./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i --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/goblint-regression/09-regions_24-evilcollapse_nr.i -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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --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 00:15:00,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:15:00,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:15:00,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:15:00,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:15:00,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:15:00,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:15:00,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:15:00,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:15:00,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:15:00,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:15:00,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:15:00,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:15:00,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:15:00,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:15:00,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:15:00,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:15:00,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:15:00,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:15:00,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:15:00,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:15:00,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:15:00,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:15:00,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:15:00,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:15:00,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:15:00,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:15:00,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:15:00,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:15:00,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:15:00,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:15:00,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:15:00,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:15:00,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:15:00,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:15:00,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:15:00,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:15:00,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:15:00,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:15:00,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:15:00,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:15:00,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:15:00,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:15:00,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:15:00,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:15:00,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:15:00,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:15:00,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:15:00,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:15:00,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:15:00,134 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:15:00,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:15:00,135 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:15:00,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:15:00,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:15:00,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:15:00,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:15:00,136 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:15:00,137 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:15:00,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:15:00,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:15:00,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:15:00,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:15:00,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:15:00,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:15:00,138 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:15:00,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:15:00,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:15:00,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:15:00,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:15:00,389 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:15:00,389 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:15:00,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-09-01 00:15:01,278 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:15:01,465 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:15:01,466 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-09-01 00:15:01,488 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cddfa863c/ed62d3e344074d8092a08f54ae36d550/FLAG87440dacf [2023-09-01 00:15:01,496 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cddfa863c/ed62d3e344074d8092a08f54ae36d550 [2023-09-01 00:15:01,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:15:01,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:15:01,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:15:01,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:15:01,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:15:01,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:01" (1/1) ... [2023-09-01 00:15:01,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4338e66a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:01, skipping insertion in model container [2023-09-01 00:15:01,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:01" (1/1) ... [2023-09-01 00:15:01,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:15:01,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:15:01,800 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:01,801 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:01,801 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:01,802 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:01,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:15:01,836 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 00:15:01,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15e52000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:01, skipping insertion in model container [2023-09-01 00:15:01,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:15:01,836 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 00:15:01,838 INFO L158 Benchmark]: Toolchain (without parser) took 338.58ms. Allocated memory is still 90.2MB. Free memory was 68.9MB in the beginning and 54.0MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 00:15:01,839 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:15:01,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.22ms. Allocated memory is still 90.2MB. Free memory was 68.9MB in the beginning and 54.0MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 00:15:01,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.22ms. Allocated memory is still 90.2MB. Free memory was 68.9MB in the beginning and 54.0MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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/goblint-regression/09-regions_24-evilcollapse_nr.i -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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --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 00:15:03,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:15:03,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:15:03,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:15:03,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:15:03,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:15:03,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:15:03,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:15:03,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:15:03,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:15:03,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:15:03,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:15:03,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:15:03,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:15:03,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:15:03,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:15:03,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:15:03,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:15:03,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:15:03,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:15:03,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:15:03,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:15:03,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:15:03,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:15:03,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:15:03,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:15:03,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:15:03,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:15:03,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:15:03,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:15:03,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:15:03,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:15:03,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:15:03,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:15:03,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:15:03,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:15:03,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:15:03,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:15:03,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:15:03,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:15:03,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:15:03,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 00:15:03,276 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:15:03,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:15:03,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:15:03,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:15:03,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:15:03,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:15:03,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:15:03,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:15:03,279 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:15:03,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:15:03,280 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:15:03,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:15:03,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:15:03,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:15:03,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:15:03,281 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:15:03,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:15:03,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:15:03,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:15:03,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:15:03,283 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 00:15:03,283 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 00:15:03,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:15:03,283 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:15:03,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:15:03,284 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 00:15:03,284 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:15:03,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:15:03,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:15:03,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:15:03,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:15:03,515 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:15:03,516 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:15:03,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-09-01 00:15:04,439 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:15:04,679 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:15:04,679 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_24-evilcollapse_nr.i [2023-09-01 00:15:04,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5576521de/1e30310feb4b4ef88b353baa157c5d58/FLAG14ae9f8dc [2023-09-01 00:15:04,708 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5576521de/1e30310feb4b4ef88b353baa157c5d58 [2023-09-01 00:15:04,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:15:04,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:15:04,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:15:04,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:15:04,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:15:04,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:04" (1/1) ... [2023-09-01 00:15:04,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e48f14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:04, skipping insertion in model container [2023-09-01 00:15:04,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:04" (1/1) ... [2023-09-01 00:15:04,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:15:04,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:15:05,040 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,040 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,041 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,042 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:15:05,091 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 00:15:05,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:15:05,122 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,123 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,123 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,124 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:15:05,156 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:15:05,176 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,176 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,176 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,176 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 00:15:05,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:15:05,237 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:15:05,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05 WrapperNode [2023-09-01 00:15:05,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:15:05,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:15:05,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:15:05,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:15:05,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,297 INFO L138 Inliner]: procedures = 276, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 157 [2023-09-01 00:15:05,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:15:05,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:15:05,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:15:05,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:15:05,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:15:05,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:15:05,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:15:05,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:15:05,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (1/1) ... [2023-09-01 00:15:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:15:05,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:15:05,372 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 00:15:05,382 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 00:15:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 00:15:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-09-01 00:15:05,396 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-09-01 00:15:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 00:15:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:15:05,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:15:05,398 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 00:15:05,553 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:15:05,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:15:05,966 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:15:05,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:15:05,972 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 00:15:05,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:05 BoogieIcfgContainer [2023-09-01 00:15:05,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:15:05,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:15:05,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:15:05,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:15:05,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:15:04" (1/3) ... [2023-09-01 00:15:05,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27dd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:05, skipping insertion in model container [2023-09-01 00:15:05,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:05" (2/3) ... [2023-09-01 00:15:05,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27dd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:05, skipping insertion in model container [2023-09-01 00:15:05,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:05" (3/3) ... [2023-09-01 00:15:05,981 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2023-09-01 00:15:05,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:15:05,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-09-01 00:15:05,992 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:15:06,084 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 00:15:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 256 transitions, 522 flow [2023-09-01 00:15:06,200 INFO L130 PetriNetUnfolder]: 17/254 cut-off events. [2023-09-01 00:15:06,200 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:15:06,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 254 events. 17/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 678 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-09-01 00:15:06,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 256 transitions, 522 flow [2023-09-01 00:15:06,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 254 transitions, 514 flow [2023-09-01 00:15:06,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:15:06,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 254 transitions, 514 flow [2023-09-01 00:15:06,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 254 transitions, 514 flow [2023-09-01 00:15:06,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 254 transitions, 514 flow [2023-09-01 00:15:06,280 INFO L130 PetriNetUnfolder]: 17/254 cut-off events. [2023-09-01 00:15:06,280 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:15:06,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 254 events. 17/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 683 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2023-09-01 00:15:06,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 7680 [2023-09-01 00:18:43,458 WARN L222 SmtUtils]: Spent 1.99m on a formula simplification. DAG size of input: 224 DAG size of output: 216 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:19:44,333 WARN L222 SmtUtils]: Spent 1.01m on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:21:39,841 WARN L222 SmtUtils]: Spent 1.93m on a formula simplification. DAG size of input: 224 DAG size of output: 216 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:22:44,923 WARN L222 SmtUtils]: Spent 1.08m on a formula simplification that was a NOOP. DAG size: 212 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 00:23:40,716 INFO L134 LiptonReduction]: Checked pairs total: 11909 [2023-09-01 00:23:40,717 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-09-01 00:23:40,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 00:23:40,728 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;@43477960, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:23:40,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-09-01 00:23:40,729 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 00:23:40,729 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:23:40,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:40,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:23:40,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:40,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 28412, now seen corresponding path program 1 times [2023-09-01 00:23:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250674056] [2023-09-01 00:23:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:40,756 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 00:23:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:40,757 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 00:23:40,760 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 00:23:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2023-09-01 00:23:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:23:40,864 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 00:23:40,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:23:40,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:23:40,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250674056] [2023-09-01 00:23:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250674056] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:23:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:23:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:23:40,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796467777] [2023-09-01 00:23:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:23:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 00:23:40,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:23:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 00:23:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 00:23:40,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-09-01 00:23:40,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 245.0) internal successors, (490), 2 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 00:23:40,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:23:40,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-09-01 00:23:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:23:41,705 INFO L130 PetriNetUnfolder]: 1547/2403 cut-off events. [2023-09-01 00:23:41,705 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 00:23:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2403 events. 1547/2403 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11228 event pairs, 1313 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 4796. Up to 2404 conditions per place. [2023-09-01 00:23:41,717 INFO L137 encePairwiseOnDemand]: 555/570 looper letters, 56 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2023-09-01 00:23:41,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 230 flow [2023-09-01 00:23:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 00:23:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 00:23:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 559 transitions. [2023-09-01 00:23:41,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903508771929825 [2023-09-01 00:23:41,734 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 559 transitions. [2023-09-01 00:23:41,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 559 transitions. [2023-09-01 00:23:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:23:41,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 559 transitions. [2023-09-01 00:23:41,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 279.5) internal successors, (559), 2 states have internal predecessors, (559), 0 states have call successors, (0), 0 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 00:23:41,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 570.0) internal successors, (1710), 3 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 00:23:41,749 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 570.0) internal successors, (1710), 3 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 00:23:41,753 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 148 flow. Second operand 2 states and 559 transitions. [2023-09-01 00:23:41,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 230 flow [2023-09-01 00:23:41,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:23:41,758 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 116 flow [2023-09-01 00:23:41,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-09-01 00:23:41,761 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -16 predicate places. [2023-09-01 00:23:41,761 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 116 flow [2023-09-01 00:23:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.0) internal successors, (490), 2 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 00:23:41,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:41,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:23:41,773 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 00:23:41,973 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 00:23:41,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:41,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 28504, now seen corresponding path program 1 times [2023-09-01 00:23:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677322436] [2023-09-01 00:23:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:41,975 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 00:23:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:41,976 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 00:23:41,978 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 00:23:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 00:23:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:23:42,047 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 00:23:42,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:23:42,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:23:42,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677322436] [2023-09-01 00:23:42,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677322436] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:23:42,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:23:42,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:23:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999527520] [2023-09-01 00:23:42,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:23:42,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:23:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:23:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:23:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:23:42,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 570 [2023-09-01 00:23:42,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 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 00:23:42,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:23:42,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 570 [2023-09-01 00:23:42,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:23:43,494 INFO L130 PetriNetUnfolder]: 1548/2413 cut-off events. [2023-09-01 00:23:43,495 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:23:43,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 2413 events. 1548/2413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11262 event pairs, 1313 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 4856. Up to 2404 conditions per place. [2023-09-01 00:23:43,502 INFO L137 encePairwiseOnDemand]: 561/570 looper letters, 64 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-09-01 00:23:43,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 268 flow [2023-09-01 00:23:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:23:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:23:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-09-01 00:23:43,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637426900584795 [2023-09-01 00:23:43,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-09-01 00:23:43,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-09-01 00:23:43,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:23:43,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-09-01 00:23:43,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 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 00:23:43,510 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 00:23:43,511 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 00:23:43,511 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 116 flow. Second operand 3 states and 793 transitions. [2023-09-01 00:23:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 268 flow [2023-09-01 00:23:43,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:23:43,513 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 140 flow [2023-09-01 00:23:43,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-09-01 00:23:43,514 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-09-01 00:23:43,515 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 140 flow [2023-09-01 00:23:43,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 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 00:23:43,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:43,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:23:43,547 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 00:23:43,734 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 00:23:43,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:43,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 28414, now seen corresponding path program 1 times [2023-09-01 00:23:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904664932] [2023-09-01 00:23:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:43,736 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 00:23:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:43,737 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 00:23:43,739 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 00:23:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 00:23:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:23:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:43,882 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 00:23:43,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-09-01 00:23:43,919 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 00:23:43,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:23:43,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:23:43,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904664932] [2023-09-01 00:23:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904664932] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:23:43,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:23:43,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:23:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323693896] [2023-09-01 00:23:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:23:43,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:23:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:23:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:23:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:23:44,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 570 [2023-09-01 00:23:44,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 00:23:44,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:23:44,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 570 [2023-09-01 00:23:44,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:23:45,507 INFO L130 PetriNetUnfolder]: 1551/2416 cut-off events. [2023-09-01 00:23:45,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:23:45,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4880 conditions, 2416 events. 1551/2416 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11271 event pairs, 1313 based on Foata normal form. 0/1127 useless extension candidates. Maximal degree in co-relation 4875. Up to 2413 conditions per place. [2023-09-01 00:23:45,515 INFO L137 encePairwiseOnDemand]: 562/570 looper letters, 59 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-09-01 00:23:45,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 285 flow [2023-09-01 00:23:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:23:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:23:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2023-09-01 00:23:45,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-09-01 00:23:45,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2023-09-01 00:23:45,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2023-09-01 00:23:45,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:23:45,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2023-09-01 00:23:45,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 00:23:45,525 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 00:23:45,526 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 00:23:45,526 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 140 flow. Second operand 3 states and 780 transitions. [2023-09-01 00:23:45,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 285 flow [2023-09-01 00:23:45,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:23:45,529 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 177 flow [2023-09-01 00:23:45,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-09-01 00:23:45,530 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2023-09-01 00:23:45,531 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 177 flow [2023-09-01 00:23:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 00:23:45,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:45,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:23:45,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 00:23:45,738 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 00:23:45,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:45,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash 28415, now seen corresponding path program 1 times [2023-09-01 00:23:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465643279] [2023-09-01 00:23:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:45,739 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 00:23:45,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:45,740 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 00:23:45,742 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 00:23:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 00:23:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:23:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:45,824 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 00:23:45,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2023-09-01 00:23:45,850 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 00:23:45,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:23:45,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:23:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465643279] [2023-09-01 00:23:45,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465643279] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:23:45,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:23:45,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:23:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619096566] [2023-09-01 00:23:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:23:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:23:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:23:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:23:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:23:46,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 570 [2023-09-01 00:23:46,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 00:23:46,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:23:46,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 570 [2023-09-01 00:23:46,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:23:47,001 INFO L130 PetriNetUnfolder]: 1491/2318 cut-off events. [2023-09-01 00:23:47,002 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:23:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2318 events. 1491/2318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11931 event pairs, 249 based on Foata normal form. 3/1090 useless extension candidates. Maximal degree in co-relation 4693. Up to 1822 conditions per place. [2023-09-01 00:23:47,009 INFO L137 encePairwiseOnDemand]: 562/570 looper letters, 83 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-09-01 00:23:47,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 391 flow [2023-09-01 00:23:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:23:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:23:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-09-01 00:23:47,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-09-01 00:23:47,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-09-01 00:23:47,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-09-01 00:23:47,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:23:47,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-09-01 00:23:47,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 00:23:47,016 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 00:23:47,017 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 00:23:47,017 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 177 flow. Second operand 3 states and 800 transitions. [2023-09-01 00:23:47,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 391 flow [2023-09-01 00:23:47,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:23:47,020 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 170 flow [2023-09-01 00:23:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-09-01 00:23:47,021 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-09-01 00:23:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 170 flow [2023-09-01 00:23:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 00:23:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:23:47,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:23:47,228 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 00:23:47,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:47,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 27360727, now seen corresponding path program 1 times [2023-09-01 00:23:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:47,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525330668] [2023-09-01 00:23:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:47,230 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 00:23:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:47,231 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 00:23:47,233 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 00:23:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 00:23:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:23:48,943 INFO L321 Elim1Store]: treesize reduction 372, result has 28.0 percent of original size [2023-09-01 00:23:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 1022 treesize of output 857 [2023-09-01 00:23:49,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-09-01 00:23:49,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:23:49,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-09-01 00:23:49,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:23:49,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:23:51,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:23:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:54,168 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2023-09-01 00:23:54,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 113 [2023-09-01 00:23:54,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-09-01 00:23:54,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-09-01 00:23:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:54,319 INFO L321 Elim1Store]: treesize reduction 191, result has 11.6 percent of original size [2023-09-01 00:23:54,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1313 treesize of output 1655 [2023-09-01 00:23:54,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 635 treesize of output 629 [2023-09-01 00:23:54,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 629 treesize of output 623 [2023-09-01 00:23:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 287 [2023-09-01 00:23:54,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 287 [2023-09-01 00:23:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,899 INFO L321 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-09-01 00:23:54,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 307 [2023-09-01 00:23:54,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 00:23:54,956 INFO L321 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-09-01 00:23:54,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 307 [2023-09-01 00:23:55,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-09-01 00:23:55,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-09-01 00:23:55,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 190 treesize of output 19 [2023-09-01 00:23:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:23:55,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 212 treesize of output 114 [2023-09-01 00:23:55,592 INFO L321 Elim1Store]: treesize reduction 67, result has 1.5 percent of original size [2023-09-01 00:23:55,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 217 treesize of output 24 [2023-09-01 00:23:55,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2023-09-01 00:23:55,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:23:56,075 INFO L321 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2023-09-01 00:23:56,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 66 [2023-09-01 00:23:56,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2023-09-01 00:23:56,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-09-01 00:23:56,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:23:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:23:56,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:23:56,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:23:56,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525330668] [2023-09-01 00:23:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525330668] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:23:56,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:23:56,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:23:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962445857] [2023-09-01 00:23:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:23:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:23:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:23:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:23:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:23:56,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 570 [2023-09-01 00:23:56,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 00:23:56,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:23:56,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 570 [2023-09-01 00:23:56,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:23:57,901 INFO L130 PetriNetUnfolder]: 1490/2315 cut-off events. [2023-09-01 00:23:57,902 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-09-01 00:23:57,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5110 conditions, 2315 events. 1490/2315 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10766 event pairs, 1257 based on Foata normal form. 0/1171 useless extension candidates. Maximal degree in co-relation 5103. Up to 2304 conditions per place. [2023-09-01 00:23:57,910 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 49 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-09-01 00:23:57,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 272 flow [2023-09-01 00:23:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:23:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:23:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 948 transitions. [2023-09-01 00:23:57,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2023-09-01 00:23:57,913 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 948 transitions. [2023-09-01 00:23:57,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 948 transitions. [2023-09-01 00:23:57,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:23:57,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 948 transitions. [2023-09-01 00:23:57,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 00:23:57,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:23:57,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:23:57,919 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 170 flow. Second operand 4 states and 948 transitions. [2023-09-01 00:23:57,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 272 flow [2023-09-01 00:23:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:23:57,923 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 170 flow [2023-09-01 00:23:57,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-09-01 00:23:57,925 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-09-01 00:23:57,925 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 170 flow [2023-09-01 00:23:57,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 00:23:57,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:23:57,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:23:57,938 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 00:23:58,136 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 00:23:58,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:23:58,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:23:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash 27360737, now seen corresponding path program 1 times [2023-09-01 00:23:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:23:58,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899375731] [2023-09-01 00:23:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:23:58,137 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 00:23:58,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:23:58,138 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 00:23:58,138 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 00:23:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:23:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 00:23:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:00,139 INFO L321 Elim1Store]: treesize reduction 188, result has 31.1 percent of original size [2023-09-01 00:24:00,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1022 treesize of output 797 [2023-09-01 00:24:03,698 INFO L321 Elim1Store]: treesize reduction 188, result has 31.1 percent of original size [2023-09-01 00:24:03,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1022 treesize of output 797 [2023-09-01 00:24:03,773 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 271 [2023-09-01 00:24:03,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-09-01 00:24:04,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:24:04,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2023-09-01 00:24:04,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-09-01 00:24:04,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-09-01 00:24:04,862 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 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:24:05,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-09-01 00:24:05,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-09-01 00:24:05,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-09-01 00:24:07,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:07,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:09,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:24:09,513 INFO L321 Elim1Store]: treesize reduction 113, result has 13.7 percent of original size [2023-09-01 00:24:09,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 844 treesize of output 853 [2023-09-01 00:24:09,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 521 treesize of output 515 [2023-09-01 00:24:09,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 515 treesize of output 509 [2023-09-01 00:24:09,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:09,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:10,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:10,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 246 treesize of output 23 [2023-09-01 00:24:10,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:10,709 INFO L321 Elim1Store]: treesize reduction 92, result has 14.8 percent of original size [2023-09-01 00:24:10,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 523 treesize of output 462 [2023-09-01 00:24:10,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 144 [2023-09-01 00:24:10,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 138 [2023-09-01 00:24:10,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-09-01 00:24:10,847 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-09-01 00:24:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:24:10,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 250 treesize of output 210 [2023-09-01 00:24:10,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 194 [2023-09-01 00:24:10,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 00:24:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:11,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:24:11,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:11,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899375731] [2023-09-01 00:24:11,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899375731] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:24:11,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:24:11,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:24:11,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492525858] [2023-09-01 00:24:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:24:11,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:24:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:24:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:24:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 570 [2023-09-01 00:24:12,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 00:24:12,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:12,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 570 [2023-09-01 00:24:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:14,193 INFO L130 PetriNetUnfolder]: 1491/2317 cut-off events. [2023-09-01 00:24:14,193 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 00:24:14,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4954 conditions, 2317 events. 1491/2317 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10752 event pairs, 1257 based on Foata normal form. 0/1174 useless extension candidates. Maximal degree in co-relation 4947. Up to 2313 conditions per place. [2023-09-01 00:24:14,205 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 52 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-09-01 00:24:14,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 300 flow [2023-09-01 00:24:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:24:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:24:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 923 transitions. [2023-09-01 00:24:14,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482456140350875 [2023-09-01 00:24:14,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 923 transitions. [2023-09-01 00:24:14,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 923 transitions. [2023-09-01 00:24:14,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:14,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 923 transitions. [2023-09-01 00:24:14,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 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 00:24:14,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:24:14,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:24:14,214 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 170 flow. Second operand 4 states and 923 transitions. [2023-09-01 00:24:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 300 flow [2023-09-01 00:24:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 00:24:14,216 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 201 flow [2023-09-01 00:24:14,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-09-01 00:24:14,219 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2023-09-01 00:24:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 201 flow [2023-09-01 00:24:14,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 00:24:14,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:14,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 00:24:14,232 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 00:24:14,429 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 00:24:14,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:14,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 882583, now seen corresponding path program 1 times [2023-09-01 00:24:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933285936] [2023-09-01 00:24:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:24:14,430 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 00:24:14,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:14,430 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 00:24:14,431 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 00:24:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:24:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 00:24:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:14,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-09-01 00:24:14,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-09-01 00:24:14,616 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 00:24:14,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:24:14,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933285936] [2023-09-01 00:24:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933285936] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:24:14,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:24:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:24:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620449627] [2023-09-01 00:24:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:24:14,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:24:14,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:24:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:24:15,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 570 [2023-09-01 00:24:15,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 00:24:15,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:15,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 570 [2023-09-01 00:24:15,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:16,892 INFO L130 PetriNetUnfolder]: 1491/2316 cut-off events. [2023-09-01 00:24:16,893 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-09-01 00:24:16,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2316 events. 1491/2316 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10765 event pairs, 1257 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 4954. Up to 2312 conditions per place. [2023-09-01 00:24:16,903 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 55 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-09-01 00:24:16,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 333 flow [2023-09-01 00:24:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:24:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:24:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 950 transitions. [2023-09-01 00:24:16,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-09-01 00:24:16,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 950 transitions. [2023-09-01 00:24:16,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 950 transitions. [2023-09-01 00:24:16,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:16,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 950 transitions. [2023-09-01 00:24:16,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.5) internal successors, (950), 4 states have internal predecessors, (950), 0 states have call successors, (0), 0 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 00:24:16,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:24:16,911 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 0 states have call successors, (0), 0 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 00:24:16,911 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 201 flow. Second operand 4 states and 950 transitions. [2023-09-01 00:24:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 333 flow [2023-09-01 00:24:16,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 322 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 00:24:16,916 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 208 flow [2023-09-01 00:24:16,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-09-01 00:24:16,917 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-09-01 00:24:16,917 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 208 flow [2023-09-01 00:24:16,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.75) internal successors, (895), 4 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 00:24:16,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:16,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:24:16,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-09-01 00:24:17,126 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 00:24:17,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:17,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 27360733, now seen corresponding path program 1 times [2023-09-01 00:24:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434020063] [2023-09-01 00:24:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:24:17,127 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 00:24:17,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:17,128 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 00:24:17,128 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 00:24:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:24:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 00:24:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:17,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:24:17,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434020063] [2023-09-01 00:24:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434020063] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:24:17,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:24:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:24:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187088805] [2023-09-01 00:24:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:24:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:24:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:24:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:24:17,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 570 [2023-09-01 00:24:17,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 00:24:17,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:17,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 570 [2023-09-01 00:24:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:19,318 INFO L130 PetriNetUnfolder]: 1491/2315 cut-off events. [2023-09-01 00:24:19,318 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-09-01 00:24:19,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2315 events. 1491/2315 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10741 event pairs, 1257 based on Foata normal form. 1/1176 useless extension candidates. Maximal degree in co-relation 4953. Up to 2312 conditions per place. [2023-09-01 00:24:19,327 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-09-01 00:24:19,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 330 flow [2023-09-01 00:24:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:24:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:24:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-09-01 00:24:19,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43567251461988304 [2023-09-01 00:24:19,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-09-01 00:24:19,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-09-01 00:24:19,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:19,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-09-01 00:24:19,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:24:19,333 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 00:24:19,334 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 00:24:19,334 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 208 flow. Second operand 3 states and 745 transitions. [2023-09-01 00:24:19,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 330 flow [2023-09-01 00:24:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 00:24:19,336 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 208 flow [2023-09-01 00:24:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-09-01 00:24:19,338 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-09-01 00:24:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 208 flow [2023-09-01 00:24:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 00:24:19,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:19,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:24:19,351 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 00:24:19,548 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 00:24:19,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:19,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 27357391, now seen corresponding path program 1 times [2023-09-01 00:24:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:19,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314308602] [2023-09-01 00:24:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:24:19,550 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 00:24:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:19,551 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 00:24:19,552 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 00:24:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:24:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 00:24:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:19,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:24:19,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314308602] [2023-09-01 00:24:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314308602] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:24:19,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:24:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:24:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930878584] [2023-09-01 00:24:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:24:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:24:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:24:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:24:19,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 570 [2023-09-01 00:24:19,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 00:24:19,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:19,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 570 [2023-09-01 00:24:19,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:20,529 INFO L130 PetriNetUnfolder]: 1488/2313 cut-off events. [2023-09-01 00:24:20,529 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 00:24:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2313 events. 1488/2313 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10749 event pairs, 1257 based on Foata normal form. 2/1175 useless extension candidates. Maximal degree in co-relation 4944. Up to 2310 conditions per place. [2023-09-01 00:24:20,535 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 52 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-09-01 00:24:20,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 306 flow [2023-09-01 00:24:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:24:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:24:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-09-01 00:24:20,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2023-09-01 00:24:20,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-09-01 00:24:20,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-09-01 00:24:20,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:20,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-09-01 00:24:20,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 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 00:24:20,544 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 00:24:20,544 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 00:24:20,544 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 208 flow. Second operand 3 states and 774 transitions. [2023-09-01 00:24:20,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 306 flow [2023-09-01 00:24:20,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 56 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:24:20,546 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 198 flow [2023-09-01 00:24:20,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-09-01 00:24:20,547 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2023-09-01 00:24:20,547 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 198 flow [2023-09-01 00:24:20,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 00:24:20,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:20,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 00:24:20,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 00:24:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 00:24:20,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:20,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 848180165, now seen corresponding path program 1 times [2023-09-01 00:24:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:20,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532046933] [2023-09-01 00:24:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:24:20,760 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 00:24:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:20,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 00:24:20,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 00:24:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:24:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:24:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:20,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:24:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:20,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532046933] [2023-09-01 00:24:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532046933] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:24:20,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 00:24:20,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 00:24:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322423097] [2023-09-01 00:24:20,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 00:24:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 00:24:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 00:24:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 00:24:20,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-09-01 00:24:20,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 240.33333333333334) internal successors, (1442), 6 states have internal predecessors, (1442), 0 states have call successors, (0), 0 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 00:24:20,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:20,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-09-01 00:24:20,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:23,420 INFO L130 PetriNetUnfolder]: 1489/2322 cut-off events. [2023-09-01 00:24:23,421 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-09-01 00:24:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 2322 events. 1489/2322 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10797 event pairs, 1257 based on Foata normal form. 6/1188 useless extension candidates. Maximal degree in co-relation 4979. Up to 2309 conditions per place. [2023-09-01 00:24:23,427 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 54 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-09-01 00:24:23,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 358 flow [2023-09-01 00:24:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:24:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:24:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1496 transitions. [2023-09-01 00:24:23,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43742690058479533 [2023-09-01 00:24:23,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1496 transitions. [2023-09-01 00:24:23,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1496 transitions. [2023-09-01 00:24:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1496 transitions. [2023-09-01 00:24:23,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 00:24:23,438 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 00:24:23,439 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 00:24:23,439 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 198 flow. Second operand 6 states and 1496 transitions. [2023-09-01 00:24:23,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 358 flow [2023-09-01 00:24:23,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:24:23,441 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 251 flow [2023-09-01 00:24:23,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-09-01 00:24:23,442 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-09-01 00:24:23,442 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 251 flow [2023-09-01 00:24:23,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 240.33333333333334) internal successors, (1442), 6 states have internal predecessors, (1442), 0 states have call successors, (0), 0 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 00:24:23,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:23,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 00:24:23,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 00:24:23,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 00:24:23,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:23,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash 943029839, now seen corresponding path program 2 times [2023-09-01 00:24:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:23,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926960893] [2023-09-01 00:24:23,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:24:23,653 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 00:24:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:23,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 00:24:23,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 00:24:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:24:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:24:24,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:24:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:24:24,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:24:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:24:24,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:24,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926960893] [2023-09-01 00:24:24,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926960893] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:24:24,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 00:24:24,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 00:24:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416914686] [2023-09-01 00:24:24,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 00:24:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 00:24:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 00:24:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 00:24:24,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-09-01 00:24:24,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 00:24:24,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:24,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-09-01 00:24:24,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:28,096 INFO L130 PetriNetUnfolder]: 1495/2355 cut-off events. [2023-09-01 00:24:28,096 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-09-01 00:24:28,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 2355 events. 1495/2355 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10753 event pairs, 1257 based on Foata normal form. 3/1213 useless extension candidates. Maximal degree in co-relation 5159. Up to 2301 conditions per place. [2023-09-01 00:24:28,106 INFO L137 encePairwiseOnDemand]: 560/570 looper letters, 85 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-09-01 00:24:28,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 687 flow [2023-09-01 00:24:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:24:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:24:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1520 transitions. [2023-09-01 00:24:28,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 00:24:28,109 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1520 transitions. [2023-09-01 00:24:28,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1520 transitions. [2023-09-01 00:24:28,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:28,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1520 transitions. [2023-09-01 00:24:28,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.33333333333334) internal successors, (1520), 6 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 00:24:28,115 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 00:24:28,124 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 00:24:28,125 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 251 flow. Second operand 6 states and 1520 transitions. [2023-09-01 00:24:28,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 687 flow [2023-09-01 00:24:28,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:24:28,127 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 354 flow [2023-09-01 00:24:28,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2023-09-01 00:24:28,127 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2023-09-01 00:24:28,127 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 354 flow [2023-09-01 00:24:28,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 00:24:28,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:28,129 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 00:24:28,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 00:24:28,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 00:24:28,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:28,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 943029749, now seen corresponding path program 1 times [2023-09-01 00:24:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:28,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737473667] [2023-09-01 00:24:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:24:28,344 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 00:24:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:28,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 00:24:28,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 00:24:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:24:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:24:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:28,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:24:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:28,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737473667] [2023-09-01 00:24:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737473667] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:24:28,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 00:24:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 00:24:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782568838] [2023-09-01 00:24:28,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 00:24:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 00:24:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 00:24:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 00:24:29,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-09-01 00:24:29,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 240.16666666666666) internal successors, (2882), 12 states have internal predecessors, (2882), 0 states have call successors, (0), 0 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 00:24:29,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:29,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-09-01 00:24:29,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:35,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:24:36,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:24:37,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:24:44,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:24:49,268 INFO L130 PetriNetUnfolder]: 1495/2397 cut-off events. [2023-09-01 00:24:49,268 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2023-09-01 00:24:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2397 events. 1495/2397 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10816 event pairs, 1257 based on Foata normal form. 24/1276 useless extension candidates. Maximal degree in co-relation 5397. Up to 2321 conditions per place. [2023-09-01 00:24:49,275 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 64 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2023-09-01 00:24:49,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 79 transitions, 632 flow [2023-09-01 00:24:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:24:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:24:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2945 transitions. [2023-09-01 00:24:49,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-09-01 00:24:49,281 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2945 transitions. [2023-09-01 00:24:49,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2945 transitions. [2023-09-01 00:24:49,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:24:49,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2945 transitions. [2023-09-01 00:24:49,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 245.41666666666666) internal successors, (2945), 12 states have internal predecessors, (2945), 0 states have call successors, (0), 0 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 00:24:49,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 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 00:24:49,292 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 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 00:24:49,292 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 354 flow. Second operand 12 states and 2945 transitions. [2023-09-01 00:24:49,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 79 transitions, 632 flow [2023-09-01 00:24:49,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 79 transitions, 618 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:24:49,295 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 487 flow [2023-09-01 00:24:49,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=487, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2023-09-01 00:24:49,295 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 24 predicate places. [2023-09-01 00:24:49,295 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 487 flow [2023-09-01 00:24:49,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 240.16666666666666) internal successors, (2882), 12 states have internal predecessors, (2882), 0 states have call successors, (0), 0 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 00:24:49,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:24:49,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 00:24:49,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 00:24:49,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 00:24:49,510 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:24:49,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:24:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 481585717, now seen corresponding path program 2 times [2023-09-01 00:24:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:24:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765135679] [2023-09-01 00:24:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:24:49,511 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 00:24:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:24:49,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 00:24:49,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 00:24:51,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:24:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:24:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 00:24:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:24:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:24:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:24:51,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:24:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765135679] [2023-09-01 00:24:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765135679] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:24:51,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 00:24:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-09-01 00:24:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256223299] [2023-09-01 00:24:51,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 00:24:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 00:24:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:24:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 00:24:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 00:24:52,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-09-01 00:24:52,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 487 flow. Second operand has 24 states, 24 states have (on average 240.08333333333334) internal successors, (5762), 24 states have internal predecessors, (5762), 0 states have call successors, (0), 0 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 00:24:52,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:24:52,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-09-01 00:24:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:24:54,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:02,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:05,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:06,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:08,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:09,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:15,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:18,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:19,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:20,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:25,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:26,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:29,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:31,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:40,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:48,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:50,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:54,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:25:56,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:26:07,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:26:09,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:26:13,930 WARN L539 Checker$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 00:26:15,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:26:29,338 INFO L130 PetriNetUnfolder]: 1495/2481 cut-off events. [2023-09-01 00:26:29,339 INFO L131 PetriNetUnfolder]: For 3833/3833 co-relation queries the response was YES. [2023-09-01 00:26:29,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 2481 events. 1495/2481 cut-off events. For 3833/3833 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10929 event pairs, 1257 based on Foata normal form. 48/1384 useless extension candidates. Maximal degree in co-relation 6044. Up to 2321 conditions per place. [2023-09-01 00:26:29,348 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 76 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2023-09-01 00:26:29,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 103 transitions, 1052 flow [2023-09-01 00:26:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 00:26:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 00:26:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5843 transitions. [2023-09-01 00:26:29,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271198830409357 [2023-09-01 00:26:29,358 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5843 transitions. [2023-09-01 00:26:29,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5843 transitions. [2023-09-01 00:26:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:26:29,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5843 transitions. [2023-09-01 00:26:29,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 243.45833333333334) internal successors, (5843), 24 states have internal predecessors, (5843), 0 states have call successors, (0), 0 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 00:26:29,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 570.0) internal successors, (14250), 25 states have internal predecessors, (14250), 0 states have call successors, (0), 0 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 00:26:29,422 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 570.0) internal successors, (14250), 25 states have internal predecessors, (14250), 0 states have call successors, (0), 0 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 00:26:29,422 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 487 flow. Second operand 24 states and 5843 transitions. [2023-09-01 00:26:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 103 transitions, 1052 flow [2023-09-01 00:26:29,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 103 transitions, 995 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-09-01 00:26:29,442 INFO L231 Difference]: Finished difference. Result has 128 places, 85 transitions, 741 flow [2023-09-01 00:26:29,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=741, PETRI_PLACES=128, PETRI_TRANSITIONS=85} [2023-09-01 00:26:29,443 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 56 predicate places. [2023-09-01 00:26:29,443 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 85 transitions, 741 flow [2023-09-01 00:26:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 240.08333333333334) internal successors, (5762), 24 states have internal predecessors, (5762), 0 states have call successors, (0), 0 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 00:26:29,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:29,444 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-09-01 00:26:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 00:26:29,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 00:26:29,656 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 00:26:29,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 622834357, now seen corresponding path program 3 times [2023-09-01 00:26:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 00:26:29,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079006879] [2023-09-01 00:26:29,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 00:26:29,658 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 00:26:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 00:26:29,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 00:26:29,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 00:27:02,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-09-01 00:27:02,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:27:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 3643 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 00:27:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:27:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:27:03,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:27:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:27:04,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 00:27:04,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079006879] [2023-09-01 00:27:04,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079006879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:27:04,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 00:27:04,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-09-01 00:27:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567216412] [2023-09-01 00:27:04,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 00:27:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 00:27:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 00:27:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 00:27:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 00:27:05,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 570 [2023-09-01 00:27:06,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 85 transitions, 741 flow. Second operand has 48 states, 48 states have (on average 240.04166666666666) internal successors, (11522), 48 states have internal predecessors, (11522), 0 states have call successors, (0), 0 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 00:27:06,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:27:06,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 570 [2023-09-01 00:27:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:27:10,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:16,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:18,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:21,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:22,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:23,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:29,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:32,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:38,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:43,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:44,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:48,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:50,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:27:54,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:00,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:02,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:05,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:09,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:11,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:12,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:14,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:15,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:19,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:24,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:25,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:30,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:33,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:36,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:37,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:41,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:43,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:47,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:48,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:52,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:55,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:57,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:28:59,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:03,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:05,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:13,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:14,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:18,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:19,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:22,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:24,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:30,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 00:29:32,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15