./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:11:52,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:11:52,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:11:52,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:11:52,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:11:52,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:11:52,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:11:52,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:11:52,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:11:52,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:11:52,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:11:52,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:11:52,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:11:52,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:11:52,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:11:52,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:11:52,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:11:52,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:11:52,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:11:52,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:11:52,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:11:52,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:11:52,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:11:52,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:11:52,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:11:52,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:11:52,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:11:52,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:11:52,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:11:52,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:11:52,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:11:52,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:11:52,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:11:52,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:11:52,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:11:52,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:11:52,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:11:52,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:11:52,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:11:52,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:11:52,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:11:52,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:11:52,944 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:11:52,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:11:52,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:11:52,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:11:52,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:11:52,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:11:52,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:11:52,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:11:52,948 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:11:52,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:11:52,948 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:11:52,949 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:11:52,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:11:52,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:11:52,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:11:52,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:11:52,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:11:52,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:11:52,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:11:52,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:11:52,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:11:52,952 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:11:52,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:11:53,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:11:53,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:11:53,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:11:53,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:11:53,207 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:11:53,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 00:11:54,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:11:54,347 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:11:54,348 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 00:11:54,353 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d46448da/44a34447a606477587f89534526e03bc/FLAG6284fbe2e [2023-08-30 00:11:54,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d46448da/44a34447a606477587f89534526e03bc [2023-08-30 00:11:54,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:11:54,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:11:54,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:11:54,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:11:54,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:11:54,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:11:54" (1/1) ... [2023-08-30 00:11:54,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d95d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:54, skipping insertion in model container [2023-08-30 00:11:54,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:11:54" (1/1) ... [2023-08-30 00:11:54,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:11:54,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:11:54,526 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 00:11:54,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:11:54,539 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:11:54,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33502e59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:54, skipping insertion in model container [2023-08-30 00:11:54,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:11:54,540 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:11:54,541 INFO L158 Benchmark]: Toolchain (without parser) took 173.48ms. Allocated memory is still 73.4MB. Free memory was 44.8MB in the beginning and 34.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:11:54,542 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 94.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:11:54,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.89ms. Allocated memory is still 73.4MB. Free memory was 44.6MB in the beginning and 34.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:11:54,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 94.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.89ms. Allocated memory is still 73.4MB. Free memory was 44.6MB in the beginning and 34.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 143]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:11:56,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:11:56,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:11:56,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:11:56,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:11:56,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:11:56,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:11:56,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:11:56,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:11:56,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:11:56,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:11:56,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:11:56,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:11:56,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:11:56,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:11:56,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:11:56,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:11:56,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:11:56,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:11:56,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:11:56,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:11:56,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:11:56,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:11:56,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:11:56,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:11:56,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:11:56,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:11:56,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:11:56,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:11:56,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:11:56,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:11:56,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:11:56,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:11:56,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:11:56,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:11:56,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:11:56,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:11:56,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:11:56,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:11:56,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:11:56,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:11:56,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:11:56,296 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:11:56,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:11:56,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:11:56,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:11:56,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:11:56,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:11:56,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:11:56,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:11:56,299 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:11:56,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:11:56,300 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:11:56,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:11:56,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:11:56,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:11:56,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:11:56,302 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:11:56,302 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:11:56,302 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:11:56,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:11:56,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:11:56,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:11:56,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:11:56,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:11:56,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:11:56,303 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:11:56,303 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:11:56,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:11:56,304 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:11:56,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:11:56,304 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:11:56,304 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:11:56,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:11:56,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:11:56,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:11:56,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:11:56,591 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:11:56,591 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:11:56,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 00:11:57,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:11:57,768 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:11:57,768 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 00:11:57,786 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392b0fa57/dc5facfd7b184ffdb7e4bbf665b1aaf1/FLAG8f73f6bad [2023-08-30 00:11:57,796 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392b0fa57/dc5facfd7b184ffdb7e4bbf665b1aaf1 [2023-08-30 00:11:57,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:11:57,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:11:57,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:11:57,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:11:57,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:11:57,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:11:57" (1/1) ... [2023-08-30 00:11:57,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeccc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:57, skipping insertion in model container [2023-08-30 00:11:57,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:11:57" (1/1) ... [2023-08-30 00:11:57,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:11:57,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:11:58,007 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 00:11:58,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:11:58,035 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:11:58,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:11:58,072 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 00:11:58,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:11:58,083 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:11:58,112 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 00:11:58,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:11:58,128 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:11:58,128 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:11:58,133 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:11:58,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58 WrapperNode [2023-08-30 00:11:58,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:11:58,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:11:58,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:11:58,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:11:58,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,183 INFO L138 Inliner]: procedures = 29, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-08-30 00:11:58,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:11:58,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:11:58,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:11:58,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:11:58,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:11:58,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:11:58,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:11:58,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:11:58,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (1/1) ... [2023-08-30 00:11:58,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:11:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:11:58,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:11:58,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:11:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:11:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:11:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:11:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:11:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:11:58,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:11:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:11:58,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:11:58,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:11:58,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:11:58,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:11:58,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:11:58,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 00:11:58,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 00:11:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:11:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:11:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:11:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:11:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:11:58,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:11:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:11:58,330 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:11:58,432 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:11:58,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:11:58,924 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:11:59,078 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:11:59,078 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:11:59,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:11:59 BoogieIcfgContainer [2023-08-30 00:11:59,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:11:59,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:11:59,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:11:59,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:11:59,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:11:57" (1/3) ... [2023-08-30 00:11:59,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a7a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:11:59, skipping insertion in model container [2023-08-30 00:11:59,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:11:58" (2/3) ... [2023-08-30 00:11:59,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a7a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:11:59, skipping insertion in model container [2023-08-30 00:11:59,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:11:59" (3/3) ... [2023-08-30 00:11:59,088 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2023-08-30 00:11:59,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:11:59,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-08-30 00:11:59,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:11:59,201 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 00:11:59,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 233 transitions, 506 flow [2023-08-30 00:11:59,328 INFO L130 PetriNetUnfolder]: 14/228 cut-off events. [2023-08-30 00:11:59,328 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:11:59,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 14/228 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 355 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-08-30 00:11:59,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 233 transitions, 506 flow [2023-08-30 00:11:59,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 224 transitions, 478 flow [2023-08-30 00:11:59,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:11:59,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 224 transitions, 478 flow [2023-08-30 00:11:59,358 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 224 transitions, 478 flow [2023-08-30 00:11:59,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 224 transitions, 478 flow [2023-08-30 00:11:59,402 INFO L130 PetriNetUnfolder]: 14/224 cut-off events. [2023-08-30 00:11:59,402 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 00:11:59,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 224 events. 14/224 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 357 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-08-30 00:11:59,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 8466 [2023-08-30 00:12:23,803 INFO L134 LiptonReduction]: Checked pairs total: 13254 [2023-08-30 00:12:23,803 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-30 00:12:23,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:12:23,816 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;@452b0c68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:12:23,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-08-30 00:12:23,818 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:12:23,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:12:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:23,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:12:23,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:23,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 31246, now seen corresponding path program 1 times [2023-08-30 00:12:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:23,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622289864] [2023-08-30 00:12:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:23,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:23,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:23,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:23,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:12:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:12:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:24,067 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-08-30 00:12:24,068 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 5 case distinctions, treesize of input 21 treesize of output 93 [2023-08-30 00:12:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:24,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:12:24,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622289864] [2023-08-30 00:12:24,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622289864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:12:24,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:12:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:12:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176503905] [2023-08-30 00:12:24,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:12:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:12:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:12:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:12:24,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 00:12:24,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:24,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:24,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 00:12:24,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:29,491 INFO L130 PetriNetUnfolder]: 65876/79025 cut-off events. [2023-08-30 00:12:29,491 INFO L131 PetriNetUnfolder]: For 614/614 co-relation queries the response was YES. [2023-08-30 00:12:29,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160498 conditions, 79025 events. 65876/79025 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375001 event pairs, 42198 based on Foata normal form. 0/30999 useless extension candidates. Maximal degree in co-relation 144276. Up to 78857 conditions per place. [2023-08-30 00:12:29,903 INFO L137 encePairwiseOnDemand]: 435/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 00:12:29,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 302 flow [2023-08-30 00:12:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:12:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:12:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-30 00:12:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47185185185185186 [2023-08-30 00:12:29,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-30 00:12:29,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-30 00:12:29,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-30 00:12:29,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:29,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:29,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:29,935 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 200 flow. Second operand 3 states and 637 transitions. [2023-08-30 00:12:29,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 302 flow [2023-08-30 00:12:30,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-30 00:12:30,150 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 154 flow [2023-08-30 00:12:30,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=154, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 00:12:30,153 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2023-08-30 00:12:30,153 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 154 flow [2023-08-30 00:12:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:30,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:30,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:12:30,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 00:12:30,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:30,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:30,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash 31317, now seen corresponding path program 1 times [2023-08-30 00:12:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:30,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799845548] [2023-08-30 00:12:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:30,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:30,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:30,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:30,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:12:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:12:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:30,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:12:30,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:30,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799845548] [2023-08-30 00:12:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799845548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:12:30,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:12:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:12:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134787841] [2023-08-30 00:12:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:12:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:12:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:12:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:12:30,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 450 [2023-08-30 00:12:30,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:30,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:30,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 450 [2023-08-30 00:12:30,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:34,711 INFO L130 PetriNetUnfolder]: 65876/79027 cut-off events. [2023-08-30 00:12:34,711 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:12:34,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159013 conditions, 79027 events. 65876/79027 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 374980 event pairs, 42198 based on Foata normal form. 0/31000 useless extension candidates. Maximal degree in co-relation 159007. Up to 78858 conditions per place. [2023-08-30 00:12:35,081 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-30 00:12:35,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 292 flow [2023-08-30 00:12:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:12:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:12:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-08-30 00:12:35,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762962962962963 [2023-08-30 00:12:35,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-08-30 00:12:35,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-08-30 00:12:35,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:35,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-08-30 00:12:35,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:35,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:35,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:35,088 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 154 flow. Second operand 3 states and 643 transitions. [2023-08-30 00:12:35,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 292 flow [2023-08-30 00:12:35,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:12:35,091 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 169 flow [2023-08-30 00:12:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-08-30 00:12:35,092 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-30 00:12:35,094 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 169 flow [2023-08-30 00:12:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:35,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:35,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:12:35,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 00:12:35,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:35,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:35,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash 31247, now seen corresponding path program 1 times [2023-08-30 00:12:35,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:35,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796296963] [2023-08-30 00:12:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:35,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:35,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:12:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:12:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:35,571 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 00:12:35,571 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 00:12:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:35,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:12:35,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796296963] [2023-08-30 00:12:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796296963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:12:35,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:12:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:12:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994159397] [2023-08-30 00:12:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:12:35,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:12:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:12:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:12:35,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 00:12:35,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:35,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:35,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 00:12:35,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:40,205 INFO L130 PetriNetUnfolder]: 65876/79026 cut-off events. [2023-08-30 00:12:40,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:12:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159019 conditions, 79026 events. 65876/79026 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375061 event pairs, 42198 based on Foata normal form. 1/31002 useless extension candidates. Maximal degree in co-relation 159011. Up to 78858 conditions per place. [2023-08-30 00:12:40,564 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-30 00:12:40,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 301 flow [2023-08-30 00:12:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:12:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:12:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-30 00:12:40,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-30 00:12:40,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-30 00:12:40,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-30 00:12:40,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:40,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-30 00:12:40,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:40,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:40,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:40,601 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 169 flow. Second operand 3 states and 625 transitions. [2023-08-30 00:12:40,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 301 flow [2023-08-30 00:12:40,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 297 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:12:40,603 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 173 flow [2023-08-30 00:12:40,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-30 00:12:40,604 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-08-30 00:12:40,604 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 173 flow [2023-08-30 00:12:40,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:40,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:40,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:12:40,613 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 [2023-08-30 00:12:40,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:40,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:40,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash 971020, now seen corresponding path program 1 times [2023-08-30 00:12:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:40,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501735984] [2023-08-30 00:12:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:40,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:40,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:12:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:12:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:41,076 INFO L321 Elim1Store]: treesize reduction 350, result has 9.3 percent of original size [2023-08-30 00:12:41,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2023-08-30 00:12:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:12:41,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:12:41,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501735984] [2023-08-30 00:12:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501735984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:12:41,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:12:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:12:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194111992] [2023-08-30 00:12:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:12:41,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:12:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:12:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:12:41,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 00:12:41,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:41,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:41,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 00:12:41,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:45,751 INFO L130 PetriNetUnfolder]: 55616/66965 cut-off events. [2023-08-30 00:12:45,752 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:12:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134899 conditions, 66965 events. 55616/66965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 315478 event pairs, 35418 based on Foata normal form. 0/26861 useless extension candidates. Maximal degree in co-relation 134889. Up to 66797 conditions per place. [2023-08-30 00:12:46,071 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 00:12:46,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 295 flow [2023-08-30 00:12:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:12:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:12:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-30 00:12:46,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614814814814815 [2023-08-30 00:12:46,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-30 00:12:46,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-30 00:12:46,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:46,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-30 00:12:46,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:46,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:46,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:12:46,078 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 173 flow. Second operand 3 states and 623 transitions. [2023-08-30 00:12:46,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 295 flow [2023-08-30 00:12:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:12:46,079 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 165 flow [2023-08-30 00:12:46,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-30 00:12:46,080 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-30 00:12:46,080 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 165 flow [2023-08-30 00:12:46,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:46,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:46,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:12:46,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:12:46,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:46,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:46,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 971019, now seen corresponding path program 1 times [2023-08-30 00:12:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:46,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995087986] [2023-08-30 00:12:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:46,288 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 [2023-08-30 00:12:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:46,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:46,291 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 (6)] Waiting until timeout for monitored process [2023-08-30 00:12:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:12:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:12:46,586 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-08-30 00:12:46,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-08-30 00:12:46,614 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 00:12:46,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 00:12:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:46,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:46,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995087986] [2023-08-30 00:12:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995087986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:46,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:12:46,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:12:46,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094096152] [2023-08-30 00:12:46,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:46,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:12:46,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:12:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:12:47,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 00:12:47,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:47,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:47,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 00:12:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:54,818 INFO L130 PetriNetUnfolder]: 100542/121441 cut-off events. [2023-08-30 00:12:54,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:12:54,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244778 conditions, 121441 events. 100542/121441 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5440. Compared 610210 event pairs, 63888 based on Foata normal form. 0/49548 useless extension candidates. Maximal degree in co-relation 244768. Up to 66328 conditions per place. [2023-08-30 00:12:55,374 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 121 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2023-08-30 00:12:55,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 585 flow [2023-08-30 00:12:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:12:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:12:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1373 transitions. [2023-08-30 00:12:55,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43587301587301586 [2023-08-30 00:12:55,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1373 transitions. [2023-08-30 00:12:55,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1373 transitions. [2023-08-30 00:12:55,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:55,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1373 transitions. [2023-08-30 00:12:55,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:55,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:55,410 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:55,410 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 165 flow. Second operand 7 states and 1373 transitions. [2023-08-30 00:12:55,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 585 flow [2023-08-30 00:12:55,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:12:55,414 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 227 flow [2023-08-30 00:12:55,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-30 00:12:55,432 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 00:12:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 227 flow [2023-08-30 00:12:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:12:55,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:12:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:55,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:12:55,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash 970950, now seen corresponding path program 1 times [2023-08-30 00:12:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814477231] [2023-08-30 00:12:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:12:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:55,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:12:55,644 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 (7)] Waiting until timeout for monitored process [2023-08-30 00:12:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:12:55,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:55,917 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 00:12:55,917 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 00:12:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:56,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:56,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:56,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814477231] [2023-08-30 00:12:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814477231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:56,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:12:56,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:12:56,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232973224] [2023-08-30 00:12:56,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:56,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:12:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:12:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:12:56,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 450 [2023-08-30 00:12:56,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:56,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:56,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 450 [2023-08-30 00:12:56,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:04,193 INFO L130 PetriNetUnfolder]: 100541/121438 cut-off events. [2023-08-30 00:13:04,193 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2023-08-30 00:13:04,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246592 conditions, 121438 events. 100541/121438 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 5254. Compared 608539 event pairs, 63888 based on Foata normal form. 3/51351 useless extension candidates. Maximal degree in co-relation 246578. Up to 66328 conditions per place. [2023-08-30 00:13:04,803 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 119 selfloop transitions, 8 changer transitions 0/133 dead transitions. [2023-08-30 00:13:04,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 607 flow [2023-08-30 00:13:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:13:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:13:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-30 00:13:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45037037037037037 [2023-08-30 00:13:04,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-30 00:13:04,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-30 00:13:04,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:04,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-30 00:13:04,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:04,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:04,811 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:04,812 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 227 flow. Second operand 6 states and 1216 transitions. [2023-08-30 00:13:04,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 607 flow [2023-08-30 00:13:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 591 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:13:04,814 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 221 flow [2023-08-30 00:13:04,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-08-30 00:13:04,815 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2023-08-30 00:13:04,815 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 221 flow [2023-08-30 00:13:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:04,822 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 (7)] Ended with exit code 0 [2023-08-30 00:13:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:05,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:13:05,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash 933171617, now seen corresponding path program 1 times [2023-08-30 00:13:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:05,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645967228] [2023-08-30 00:13:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:05,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:05,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:05,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:13:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 00:13:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:05,301 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2023-08-30 00:13:05,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2023-08-30 00:13:05,345 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 00:13:05,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2023-08-30 00:13:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:05,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:05,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645967228] [2023-08-30 00:13:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645967228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:05,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:05,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:13:05,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557521716] [2023-08-30 00:13:05,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:05,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:13:05,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:13:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:13:06,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 00:13:06,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:06,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:06,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 00:13:06,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:13,846 INFO L130 PetriNetUnfolder]: 97709/117994 cut-off events. [2023-08-30 00:13:13,846 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 00:13:14,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239704 conditions, 117994 events. 97709/117994 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5226. Compared 589881 event pairs, 62118 based on Foata normal form. 0/50263 useless extension candidates. Maximal degree in co-relation 239690. Up to 64610 conditions per place. [2023-08-30 00:13:14,510 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 120 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-08-30 00:13:14,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 591 flow [2023-08-30 00:13:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:13:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:13:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2023-08-30 00:13:14,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448 [2023-08-30 00:13:14,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2023-08-30 00:13:14,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2023-08-30 00:13:14,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:14,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2023-08-30 00:13:14,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:14,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:14,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:14,537 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 221 flow. Second operand 5 states and 1008 transitions. [2023-08-30 00:13:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 591 flow [2023-08-30 00:13:14,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 572 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 00:13:14,540 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 204 flow [2023-08-30 00:13:14,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-30 00:13:14,540 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 00:13:14,541 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 204 flow [2023-08-30 00:13:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:14,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:14,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:14,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:14,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:14,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:13:14,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 933171616, now seen corresponding path program 1 times [2023-08-30 00:13:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:14,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277773379] [2023-08-30 00:13:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:14,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:14,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:13:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:13:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:14,955 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2023-08-30 00:13:14,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2023-08-30 00:13:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:15,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:15,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:15,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277773379] [2023-08-30 00:13:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277773379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:15,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182008961] [2023-08-30 00:13:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:15,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 00:13:15,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:15,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:15,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 00:13:15,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:22,184 INFO L130 PetriNetUnfolder]: 95309/114982 cut-off events. [2023-08-30 00:13:22,184 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 00:13:22,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233709 conditions, 114982 events. 95309/114982 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5346. Compared 575476 event pairs, 60516 based on Foata normal form. 0/49212 useless extension candidates. Maximal degree in co-relation 233695. Up to 114646 conditions per place. [2023-08-30 00:13:22,750 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 00:13:22,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 330 flow [2023-08-30 00:13:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-30 00:13:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585185185185185 [2023-08-30 00:13:22,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-30 00:13:22,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-30 00:13:22,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:22,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-30 00:13:22,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:22,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:13:22,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:13:22,755 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 204 flow. Second operand 3 states and 619 transitions. [2023-08-30 00:13:22,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 330 flow [2023-08-30 00:13:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 325 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:13:22,757 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2023-08-30 00:13:22,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, 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=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-30 00:13:22,757 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -15 predicate places. [2023-08-30 00:13:22,757 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2023-08-30 00:13:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:22,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:22,766 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 (9)] Ended with exit code 0 [2023-08-30 00:13:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:22,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:13:22,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 933171359, now seen corresponding path program 1 times [2023-08-30 00:13:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:22,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087017384] [2023-08-30 00:13:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:22,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:22,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:22,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:13:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:13:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:23,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:13:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:23,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:23,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087017384] [2023-08-30 00:13:23,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087017384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:23,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:23,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:13:23,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657283583] [2023-08-30 00:13:23,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:23,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:13:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:13:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:13:24,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 450 [2023-08-30 00:13:24,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:24,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:24,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 450 [2023-08-30 00:13:24,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:30,854 INFO L130 PetriNetUnfolder]: 94877/114544 cut-off events. [2023-08-30 00:13:30,855 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 00:13:31,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232802 conditions, 114544 events. 94877/114544 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5198. Compared 571440 event pairs, 60348 based on Foata normal form. 0/49176 useless extension candidates. Maximal degree in co-relation 232788. Up to 62883 conditions per place. [2023-08-30 00:13:31,438 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 111 selfloop transitions, 8 changer transitions 0/123 dead transitions. [2023-08-30 00:13:31,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 555 flow [2023-08-30 00:13:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:13:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:13:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1379 transitions. [2023-08-30 00:13:31,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2023-08-30 00:13:31,441 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1379 transitions. [2023-08-30 00:13:31,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1379 transitions. [2023-08-30 00:13:31,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:31,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1379 transitions. [2023-08-30 00:13:31,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:31,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:31,447 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:31,447 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 1379 transitions. [2023-08-30 00:13:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 555 flow [2023-08-30 00:13:31,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:31,449 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 216 flow [2023-08-30 00:13:31,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-08-30 00:13:31,450 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 00:13:31,450 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 216 flow [2023-08-30 00:13:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:31,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:31,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:31,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:31,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:31,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:13:31,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:31,659 INFO L85 PathProgramCache]: Analyzing trace with hash 933171358, now seen corresponding path program 1 times [2023-08-30 00:13:31,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:31,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60366338] [2023-08-30 00:13:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:31,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:31,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:13:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:13:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:31,866 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-08-30 00:13:31,866 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 5 case distinctions, treesize of input 21 treesize of output 93 [2023-08-30 00:13:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:31,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:31,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:31,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60366338] [2023-08-30 00:13:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60366338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:31,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:31,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:13:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34295431] [2023-08-30 00:13:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:31,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:13:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:13:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:13:32,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 450 [2023-08-30 00:13:32,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:32,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:32,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 450 [2023-08-30 00:13:32,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:35,116 INFO L130 PetriNetUnfolder]: 42107/51316 cut-off events. [2023-08-30 00:13:35,116 INFO L131 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2023-08-30 00:13:35,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104356 conditions, 51316 events. 42107/51316 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 241748 event pairs, 26336 based on Foata normal form. 0/26029 useless extension candidates. Maximal degree in co-relation 104341. Up to 51129 conditions per place. [2023-08-30 00:13:35,360 INFO L137 encePairwiseOnDemand]: 441/450 looper letters, 56 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-08-30 00:13:35,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 64 transitions, 328 flow [2023-08-30 00:13:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:13:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:13:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-08-30 00:13:35,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42944444444444446 [2023-08-30 00:13:35,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-08-30 00:13:35,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-08-30 00:13:35,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:35,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-08-30 00:13:35,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:35,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:35,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:35,367 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 216 flow. Second operand 4 states and 773 transitions. [2023-08-30 00:13:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 64 transitions, 328 flow [2023-08-30 00:13:35,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 313 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 00:13:35,368 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 201 flow [2023-08-30 00:13:35,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-08-30 00:13:35,371 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-08-30 00:13:35,371 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 201 flow [2023-08-30 00:13:35,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:35,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:35,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:13:35,388 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 [2023-08-30 00:13:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:35,578 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:13:35,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922673, now seen corresponding path program 2 times [2023-08-30 00:13:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244084489] [2023-08-30 00:13:35,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:13:35,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:35,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:35,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:35,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:13:35,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:13:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:13:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:13:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:35,865 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 00:13:35,865 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 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 00:13:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:36,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244084489] [2023-08-30 00:13:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244084489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:36,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:36,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:13:36,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610283030] [2023-08-30 00:13:36,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:36,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:13:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:13:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:13:39,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 450 [2023-08-30 00:13:39,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:39,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:39,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 450 [2023-08-30 00:13:39,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:58,911 INFO L130 PetriNetUnfolder]: 202871/247098 cut-off events. [2023-08-30 00:13:58,911 INFO L131 PetriNetUnfolder]: For 3224/3224 co-relation queries the response was YES. [2023-08-30 00:13:59,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504460 conditions, 247098 events. 202871/247098 cut-off events. For 3224/3224 co-relation queries the response was YES. Maximal size of possible extension queue 8121. Compared 1326161 event pairs, 127672 based on Foata normal form. 6/127270 useless extension candidates. Maximal degree in co-relation 504445. Up to 27892 conditions per place. [2023-08-30 00:14:00,421 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 466 selfloop transitions, 13 changer transitions 0/481 dead transitions. [2023-08-30 00:14:00,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 481 transitions, 2183 flow [2023-08-30 00:14:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:14:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:14:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2669 transitions. [2023-08-30 00:14:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49425925925925923 [2023-08-30 00:14:00,426 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2669 transitions. [2023-08-30 00:14:00,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2669 transitions. [2023-08-30 00:14:00,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:00,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2669 transitions. [2023-08-30 00:14:00,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 222.41666666666666) internal successors, (2669), 12 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,436 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,436 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 201 flow. Second operand 12 states and 2669 transitions. [2023-08-30 00:14:00,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 481 transitions, 2183 flow [2023-08-30 00:14:00,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 481 transitions, 2164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:14:00,441 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 296 flow [2023-08-30 00:14:00,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=296, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2023-08-30 00:14:00,441 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2023-08-30 00:14:00,442 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 296 flow [2023-08-30 00:14:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:00,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:14:00,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 00:14:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:00,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:14:00,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922604, now seen corresponding path program 2 times [2023-08-30 00:14:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:00,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986227500] [2023-08-30 00:14:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:14:00,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:00,651 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:00,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:14:00,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:14:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:14:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:14:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:00,977 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-08-30 00:14:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-08-30 00:14:01,001 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 00:14:01,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 00:14:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:14:01,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:01,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986227500] [2023-08-30 00:14:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986227500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:01,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:14:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818202786] [2023-08-30 00:14:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:14:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:14:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:14:01,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 450 [2023-08-30 00:14:01,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:01,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:01,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 450 [2023-08-30 00:14:01,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:15,384 INFO L130 PetriNetUnfolder]: 169670/207491 cut-off events. [2023-08-30 00:14:15,385 INFO L131 PetriNetUnfolder]: For 3234/3234 co-relation queries the response was YES. [2023-08-30 00:14:16,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419056 conditions, 207491 events. 169670/207491 cut-off events. For 3234/3234 co-relation queries the response was YES. Maximal size of possible extension queue 6993. Compared 1121498 event pairs, 105552 based on Foata normal form. 6400/110184 useless extension candidates. Maximal degree in co-relation 419034. Up to 206681 conditions per place. [2023-08-30 00:14:16,955 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 66 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 00:14:16,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 69 transitions, 404 flow [2023-08-30 00:14:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:14:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:14:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-30 00:14:16,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46074074074074073 [2023-08-30 00:14:16,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-30 00:14:16,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-30 00:14:16,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:16,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-30 00:14:16,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:16,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:14:16,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 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) [2023-08-30 00:14:16,961 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 296 flow. Second operand 3 states and 622 transitions. [2023-08-30 00:14:16,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 69 transitions, 404 flow [2023-08-30 00:14:16,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 69 transitions, 391 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 00:14:16,963 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 259 flow [2023-08-30 00:14:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2023-08-30 00:14:16,966 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2023-08-30 00:14:16,966 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 259 flow [2023-08-30 00:14:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:16,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:16,982 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 (13)] Ended with exit code 0 [2023-08-30 00:14:17,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:17,175 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 00:14:17,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -870216760, now seen corresponding path program 1 times [2023-08-30 00:14:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686571243] [2023-08-30 00:14:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:17,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:17,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:17,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:17,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:14:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:14:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:17,412 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2023-08-30 00:14:17,413 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 8 case distinctions, treesize of input 60 treesize of output 81 [2023-08-30 00:14:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:17,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:17,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686571243] [2023-08-30 00:14:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686571243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:17,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:14:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837097834] [2023-08-30 00:14:17,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:14:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:14:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:14:17,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 00:14:17,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:17,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:17,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 00:14:17,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand