./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:13:08,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:13:08,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:13:08,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:13:08,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:13:08,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:13:08,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:13:08,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:13:08,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:13:08,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:13:08,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:13:08,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:13:08,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:13:08,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:13:08,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:13:08,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:13:08,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:13:08,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:13:08,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:13:08,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:13:08,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:13:08,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:13:08,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:13:08,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:13:08,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:13:08,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:13:08,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:13:08,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:13:08,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:13:08,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:13:08,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:13:08,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:13:08,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:13:08,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:13:08,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:13:08,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:13:08,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:13:08,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:13:08,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:13:08,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:13:08,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:13:08,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:13:08,157 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:13:08,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:13:08,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:13:08,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:13:08,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:13:08,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:13:08,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:13:08,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:13:08,160 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:13:08,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:13:08,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:13:08,161 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:13:08,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:13:08,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:13:08,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:13:08,161 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:13:08,162 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:13:08,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:13:08,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:13:08,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:13:08,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:13:08,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:13:08,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:13:08,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:13:08,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:13:08,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:13:08,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:13:08,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:13:08,165 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:13:08,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:13:08,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:13:08,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:13:08,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:13:08,492 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:13:08,492 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:13:08,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-09-01 03:13:09,770 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:13:10,002 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:13:10,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-09-01 03:13:10,015 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f279dc475/81d9b8554f2d429d83e20b3902ea508d/FLAGc4bdbb546 [2023-09-01 03:13:10,044 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f279dc475/81d9b8554f2d429d83e20b3902ea508d [2023-09-01 03:13:10,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:13:10,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:13:10,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:10,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:13:10,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:13:10,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:10" (1/1) ... [2023-09-01 03:13:10,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bea108e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:10, skipping insertion in model container [2023-09-01 03:13:10,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:10" (1/1) ... [2023-09-01 03:13:10,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:13:10,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:13:10,291 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-09-01 03:13:10,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:10,324 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:13:10,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47b2f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:10, skipping insertion in model container [2023-09-01 03:13:10,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:10,327 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:13:10,329 INFO L158 Benchmark]: Toolchain (without parser) took 279.45ms. Allocated memory is still 79.7MB. Free memory was 57.7MB in the beginning and 47.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:13:10,329 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:13:10,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.42ms. Allocated memory is still 79.7MB. Free memory was 57.5MB in the beginning and 47.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:13:10,331 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.42ms. Allocated memory is still 79.7MB. Free memory was 57.5MB in the beginning and 47.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:13:12,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:13:12,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:13:12,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:13:12,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:13:12,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:13:12,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:13:12,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:13:12,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:13:12,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:13:12,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:13:12,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:13:12,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:13:12,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:13:12,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:13:12,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:13:12,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:13:12,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:13:12,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:13:12,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:13:12,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:13:12,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:13:12,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:13:12,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:13:12,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:13:12,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:13:12,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:13:12,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:13:12,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:13:12,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:13:12,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:13:12,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:13:12,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:13:12,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:13:12,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:13:12,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:13:12,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:13:12,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:13:12,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:13:12,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:13:12,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:13:12,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:13:12,157 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:13:12,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:13:12,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:13:12,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:13:12,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:13:12,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:13:12,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:13:12,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:13:12,160 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:13:12,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:13:12,161 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:13:12,161 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:13:12,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:13:12,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:13:12,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:13:12,163 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:13:12,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:13:12,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:13:12,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:13:12,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:13:12,165 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:13:12,165 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:13:12,165 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:13:12,166 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:13:12,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:13:12,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:13:12,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:13:12,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:13:12,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:13:12,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:13:12,168 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:13:12,168 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:13:12,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:13:12,168 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:13:12,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:13:12,169 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:13:12,169 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:13:12,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:13:12,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:13:12,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:13:12,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:13:12,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:13:12,550 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:13:12,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-09-01 03:13:13,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:13:14,144 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:13:14,145 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-09-01 03:13:14,157 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973c1b97b/834aaac3a4914179883a48aa60ec900d/FLAG6e6603890 [2023-09-01 03:13:14,178 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973c1b97b/834aaac3a4914179883a48aa60ec900d [2023-09-01 03:13:14,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:13:14,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:13:14,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:14,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:13:14,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:13:14,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2877e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14, skipping insertion in model container [2023-09-01 03:13:14,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:13:14,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:13:14,452 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-09-01 03:13:14,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:14,491 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:13:14,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:13:14,538 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-09-01 03:13:14,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:14,548 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:13:14,574 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2023-09-01 03:13:14,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:14,585 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:13:14,585 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:13:14,591 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:13:14,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14 WrapperNode [2023-09-01 03:13:14,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:14,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:13:14,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:13:14,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:13:14,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,659 INFO L138 Inliner]: procedures = 29, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 344 [2023-09-01 03:13:14,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:13:14,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:13:14,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:13:14,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:13:14,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:13:14,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:13:14,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:13:14,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:13:14,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (1/1) ... [2023-09-01 03:13:14,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:13:14,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:13:14,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:13:14,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:13:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:13:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:13:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:13:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:13:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:13:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:13:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:13:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:13:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:13:14,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:13:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:13:14,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:13:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:13:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:13:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:13:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:13:14,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:13:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:13:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:13:14,778 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:13:14,925 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:13:14,927 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:13:15,829 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:13:16,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:13:16,132 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-09-01 03:13:16,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:13:16 BoogieIcfgContainer [2023-09-01 03:13:16,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:13:16,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:13:16,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:13:16,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:13:16,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:13:14" (1/3) ... [2023-09-01 03:13:16,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e5f170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:13:16, skipping insertion in model container [2023-09-01 03:13:16,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:14" (2/3) ... [2023-09-01 03:13:16,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e5f170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:13:16, skipping insertion in model container [2023-09-01 03:13:16,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:13:16" (3/3) ... [2023-09-01 03:13:16,145 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-09-01 03:13:16,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:13:16,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-09-01 03:13:16,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:13:16,291 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:13:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 283 transitions, 598 flow [2023-09-01 03:13:16,482 INFO L130 PetriNetUnfolder]: 22/279 cut-off events. [2023-09-01 03:13:16,483 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:13:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 279 events. 22/279 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-09-01 03:13:16,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 283 transitions, 598 flow [2023-09-01 03:13:16,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 275 transitions, 574 flow [2023-09-01 03:13:16,512 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:13:16,521 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 275 transitions, 574 flow [2023-09-01 03:13:16,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 275 transitions, 574 flow [2023-09-01 03:13:16,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-09-01 03:13:16,586 INFO L130 PetriNetUnfolder]: 22/275 cut-off events. [2023-09-01 03:13:16,587 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:13:16,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 275 events. 22/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 283 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 229. Up to 2 conditions per place. [2023-09-01 03:13:16,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 3860 [2023-09-01 03:13:44,364 WARN L222 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 141 DAG size of output: 140 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 03:13:51,458 WARN L222 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 144 DAG size of output: 143 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 03:13:51,851 INFO L134 LiptonReduction]: Checked pairs total: 6763 [2023-09-01 03:13:51,851 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-09-01 03:13:51,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:13:51,885 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;@1bb35db9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:13:51,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-09-01 03:13:51,892 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:13:51,892 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:13:51,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:51,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:13:51,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:13:51,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 43525, now seen corresponding path program 1 times [2023-09-01 03:13:51,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:51,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863950852] [2023-09-01 03:13:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:51,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:51,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:13:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:13:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:52,189 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:13:52,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:13:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:52,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:52,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863950852] [2023-09-01 03:13:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863950852] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:52,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:13:52,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780389565] [2023-09-01 03:13:52,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:13:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:13:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:13:52,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-09-01 03:13:52,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:52,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:52,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-09-01 03:13:52,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:57,814 INFO L130 PetriNetUnfolder]: 31011/38240 cut-off events. [2023-09-01 03:13:57,816 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2023-09-01 03:13:57,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76701 conditions, 38240 events. 31011/38240 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 2909. Compared 195022 event pairs, 19709 based on Foata normal form. 0/8099 useless extension candidates. Maximal degree in co-relation 69825. Up to 37645 conditions per place. [2023-09-01 03:13:58,264 INFO L137 encePairwiseOnDemand]: 563/570 looper letters, 61 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-09-01 03:13:58,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 284 flow [2023-09-01 03:13:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:13:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:13:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-09-01 03:13:58,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43450292397660817 [2023-09-01 03:13:58,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-09-01 03:13:58,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-09-01 03:13:58,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:58,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-09-01 03:13:58,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:58,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:58,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:58,307 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 172 flow. Second operand 3 states and 743 transitions. [2023-09-01 03:13:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 284 flow [2023-09-01 03:13:58,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:13:58,351 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 146 flow [2023-09-01 03:13:58,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-09-01 03:13:58,359 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -12 predicate places. [2023-09-01 03:13:58,359 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 146 flow [2023-09-01 03:13:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:58,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:58,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:13:58,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:13:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:58,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:13:58,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 43524, now seen corresponding path program 1 times [2023-09-01 03:13:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008175681] [2023-09-01 03:13:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:58,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:58,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:58,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:58,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:13:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:13:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:58,861 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:13:58,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:13:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:58,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:58,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008175681] [2023-09-01 03:13:58,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008175681] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:58,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:58,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:13:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218618766] [2023-09-01 03:13:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:13:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:58,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:13:58,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:13:59,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 570 [2023-09-01 03:13:59,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:59,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:59,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 570 [2023-09-01 03:13:59,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:06,299 INFO L130 PetriNetUnfolder]: 62007/76462 cut-off events. [2023-09-01 03:14:06,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:14:06,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152341 conditions, 76462 events. 62007/76462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5212. Compared 416257 event pairs, 39415 based on Foata normal form. 0/17080 useless extension candidates. Maximal degree in co-relation 152335. Up to 37641 conditions per place. [2023-09-01 03:14:06,950 INFO L137 encePairwiseOnDemand]: 561/570 looper letters, 114 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2023-09-01 03:14:06,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 126 transitions, 510 flow [2023-09-01 03:14:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:14:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:14:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-09-01 03:14:06,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 03:14:06,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-09-01 03:14:06,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-09-01 03:14:06,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:06,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-09-01 03:14:06,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:06,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:06,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:06,961 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 146 flow. Second operand 3 states and 798 transitions. [2023-09-01 03:14:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 126 transitions, 510 flow [2023-09-01 03:14:06,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:14:06,964 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 195 flow [2023-09-01 03:14:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-09-01 03:14:06,965 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2023-09-01 03:14:06,966 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 195 flow [2023-09-01 03:14:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:06,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:06,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:14:06,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:07,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:07,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:14:07,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:07,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1353150, now seen corresponding path program 1 times [2023-09-01 03:14:07,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176887333] [2023-09-01 03:14:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:07,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:07,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:07,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:14:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:14:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:07,479 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:14:07,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:14:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:07,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:07,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:07,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176887333] [2023-09-01 03:14:07,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176887333] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:07,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:07,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:14:07,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578001707] [2023-09-01 03:14:07,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:14:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:14:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:14:08,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 570 [2023-09-01 03:14:08,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:08,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:08,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 570 [2023-09-01 03:14:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:20,653 INFO L130 PetriNetUnfolder]: 93013/114700 cut-off events. [2023-09-01 03:14:20,653 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:14:20,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228565 conditions, 114700 events. 93013/114700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7572. Compared 649763 event pairs, 59121 based on Foata normal form. 0/26082 useless extension candidates. Maximal degree in co-relation 228556. Up to 37647 conditions per place. [2023-09-01 03:14:21,368 INFO L137 encePairwiseOnDemand]: 558/570 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-09-01 03:14:21,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 200 transitions, 895 flow [2023-09-01 03:14:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:14:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:14:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1463 transitions. [2023-09-01 03:14:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-09-01 03:14:21,373 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1463 transitions. [2023-09-01 03:14:21,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1463 transitions. [2023-09-01 03:14:21,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:21,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1463 transitions. [2023-09-01 03:14:21,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.83333333333334) internal successors, (1463), 6 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:21,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:21,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:21,385 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 195 flow. Second operand 6 states and 1463 transitions. [2023-09-01 03:14:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 200 transitions, 895 flow [2023-09-01 03:14:21,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 200 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:14:21,389 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 387 flow [2023-09-01 03:14:21,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2023-09-01 03:14:21,390 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2023-09-01 03:14:21,390 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 387 flow [2023-09-01 03:14:21,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:21,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:21,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:14:21,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 03:14:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:21,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:14:21,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 41980588, now seen corresponding path program 1 times [2023-09-01 03:14:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:21,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514831603] [2023-09-01 03:14:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:21,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:21,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:21,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:14:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:14:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:21,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:21,926 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 03:14:21,927 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 3 case distinctions, treesize of input 18 treesize of output 41 [2023-09-01 03:14:21,978 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-09-01 03:14:21,979 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 148 treesize of output 145 [2023-09-01 03:14:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:22,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:14:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:22,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:14:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:22,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:14:22,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514831603] [2023-09-01 03:14:22,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514831603] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:14:22,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:14:22,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:14:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671680221] [2023-09-01 03:14:22,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:14:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:14:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:14:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:14:22,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 570 [2023-09-01 03:14:22,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:22,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:22,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 570 [2023-09-01 03:14:22,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:31,553 INFO L130 PetriNetUnfolder]: 74559/92568 cut-off events. [2023-09-01 03:14:31,554 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 03:14:31,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184365 conditions, 92568 events. 74559/92568 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5988. Compared 523867 event pairs, 46947 based on Foata normal form. 0/21482 useless extension candidates. Maximal degree in co-relation 184352. Up to 90783 conditions per place. [2023-09-01 03:14:32,224 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 83 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-09-01 03:14:32,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 535 flow [2023-09-01 03:14:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:14:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:14:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-09-01 03:14:32,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450292397660819 [2023-09-01 03:14:32,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-09-01 03:14:32,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-09-01 03:14:32,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:32,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-09-01 03:14:32,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:32,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:32,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:32,235 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 387 flow. Second operand 3 states and 761 transitions. [2023-09-01 03:14:32,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 535 flow [2023-09-01 03:14:32,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 03:14:32,239 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 339 flow [2023-09-01 03:14:32,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2023-09-01 03:14:32,240 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2023-09-01 03:14:32,240 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 339 flow [2023-09-01 03:14:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:32,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:32,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:14:32,254 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 (5)] Ended with exit code 0 [2023-09-01 03:14:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:32,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:14:32,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 41980586, now seen corresponding path program 1 times [2023-09-01 03:14:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008622274] [2023-09-01 03:14:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:32,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:32,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:14:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:14:32,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:32,716 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-09-01 03:14:32,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-09-01 03:14:33,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:33,504 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-09-01 03:14:33,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-09-01 03:14:34,545 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-09-01 03:14:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-09-01 03:15:55,960 WARN L222 SmtUtils]: Spent 50.48s on a formula simplification. DAG size of input: 326 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:15:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:15:55,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:15:55,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:55,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008622274] [2023-09-01 03:15:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008622274] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:15:55,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:15:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:15:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889361897] [2023-09-01 03:15:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:15:55,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:15:55,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:15:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 03:16:04,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:16:06,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 570 [2023-09-01 03:16:06,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:06,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:06,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 570 [2023-09-01 03:16:06,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:12,752 INFO L130 PetriNetUnfolder]: 56077/70408 cut-off events. [2023-09-01 03:16:12,752 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:16:13,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140019 conditions, 70408 events. 56077/70408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4240. Compared 399859 event pairs, 34767 based on Foata normal form. 0/18647 useless extension candidates. Maximal degree in co-relation 140005. Up to 68623 conditions per place. [2023-09-01 03:16:13,556 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-09-01 03:16:13,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 479 flow [2023-09-01 03:16:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-09-01 03:16:13,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2023-09-01 03:16:13,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-09-01 03:16:13,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-09-01 03:16:13,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:13,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-09-01 03:16:13,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:13,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:13,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:13,569 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 339 flow. Second operand 3 states and 648 transitions. [2023-09-01 03:16:13,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 479 flow [2023-09-01 03:16:13,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:13,573 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 320 flow [2023-09-01 03:16:13,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2023-09-01 03:16:13,575 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2023-09-01 03:16:13,576 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 320 flow [2023-09-01 03:16:13,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:13,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:13,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:13,591 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 [2023-09-01 03:16:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:13,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:16:13,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671869, now seen corresponding path program 1 times [2023-09-01 03:16:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:13,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214078068] [2023-09-01 03:16:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:13,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:13,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:13,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:13,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:16:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:16:13,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,300 INFO L321 Elim1Store]: treesize reduction 150, result has 25.7 percent of original size [2023-09-01 03:16:14,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 172 treesize of output 206 [2023-09-01 03:16:14,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,483 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-09-01 03:16:14,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-09-01 03:16:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:16:14,624 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:16:14,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 03:16:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:14,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:16:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:14,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:14,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214078068] [2023-09-01 03:16:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214078068] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:14,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:14,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:16:14,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197196644] [2023-09-01 03:16:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:16:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:16:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:16:16,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-09-01 03:16:16,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:16,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:16,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-09-01 03:16:16,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:22,631 INFO L130 PetriNetUnfolder]: 54304/68089 cut-off events. [2023-09-01 03:16:22,631 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:16:22,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135382 conditions, 68089 events. 54304/68089 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4098. Compared 383580 event pairs, 33462 based on Foata normal form. 0/18284 useless extension candidates. Maximal degree in co-relation 135367. Up to 66304 conditions per place. [2023-09-01 03:16:23,108 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-09-01 03:16:23,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 472 flow [2023-09-01 03:16:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-09-01 03:16:23,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43216374269005847 [2023-09-01 03:16:23,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-09-01 03:16:23,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-09-01 03:16:23,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:23,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-09-01 03:16:23,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,118 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 320 flow. Second operand 3 states and 739 transitions. [2023-09-01 03:16:23,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 472 flow [2023-09-01 03:16:23,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:23,121 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 317 flow [2023-09-01 03:16:23,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-09-01 03:16:23,124 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2023-09-01 03:16:23,124 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 317 flow [2023-09-01 03:16:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:23,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:16:23,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1688671867, now seen corresponding path program 1 times [2023-09-01 03:16:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:23,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941633943] [2023-09-01 03:16:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:23,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:23,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:23,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:16:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:16:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:23,554 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-09-01 03:16:23,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-09-01 03:16:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:23,761 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 03:16:23,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 03:16:23,899 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 03:16:23,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 03:16:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:23,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:23,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:23,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941633943] [2023-09-01 03:16:23,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941633943] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:23,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:23,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715078299] [2023-09-01 03:16:23,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:23,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:23,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:24,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 570 [2023-09-01 03:16:24,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:24,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:24,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 570 [2023-09-01 03:16:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:31,143 INFO L130 PetriNetUnfolder]: 52531/65770 cut-off events. [2023-09-01 03:16:31,143 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:16:31,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130745 conditions, 65770 events. 52531/65770 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 367809 event pairs, 32157 based on Foata normal form. 0/17921 useless extension candidates. Maximal degree in co-relation 130729. Up to 63985 conditions per place. [2023-09-01 03:16:31,608 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 03:16:31,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 465 flow [2023-09-01 03:16:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-09-01 03:16:31,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439766081871345 [2023-09-01 03:16:31,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-09-01 03:16:31,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-09-01 03:16:31,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:31,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-09-01 03:16:31,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:31,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:31,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:31,616 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 317 flow. Second operand 3 states and 752 transitions. [2023-09-01 03:16:31,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 465 flow [2023-09-01 03:16:31,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:31,619 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 314 flow [2023-09-01 03:16:31,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2023-09-01 03:16:31,620 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2023-09-01 03:16:31,620 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 314 flow [2023-09-01 03:16:31,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:16:31,632 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 [2023-09-01 03:16:31,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:31,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:16:31,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1660864644, now seen corresponding path program 2 times [2023-09-01 03:16:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879951194] [2023-09-01 03:16:31,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:16:31,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:31,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:31,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:16:31,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:16:31,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:16:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:16:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:32,094 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:16:32,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:16:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:32,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:32,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:32,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879951194] [2023-09-01 03:16:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879951194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:32,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:32,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:16:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163954590] [2023-09-01 03:16:32,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:32,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:16:32,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:16:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:16:38,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 570 [2023-09-01 03:16:38,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:38,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:38,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 570 [2023-09-01 03:16:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:41,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:43,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:44,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:45,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:48,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:50,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:52,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:54,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:56,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:59,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:01,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:02,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:30,829 INFO L130 PetriNetUnfolder]: 174958/219066 cut-off events. [2023-09-01 03:17:30,829 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 03:17:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435358 conditions, 219066 events. 174958/219066 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 9053. Compared 1335381 event pairs, 107163 based on Foata normal form. 16/63223 useless extension candidates. Maximal degree in co-relation 435341. Up to 21341 conditions per place. [2023-09-01 03:17:32,722 INFO L137 encePairwiseOnDemand]: 560/570 looper letters, 459 selfloop transitions, 53 changer transitions 0/518 dead transitions. [2023-09-01 03:17:32,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 518 transitions, 2450 flow [2023-09-01 03:17:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:17:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:17:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3723 transitions. [2023-09-01 03:17:32,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543859649122807 [2023-09-01 03:17:32,734 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3723 transitions. [2023-09-01 03:17:32,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3723 transitions. [2023-09-01 03:17:32,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:32,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3723 transitions. [2023-09-01 03:17:32,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 248.2) internal successors, (3723), 15 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:32,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:32,759 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 570.0) internal successors, (9120), 16 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:32,759 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 314 flow. Second operand 15 states and 3723 transitions. [2023-09-01 03:17:32,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 518 transitions, 2450 flow [2023-09-01 03:17:32,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 518 transitions, 2449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:17:32,769 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 711 flow [2023-09-01 03:17:32,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=711, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2023-09-01 03:17:32,772 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 17 predicate places. [2023-09-01 03:17:32,772 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 711 flow [2023-09-01 03:17:32,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:32,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:32,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:32,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:32,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:32,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:17:32,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 809212574, now seen corresponding path program 1 times [2023-09-01 03:17:32,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:32,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704340684] [2023-09-01 03:17:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:17:32,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:32,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:32,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:17:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:17:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:17:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:17:33,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:33,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704340684] [2023-09-01 03:17:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704340684] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:33,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:17:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016764769] [2023-09-01 03:17:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:33,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:17:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:17:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:17:33,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 570 [2023-09-01 03:17:33,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 711 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:33,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:33,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 570 [2023-09-01 03:17:33,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand