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 567 [2023-08-30 00:24:49,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:49,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:49,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 567 [2023-08-30 00:24:49,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:56,547 INFO L130 PetriNetUnfolder]: 67192/84787 cut-off events. [2023-08-30 00:24:56,547 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:24:56,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168556 conditions, 84787 events. 67192/84787 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5177. Compared 498563 event pairs, 43455 based on Foata normal form. 0/26588 useless extension candidates. Maximal degree in co-relation 168541. Up to 82507 conditions per place. [2023-08-30 00:24:57,016 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 00:24:57,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 480 flow [2023-08-30 00:24:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:24:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:24:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-30 00:24:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-08-30 00:24:57,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-30 00:24:57,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-30 00:24:57,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:57,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-30 00:24:57,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,024 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 324 flow. Second operand 3 states and 648 transitions. [2023-08-30 00:24:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 480 flow [2023-08-30 00:24:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:24:57,026 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 321 flow [2023-08-30 00:24:57,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2023-08-30 00:24:57,027 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -5 predicate places. [2023-08-30 00:24:57,027 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 321 flow [2023-08-30 00:24:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:57,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:24:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:24:57,044 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 00:24:57,238 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 00:24:57,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:24:57,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:24:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257831, now seen corresponding path program 1 times [2023-08-30 00:24:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:24:57,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897208407] [2023-08-30 00:24:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:24:57,239 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 00:24:57,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:24:57,241 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 00:24:57,242 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 00:24:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:24:57,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:24:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:24:57,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,504 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-08-30 00:24:57,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-08-30 00:24:57,543 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 00:24:57,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 81 [2023-08-30 00:24:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:24:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:24:57,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:24:57,726 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 00:24:57,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:24:57,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:24:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897208407] [2023-08-30 00:24:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897208407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:24:57,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:24:57,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:24:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171329608] [2023-08-30 00:24:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:24:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:24:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:24:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:24:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:24:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-08-30 00:24:58,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:58,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:24:58,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-08-30 00:24:58,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:05,145 INFO L130 PetriNetUnfolder]: 65221/82192 cut-off events. [2023-08-30 00:25:05,146 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 00:25:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163367 conditions, 82192 events. 65221/82192 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5033. Compared 480110 event pairs, 41952 based on Foata normal form. 0/26117 useless extension candidates. Maximal degree in co-relation 163351. Up to 79912 conditions per place. [2023-08-30 00:25:05,614 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 00:25:05,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 473 flow [2023-08-30 00:25:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:25:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:25:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-08-30 00:25:05,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450323339212228 [2023-08-30 00:25:05,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-08-30 00:25:05,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-08-30 00:25:05,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:25:05,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-08-30 00:25:05,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,622 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 321 flow. Second operand 3 states and 757 transitions. [2023-08-30 00:25:05,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 473 flow [2023-08-30 00:25:05,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:25:05,624 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 318 flow [2023-08-30 00:25:05,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2023-08-30 00:25:05,625 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-08-30 00:25:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 318 flow [2023-08-30 00:25:05,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:05,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:25:05,626 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:25:05,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:25:05,833 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 00:25:05,833 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:25:05,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:25:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1493861311, now seen corresponding path program 2 times [2023-08-30 00:25:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:25:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924930256] [2023-08-30 00:25:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:25:05,834 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 00:25:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:25:05,837 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 00:25:05,838 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 00:25:05,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:25:05,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:25:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:25:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:25:06,086 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:25:06,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:25:06,236 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 00:25:06,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:25:06,889 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 00:25:06,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:25:06,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924930256] [2023-08-30 00:25:06,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924930256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:25:06,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:25:06,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:25:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211785661] [2023-08-30 00:25:06,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:25:06,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:25:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:25:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:25:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:25:12,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 567 [2023-08-30 00:25:12,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:25:12,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:25:12,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 567 [2023-08-30 00:25:12,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:25:15,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:17,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:19,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:21,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:23,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:25,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:27,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:29,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:32,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:35,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:25:38,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:26:07,744 INFO L130 PetriNetUnfolder]: 217384/273930 cut-off events. [2023-08-30 00:26:07,744 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 00:26:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544347 conditions, 273930 events. 217384/273930 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 10412. Compared 1728283 event pairs, 139840 based on Foata normal form. 18/90102 useless extension candidates. Maximal degree in co-relation 544330. Up to 26650 conditions per place. [2023-08-30 00:26:09,696 INFO L137 encePairwiseOnDemand]: 557/567 looper letters, 478 selfloop transitions, 52 changer transitions 0/536 dead transitions. [2023-08-30 00:26:09,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 536 transitions, 2506 flow [2023-08-30 00:26:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:26:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:26:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3104 transitions. [2023-08-30 00:26:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45620223398001175 [2023-08-30 00:26:09,704 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3104 transitions. [2023-08-30 00:26:09,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3104 transitions. [2023-08-30 00:26:09,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:26:09,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3104 transitions. [2023-08-30 00:26:09,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.6666666666667) internal successors, (3104), 12 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:09,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:09,721 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:09,722 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 318 flow. Second operand 12 states and 3104 transitions. [2023-08-30 00:26:09,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 536 transitions, 2506 flow [2023-08-30 00:26:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 536 transitions, 2505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:26:09,728 INFO L231 Difference]: Finished difference. Result has 93 places, 115 transitions, 707 flow [2023-08-30 00:26:09,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=707, PETRI_PLACES=93, PETRI_TRANSITIONS=115} [2023-08-30 00:26:09,729 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2023-08-30 00:26:09,729 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 115 transitions, 707 flow [2023-08-30 00:26:09,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:09,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:26:09,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:26:09,738 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 00:26:09,931 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 00:26:09,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 00:26:09,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:26:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 720344793, now seen corresponding path program 1 times [2023-08-30 00:26:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:26:09,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919271422] [2023-08-30 00:26:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:26:09,938 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 00:26:09,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:26:09,940 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 00:26:09,942 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 00:26:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:26:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:26:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:26:10,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:26:10,190 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 00:26:10,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:26:10,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:26:10,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919271422] [2023-08-30 00:26:10,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919271422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:26:10,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:26:10,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:26:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445140086] [2023-08-30 00:26:10,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:26:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:26:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:26:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:26:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:26:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 567 [2023-08-30 00:26:10,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 115 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:26:10,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:26:10,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 567 [2023-08-30 00:26:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand