./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:28:05,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:28:05,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:28:05,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:28:05,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:28:05,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:28:05,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:28:05,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:28:05,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:28:05,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:28:05,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:28:05,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:28:05,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:28:05,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:28:05,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:28:05,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:28:05,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:28:05,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:28:05,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:28:05,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:28:05,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:28:05,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:28:05,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:28:05,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:28:05,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:28:05,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:28:05,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:28:05,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:28:05,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:28:05,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:28:05,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:28:05,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:28:05,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:28:05,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:28:05,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:28:05,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:28:05,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:28:05,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:28:05,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:28:05,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:28:05,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:28:05,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:28:05,918 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:28:05,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:28:05,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:28:05,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:28:05,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:28:05,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:28:05,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:28:05,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:28:05,921 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:28:05,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:28:05,921 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:28:05,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:28:05,923 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:28:05,923 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:28:05,923 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:28:05,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:28:05,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:28:05,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:05,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:28:05,924 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:28:05,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:28:05,925 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:28:05,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:28:06,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:28:06,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:28:06,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:28:06,206 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:28:06,206 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:28:06,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 01:28:07,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:28:07,414 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:28:07,414 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 01:28:07,420 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bc7c5125/078bd38d7abd41d4be85a325b057e1d5/FLAG93bd8e503 [2023-09-01 01:28:07,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bc7c5125/078bd38d7abd41d4be85a325b057e1d5 [2023-09-01 01:28:07,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:28:07,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:28:07,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:07,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:28:07,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:28:07,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:07" (1/1) ... [2023-09-01 01:28:07,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d5b6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:07, skipping insertion in model container [2023-09-01 01:28:07,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:07" (1/1) ... [2023-09-01 01:28:07,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:28:07,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:07,610 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 01:28:07,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:07,629 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) [2023-09-01 01:28:07,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b01d27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:07, skipping insertion in model container [2023-09-01 01:28:07,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:07,631 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:28:07,632 INFO L158 Benchmark]: Toolchain (without parser) took 191.23ms. Allocated memory is still 60.8MB. Free memory was 38.6MB in the beginning and 28.7MB in the end (delta: 9.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 01:28:07,633 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 48.2MB. Free memory was 26.4MB in the beginning and 26.3MB in the end (delta: 31.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:28:07,634 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.77ms. Allocated memory is still 60.8MB. Free memory was 38.4MB in the beginning and 28.7MB in the end (delta: 9.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 01:28:07,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 48.2MB. Free memory was 26.4MB in the beginning and 26.3MB in the end (delta: 31.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.77ms. Allocated memory is still 60.8MB. Free memory was 38.4MB in the beginning and 28.7MB in the end (delta: 9.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 117]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:28:09,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:28:09,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:28:09,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:28:09,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:28:09,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:28:09,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:28:09,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:28:09,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:28:09,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:28:09,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:28:09,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:28:09,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:28:09,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:28:09,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:28:09,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:28:09,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:28:09,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:28:09,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:28:09,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:28:09,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:28:09,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:28:09,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:28:09,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:28:09,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:28:09,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:28:09,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:28:09,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:28:09,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:28:09,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:28:09,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:28:09,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:28:09,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:28:09,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:28:09,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:28:09,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:28:09,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:28:09,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:28:09,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:28:09,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:28:09,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:28:09,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:28:09,245 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:28:09,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:28:09,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:28:09,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:28:09,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:28:09,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:28:09,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:28:09,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:28:09,251 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:28:09,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:28:09,252 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:28:09,252 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:28:09,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:28:09,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:28:09,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:28:09,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:28:09,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:28:09,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:28:09,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:28:09,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:28:09,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:28:09,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:28:09,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:09,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:28:09,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:28:09,255 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:28:09,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:28:09,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:28:09,256 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:28:09,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:28:09,256 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:28:09,257 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:28:09,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:28:09,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:28:09,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:28:09,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:28:09,504 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:28:09,505 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:28:09,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 01:28:10,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:28:10,659 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:28:10,660 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 01:28:10,681 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1a305b8/18a2f9e1995b4bf2a6b6bbe4cb9ceac6/FLAG395325827 [2023-09-01 01:28:10,697 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1a305b8/18a2f9e1995b4bf2a6b6bbe4cb9ceac6 [2023-09-01 01:28:10,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:28:10,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:28:10,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:10,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:28:10,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:28:10,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:10,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b03c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10, skipping insertion in model container [2023-09-01 01:28:10,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:10,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:28:10,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:10,867 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 01:28:10,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:10,881 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:28:10,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:28:10,893 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 01:28:10,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:10,921 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:28:10,953 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 01:28:10,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:28:10,971 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:28:10,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10 WrapperNode [2023-09-01 01:28:10,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:28:10,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:28:10,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:28:10,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:28:10,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:10,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,029 INFO L138 Inliner]: procedures = 28, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 274 [2023-09-01 01:28:11,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:28:11,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:28:11,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:28:11,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:28:11,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:28:11,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:28:11,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:28:11,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:28:11,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (1/1) ... [2023-09-01 01:28:11,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:28:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:28:11,143 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) [2023-09-01 01:28:11,156 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 [2023-09-01 01:28:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:28:11,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:28:11,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:28:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:28:11,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:28:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:28:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:28:11,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:28:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:28:11,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:28:11,179 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:28:11,309 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:28:11,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:28:11,872 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:28:11,884 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:28:11,885 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:28:11,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:28:11 BoogieIcfgContainer [2023-09-01 01:28:11,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:28:11,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:28:11,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:28:11,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:28:11,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:28:10" (1/3) ... [2023-09-01 01:28:11,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ed6236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:28:11, skipping insertion in model container [2023-09-01 01:28:11,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:28:10" (2/3) ... [2023-09-01 01:28:11,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ed6236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:28:11, skipping insertion in model container [2023-09-01 01:28:11,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:28:11" (3/3) ... [2023-09-01 01:28:11,893 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-09-01 01:28:11,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:28:11,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 01:28:11,904 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:28:12,049 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:28:12,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 355 transitions, 734 flow [2023-09-01 01:28:12,223 INFO L130 PetriNetUnfolder]: 28/352 cut-off events. [2023-09-01 01:28:12,223 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:28:12,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 352 events. 28/352 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 772 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-09-01 01:28:12,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 355 transitions, 734 flow [2023-09-01 01:28:12,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 348 transitions, 714 flow [2023-09-01 01:28:12,242 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:28:12,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 348 transitions, 714 flow [2023-09-01 01:28:12,253 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 348 transitions, 714 flow [2023-09-01 01:28:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 348 transitions, 714 flow [2023-09-01 01:28:12,300 INFO L130 PetriNetUnfolder]: 28/348 cut-off events. [2023-09-01 01:28:12,300 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:28:12,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 348 events. 28/348 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 770 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-09-01 01:28:12,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 21114 [2023-09-01 01:28:40,253 INFO L134 LiptonReduction]: Checked pairs total: 32594 [2023-09-01 01:28:40,253 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-09-01 01:28:40,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:28:40,284 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;@63d4e5da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:28:40,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-09-01 01:28:40,288 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:28:40,288 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:28:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:28:40,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:28:40,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:40,293 INFO L85 PathProgramCache]: Analyzing trace with hash 45647, now seen corresponding path program 1 times [2023-09-01 01:28:40,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229408693] [2023-09-01 01:28:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:40,302 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 [2023-09-01 01:28:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:40,313 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) [2023-09-01 01:28:40,334 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 [2023-09-01 01:28:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:28:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:40,533 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:28:40,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 01:28:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:40,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:40,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:40,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229408693] [2023-09-01 01:28:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229408693] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:40,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:40,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149656547] [2023-09-01 01:28:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:40,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:40,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-09-01 01:28:40,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:40,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:40,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-09-01 01:28:40,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:42,962 INFO L130 PetriNetUnfolder]: 17182/23633 cut-off events. [2023-09-01 01:28:42,963 INFO L131 PetriNetUnfolder]: For 452/452 co-relation queries the response was YES. [2023-09-01 01:28:42,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 23633 events. 17182/23633 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 133802 event pairs, 14603 based on Foata normal form. 0/7805 useless extension candidates. Maximal degree in co-relation 45108. Up to 23465 conditions per place. [2023-09-01 01:28:43,061 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 69 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 01:28:43,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 300 flow [2023-09-01 01:28:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-09-01 01:28:43,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-09-01 01:28:43,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-09-01 01:28:43,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-09-01 01:28:43,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:43,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-09-01 01:28:43,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:43,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:43,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:43,094 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1020 transitions. [2023-09-01 01:28:43,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 300 flow [2023-09-01 01:28:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:28:43,100 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 150 flow [2023-09-01 01:28:43,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-09-01 01:28:43,103 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-09-01 01:28:43,103 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 150 flow [2023-09-01 01:28:43,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:43,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:28:43,125 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 [2023-09-01 01:28:43,311 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 [2023-09-01 01:28:43,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:28:43,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash 45648, now seen corresponding path program 1 times [2023-09-01 01:28:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:43,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083344943] [2023-09-01 01:28:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:43,312 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 [2023-09-01 01:28:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:43,313 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) [2023-09-01 01:28:43,315 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 [2023-09-01 01:28:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:28:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:43,464 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:28:43,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:28:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:43,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:28:43,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083344943] [2023-09-01 01:28:43,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083344943] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:28:43,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:28:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:28:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285939956] [2023-09-01 01:28:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:28:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:28:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:28:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:28:43,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-09-01 01:28:43,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:43,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:43,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-09-01 01:28:43,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:47,474 INFO L130 PetriNetUnfolder]: 34363/47262 cut-off events. [2023-09-01 01:28:47,475 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-09-01 01:28:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 47262 events. 34363/47262 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 2801. Compared 291677 event pairs, 29206 based on Foata normal form. 0/15889 useless extension candidates. Maximal degree in co-relation 94580. Up to 23466 conditions per place. [2023-09-01 01:28:47,645 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-09-01 01:28:47,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 560 flow [2023-09-01 01:28:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:28:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:28:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-09-01 01:28:47,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467965367965368 [2023-09-01 01:28:47,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-09-01 01:28:47,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-09-01 01:28:47,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:47,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-09-01 01:28:47,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:47,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:47,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:47,656 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 150 flow. Second operand 3 states and 1081 transitions. [2023-09-01 01:28:47,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 560 flow [2023-09-01 01:28:47,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:28:47,659 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 199 flow [2023-09-01 01:28:47,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-09-01 01:28:47,661 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-09-01 01:28:47,661 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 199 flow [2023-09-01 01:28:47,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:47,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:47,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:28:47,669 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 [2023-09-01 01:28:47,869 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 [2023-09-01 01:28:47,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:28:47,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1419537, now seen corresponding path program 1 times [2023-09-01 01:28:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176929453] [2023-09-01 01:28:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:47,871 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 [2023-09-01 01:28:47,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:47,872 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) [2023-09-01 01:28:47,873 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 [2023-09-01 01:28:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:28:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:48,030 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:28:48,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:28:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:48,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:28:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:28:48,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:28:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176929453] [2023-09-01 01:28:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176929453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:28:48,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:28:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:28:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102045795] [2023-09-01 01:28:48,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:28:48,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:28:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:28:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:28:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:28:49,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 770 [2023-09-01 01:28:49,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:49,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:28:49,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 770 [2023-09-01 01:28:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:28:57,058 INFO L130 PetriNetUnfolder]: 51554/70907 cut-off events. [2023-09-01 01:28:57,059 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2023-09-01 01:28:57,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141947 conditions, 70907 events. 51554/70907 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 3744. Compared 456867 event pairs, 43809 based on Foata normal form. 0/23994 useless extension candidates. Maximal degree in co-relation 141938. Up to 23467 conditions per place. [2023-09-01 01:28:57,316 INFO L137 encePairwiseOnDemand]: 758/770 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2023-09-01 01:28:57,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 219 transitions, 975 flow [2023-09-01 01:28:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:28:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:28:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2021 transitions. [2023-09-01 01:28:57,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43744588744588747 [2023-09-01 01:28:57,321 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2021 transitions. [2023-09-01 01:28:57,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2021 transitions. [2023-09-01 01:28:57,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:28:57,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2021 transitions. [2023-09-01 01:28:57,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 336.8333333333333) internal successors, (2021), 6 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:57,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:57,332 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:57,332 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 199 flow. Second operand 6 states and 2021 transitions. [2023-09-01 01:28:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 219 transitions, 975 flow [2023-09-01 01:28:57,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:28:57,336 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2023-09-01 01:28:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-09-01 01:28:57,337 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-09-01 01:28:57,337 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2023-09-01 01:28:57,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:28:57,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:28:57,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:28:57,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 01:28:57,556 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 [2023-09-01 01:28:57,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:28:57,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:28:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 44050835, now seen corresponding path program 1 times [2023-09-01 01:28:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:28:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579493832] [2023-09-01 01:28:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:28:57,560 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 [2023-09-01 01:28:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:28:57,561 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) [2023-09-01 01:28:57,563 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 [2023-09-01 01:28:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:28:57,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:28:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:28:57,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:57,739 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:28:57,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 01:28:57,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:28:57,980 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 01:28:57,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 01:28:58,213 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 01:28:58,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 01:29:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:29:00,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:00,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579493832] [2023-09-01 01:29:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579493832] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:00,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:00,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:29:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876891917] [2023-09-01 01:29:00,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:29:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:29:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 01:29:02,655 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] [2023-09-01 01:29:05,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:07,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:09,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:11,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:13,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:15,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:17,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:19,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:21,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:23,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:25,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:27,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:29:30,413 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] [2023-09-01 01:29:30,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 770 [2023-09-01 01:29:30,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:30,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:30,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 770 [2023-09-01 01:29:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:35,067 INFO L130 PetriNetUnfolder]: 42450/58608 cut-off events. [2023-09-01 01:29:35,067 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2023-09-01 01:29:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117957 conditions, 58608 events. 42450/58608 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 371371 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 117944. Up to 58608 conditions per place. [2023-09-01 01:29:35,412 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 92 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-09-01 01:29:35,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 557 flow [2023-09-01 01:29:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:29:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:29:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-09-01 01:29:35,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2023-09-01 01:29:35,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-09-01 01:29:35,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-09-01 01:29:35,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:35,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-09-01 01:29:35,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:35,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:35,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:35,425 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 869 transitions. [2023-09-01 01:29:35,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 557 flow [2023-09-01 01:29:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 527 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:29:35,428 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2023-09-01 01:29:35,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-09-01 01:29:35,428 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-09-01 01:29:35,428 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2023-09-01 01:29:35,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:35,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:35,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:29:35,445 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 [2023-09-01 01:29:35,636 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 [2023-09-01 01:29:35,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:29:35,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash 44050836, now seen corresponding path program 1 times [2023-09-01 01:29:35,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178973540] [2023-09-01 01:29:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:29:35,639 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 [2023-09-01 01:29:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:35,640 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) [2023-09-01 01:29:35,644 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 [2023-09-01 01:29:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:29:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:29:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,822 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 01:29:35,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 01:29:35,837 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 01:29:35,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 01:29:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,868 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 [2023-09-01 01:29:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:29:35,890 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 [2023-09-01 01:29:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:29:35,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:29:35,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178973540] [2023-09-01 01:29:35,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178973540] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:29:35,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:29:35,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:29:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284156476] [2023-09-01 01:29:35,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:29:35,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:29:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:29:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:29:36,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-09-01 01:29:36,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:36,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:36,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-09-01 01:29:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:39,429 INFO L130 PetriNetUnfolder]: 27484/39019 cut-off events. [2023-09-01 01:29:39,430 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-09-01 01:29:39,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78375 conditions, 39019 events. 27484/39019 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 249941 event pairs, 23103 based on Foata normal form. 0/15833 useless extension candidates. Maximal degree in co-relation 78361. Up to 38683 conditions per place. [2023-09-01 01:29:39,571 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-09-01 01:29:39,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 499 flow [2023-09-01 01:29:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:29:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:29:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-09-01 01:29:39,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44632034632034634 [2023-09-01 01:29:39,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-09-01 01:29:39,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-09-01 01:29:39,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:29:39,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-09-01 01:29:39,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:39,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:39,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:39,581 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 1031 transitions. [2023-09-01 01:29:39,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 499 flow [2023-09-01 01:29:39,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:29:39,583 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2023-09-01 01:29:39,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2023-09-01 01:29:39,583 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-09-01 01:29:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2023-09-01 01:29:39,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:39,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:29:39,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:29:39,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-09-01 01:29:39,793 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 [2023-09-01 01:29:39,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:29:39,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:29:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -655828336, now seen corresponding path program 2 times [2023-09-01 01:29:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:29:39,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476193839] [2023-09-01 01:29:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:29:39,794 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 [2023-09-01 01:29:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:29:39,796 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) [2023-09-01 01:29:39,797 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 [2023-09-01 01:29:39,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:29:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:29:39,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:29:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:29:39,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 01:29:39,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 01:29:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:29:40,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:29:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:29:40,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:29:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476193839] [2023-09-01 01:29:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476193839] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:29:40,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:29:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:29:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223898100] [2023-09-01 01:29:40,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:29:40,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:29:40,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:29:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:29:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:29:45,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 770 [2023-09-01 01:29:45,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:29:45,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:29:45,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 770 [2023-09-01 01:29:45,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:29:48,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:29:50,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:29:52,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:29:55,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:29:57,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:29:58,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:30:00,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:30:01,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:30:03,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:30:18,969 INFO L130 PetriNetUnfolder]: 82436/117021 cut-off events. [2023-09-01 01:30:18,970 INFO L131 PetriNetUnfolder]: For 807/807 co-relation queries the response was YES. [2023-09-01 01:30:19,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234954 conditions, 117021 events. 82436/117021 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 4105. Compared 822994 event pairs, 69309 based on Foata normal form. 16/48592 useless extension candidates. Maximal degree in co-relation 234939. Up to 12906 conditions per place. [2023-09-01 01:30:19,463 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 521 selfloop transitions, 49 changer transitions 0/571 dead transitions. [2023-09-01 01:30:19,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 571 transitions, 2612 flow [2023-09-01 01:30:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:30:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:30:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4210 transitions. [2023-09-01 01:30:19,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556277056277056 [2023-09-01 01:30:19,483 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4210 transitions. [2023-09-01 01:30:19,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4210 transitions. [2023-09-01 01:30:19,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:19,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4210 transitions. [2023-09-01 01:30:19,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 350.8333333333333) internal successors, (4210), 12 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:19,501 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:19,501 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 12 states and 4210 transitions. [2023-09-01 01:30:19,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 571 transitions, 2612 flow [2023-09-01 01:30:19,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 571 transitions, 2611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:30:19,507 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 680 flow [2023-09-01 01:30:19,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=680, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2023-09-01 01:30:19,508 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-09-01 01:30:19,508 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 680 flow [2023-09-01 01:30:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:19,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:19,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:30:19,519 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 [2023-09-01 01:30:19,716 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 [2023-09-01 01:30:19,718 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:30:19,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -616786858, now seen corresponding path program 1 times [2023-09-01 01:30:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620336322] [2023-09-01 01:30:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:19,719 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 [2023-09-01 01:30:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:19,720 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) [2023-09-01 01:30:19,722 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 [2023-09-01 01:30:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:30:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:19,852 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:30:19,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 01:30:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:19,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:30:19,955 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:30:19,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:30:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:19,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:19,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620336322] [2023-09-01 01:30:19,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620336322] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:19,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:19,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:30:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449237880] [2023-09-01 01:30:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:30:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:30:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:30:20,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-09-01 01:30:20,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 680 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:20,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:20,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-09-01 01:30:20,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:29,850 INFO L130 PetriNetUnfolder]: 80600/114240 cut-off events. [2023-09-01 01:30:29,850 INFO L131 PetriNetUnfolder]: For 833/833 co-relation queries the response was YES. [2023-09-01 01:30:30,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229502 conditions, 114240 events. 80600/114240 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 3598. Compared 797154 event pairs, 67734 based on Foata normal form. 0/46873 useless extension candidates. Maximal degree in co-relation 229479. Up to 113232 conditions per place. [2023-09-01 01:30:30,535 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 113 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-09-01 01:30:30,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 904 flow [2023-09-01 01:30:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:30:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:30:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1029 transitions. [2023-09-01 01:30:30,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2023-09-01 01:30:30,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1029 transitions. [2023-09-01 01:30:30,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1029 transitions. [2023-09-01 01:30:30,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:30,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1029 transitions. [2023-09-01 01:30:30,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:30,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:30,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:30,545 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 680 flow. Second operand 3 states and 1029 transitions. [2023-09-01 01:30:30,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 904 flow [2023-09-01 01:30:30,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 812 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 01:30:30,549 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 586 flow [2023-09-01 01:30:30,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=586, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2023-09-01 01:30:30,549 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-09-01 01:30:30,550 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 586 flow [2023-09-01 01:30:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:30,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:30,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:30:30,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-09-01 01:30:30,757 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 [2023-09-01 01:30:30,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:30:30,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash -616786859, now seen corresponding path program 1 times [2023-09-01 01:30:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185789847] [2023-09-01 01:30:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:30,758 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 [2023-09-01 01:30:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:30,759 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) [2023-09-01 01:30:30,761 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 [2023-09-01 01:30:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:30:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:30,926 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:30:30,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 01:30:30,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-09-01 01:30:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:30,989 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 [2023-09-01 01:30:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:30:31,013 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 [2023-09-01 01:30:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:31,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:31,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185789847] [2023-09-01 01:30:31,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185789847] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:31,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:31,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:30:31,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376773200] [2023-09-01 01:30:31,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:30:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:31,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:30:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:30:31,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-09-01 01:30:31,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 586 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:31,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:31,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-09-01 01:30:31,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:40,938 INFO L130 PetriNetUnfolder]: 78764/111459 cut-off events. [2023-09-01 01:30:40,939 INFO L131 PetriNetUnfolder]: For 856/856 co-relation queries the response was YES. [2023-09-01 01:30:41,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223885 conditions, 111459 events. 78764/111459 cut-off events. For 856/856 co-relation queries the response was YES. Maximal size of possible extension queue 3763. Compared 776590 event pairs, 66159 based on Foata normal form. 0/46281 useless extension candidates. Maximal degree in co-relation 223861. Up to 110451 conditions per place. [2023-09-01 01:30:41,543 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 111 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-09-01 01:30:41,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 806 flow [2023-09-01 01:30:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:30:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:30:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-09-01 01:30:41,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445887445887446 [2023-09-01 01:30:41,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-09-01 01:30:41,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-09-01 01:30:41,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:41,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-09-01 01:30:41,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:41,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:41,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:41,549 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 586 flow. Second operand 3 states and 1027 transitions. [2023-09-01 01:30:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 806 flow [2023-09-01 01:30:41,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 805 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:30:41,552 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 583 flow [2023-09-01 01:30:41,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=583, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2023-09-01 01:30:41,553 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 8 predicate places. [2023-09-01 01:30:41,553 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 583 flow [2023-09-01 01:30:41,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:41,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:41,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:30:41,562 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 [2023-09-01 01:30:41,761 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 [2023-09-01 01:30:41,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:30:41,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1940525924, now seen corresponding path program 1 times [2023-09-01 01:30:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497066693] [2023-09-01 01:30:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:41,762 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 [2023-09-01 01:30:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:41,763 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) [2023-09-01 01:30:41,765 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 [2023-09-01 01:30:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:30:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:41,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:41,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497066693] [2023-09-01 01:30:41,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497066693] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:41,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:41,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:30:41,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209460117] [2023-09-01 01:30:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:41,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:30:41,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:30:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:30:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-09-01 01:30:42,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:42,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:42,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-09-01 01:30:42,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:53,918 INFO L130 PetriNetUnfolder]: 95947/137025 cut-off events. [2023-09-01 01:30:53,918 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2023-09-01 01:30:54,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275448 conditions, 137025 events. 95947/137025 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 4595. Compared 1002759 event pairs, 68697 based on Foata normal form. 0/61821 useless extension candidates. Maximal degree in co-relation 275423. Up to 110450 conditions per place. [2023-09-01 01:30:54,781 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 211 selfloop transitions, 4 changer transitions 0/216 dead transitions. [2023-09-01 01:30:54,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 216 transitions, 1436 flow [2023-09-01 01:30:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:30:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:30:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1702 transitions. [2023-09-01 01:30:54,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44207792207792207 [2023-09-01 01:30:54,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1702 transitions. [2023-09-01 01:30:54,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1702 transitions. [2023-09-01 01:30:54,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:54,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1702 transitions. [2023-09-01 01:30:54,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:54,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:54,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:54,800 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 583 flow. Second operand 5 states and 1702 transitions. [2023-09-01 01:30:54,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 216 transitions, 1436 flow [2023-09-01 01:30:54,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 216 transitions, 1435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:30:54,811 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 607 flow [2023-09-01 01:30:54,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=607, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-09-01 01:30:54,812 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-09-01 01:30:54,813 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 607 flow [2023-09-01 01:30:54,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:54,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:54,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:30:54,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:30:55,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:30:55,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1975384452, now seen corresponding path program 1 times [2023-09-01 01:30:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:55,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381616094] [2023-09-01 01:30:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:55,020 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 [2023-09-01 01:30:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:55,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:30:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:30:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:55,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:30:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:30:55,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:55,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381616094] [2023-09-01 01:30:55,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381616094] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:55,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:55,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:30:55,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134622832] [2023-09-01 01:30:55,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:30:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:30:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:30:55,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-09-01 01:30:55,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:55,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:55,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-09-01 01:30:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:11,630 INFO L130 PetriNetUnfolder]: 130293/188043 cut-off events. [2023-09-01 01:31:11,630 INFO L131 PetriNetUnfolder]: For 20778/20778 co-relation queries the response was YES. [2023-09-01 01:31:12,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401665 conditions, 188043 events. 130293/188043 cut-off events. For 20778/20778 co-relation queries the response was YES. Maximal size of possible extension queue 6141. Compared 1461020 event pairs, 86211 based on Foata normal form. 2124/94605 useless extension candidates. Maximal degree in co-relation 401637. Up to 135933 conditions per place. [2023-09-01 01:31:12,811 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 181 selfloop transitions, 15 changer transitions 0/197 dead transitions. [2023-09-01 01:31:12,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 197 transitions, 1268 flow [2023-09-01 01:31:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:31:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:31:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1699 transitions. [2023-09-01 01:31:12,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412987012987013 [2023-09-01 01:31:12,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1699 transitions. [2023-09-01 01:31:12,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1699 transitions. [2023-09-01 01:31:12,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:12,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1699 transitions. [2023-09-01 01:31:12,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.8) internal successors, (1699), 5 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,820 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 607 flow. Second operand 5 states and 1699 transitions. [2023-09-01 01:31:12,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 197 transitions, 1268 flow [2023-09-01 01:31:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 197 transitions, 1262 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:12,914 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 660 flow [2023-09-01 01:31:12,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=660, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2023-09-01 01:31:12,915 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2023-09-01 01:31:12,915 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 660 flow [2023-09-01 01:31:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:12,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:12,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-09-01 01:31:13,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:13,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:31:13,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -26653916, now seen corresponding path program 1 times [2023-09-01 01:31:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:13,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145168089] [2023-09-01 01:31:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:13,123 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 [2023-09-01 01:31:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:13,124 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:31:13,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 01:31:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:31:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:13,322 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:13,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 01:31:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 01:31:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:13,355 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 [2023-09-01 01:31:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:13,388 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 [2023-09-01 01:31:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:13,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:13,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145168089] [2023-09-01 01:31:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145168089] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:13,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:13,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:13,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138349748] [2023-09-01 01:31:13,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:13,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:13,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:13,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 770 [2023-09-01 01:31:13,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 660 flow. Second operand has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:13,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:13,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 770 [2023-09-01 01:31:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:29,767 INFO L130 PetriNetUnfolder]: 124686/179412 cut-off events. [2023-09-01 01:31:29,768 INFO L131 PetriNetUnfolder]: For 59197/59197 co-relation queries the response was YES. [2023-09-01 01:31:30,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405288 conditions, 179412 events. 124686/179412 cut-off events. For 59197/59197 co-relation queries the response was YES. Maximal size of possible extension queue 5868. Compared 1360960 event pairs, 106164 based on Foata normal form. 0/88350 useless extension candidates. Maximal degree in co-relation 405258. Up to 178341 conditions per place. [2023-09-01 01:31:30,951 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 112 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-09-01 01:31:30,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 114 transitions, 882 flow [2023-09-01 01:31:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-09-01 01:31:30,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44112554112554114 [2023-09-01 01:31:30,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-09-01 01:31:30,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-09-01 01:31:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:30,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-09-01 01:31:30,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,958 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 660 flow. Second operand 3 states and 1019 transitions. [2023-09-01 01:31:30,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 114 transitions, 882 flow [2023-09-01 01:31:31,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 114 transitions, 866 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:31,079 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 642 flow [2023-09-01 01:31:31,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=642, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2023-09-01 01:31:31,080 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2023-09-01 01:31:31,080 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 642 flow [2023-09-01 01:31:31,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:31,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:31,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:31,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:31,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-09-01 01:31:31,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -26653915, now seen corresponding path program 1 times [2023-09-01 01:31:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743699777] [2023-09-01 01:31:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:31,288 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 [2023-09-01 01:31:31,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:31,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:31:31,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 01:31:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:31:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:31,610 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:31:31,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 01:31:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:31,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:31:31,669 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:31,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:31:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:31,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:31,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743699777] [2023-09-01 01:31:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743699777] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:31,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751091100] [2023-09-01 01:31:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 770 [2023-09-01 01:31:31,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:31,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:31,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 770 [2023-09-01 01:31:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:47,252 INFO L130 PetriNetUnfolder]: 119079/170709 cut-off events. [2023-09-01 01:31:47,252 INFO L131 PetriNetUnfolder]: For 55947/55947 co-relation queries the response was YES.