./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:43:48,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:43:48,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:43:48,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:43:48,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:43:48,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:43:48,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:43:48,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:43:48,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:43:48,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:43:48,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:43:48,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:43:48,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:43:48,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:43:48,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:43:48,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:43:48,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:43:48,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:43:48,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:43:48,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:43:48,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:43:48,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:43:48,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:43:48,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:43:48,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:43:48,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:43:48,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:43:48,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:43:48,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:43:48,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:43:48,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:43:48,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:43:48,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:43:48,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:43:48,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:43:48,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:43:48,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:43:48,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:43:48,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:43:48,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:43:48,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:43:48,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:43:48,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:43:48,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:43:48,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:43:48,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:43:48,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:43:48,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:43:48,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:43:48,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:43:48,254 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:43:48,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:43:48,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:43:48,255 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:43:48,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:43:48,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:43:48,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:43:48,256 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:43:48,256 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:43:48,256 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:43:48,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:43:48,257 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:43:48,257 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:43:48,257 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:43:48,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:43:48,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:43:48,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:43:48,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:48,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:43:48,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:43:48,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:43:48,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:43:48,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:43:48,260 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:43:48,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:43:48,260 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:43:48,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:43:48,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:43:48,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:43:48,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:43:48,580 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:43:48,581 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:43:48,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 06:43:49,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:43:49,781 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:43:49,782 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 06:43:49,799 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc8e76a4d/85c51b34b6b74138a632c5a6f4ad74d2/FLAG4d647b63e [2023-08-30 06:43:49,829 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc8e76a4d/85c51b34b6b74138a632c5a6f4ad74d2 [2023-08-30 06:43:49,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:43:49,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:43:49,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:49,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:43:49,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:43:49,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:49" (1/1) ... [2023-08-30 06:43:49,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f73123c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:49, skipping insertion in model container [2023-08-30 06:43:49,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:49" (1/1) ... [2023-08-30 06:43:49,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:43:49,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:50,035 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 06:43:50,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:50,060 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:43:50,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52a72bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:50, skipping insertion in model container [2023-08-30 06:43:50,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:50,063 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:43:50,064 INFO L158 Benchmark]: Toolchain (without parser) took 230.96ms. Allocated memory is still 94.4MB. Free memory was 71.3MB in the beginning and 61.7MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:43:50,065 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:43:50,065 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.29ms. Allocated memory is still 94.4MB. Free memory was 71.1MB in the beginning and 61.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:43:50,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.29ms. Allocated memory is still 94.4MB. Free memory was 71.1MB in the beginning and 61.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:43:51,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:43:51,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:43:51,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:43:51,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:43:51,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:43:51,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:43:51,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:43:51,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:43:51,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:43:51,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:43:51,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:43:51,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:43:51,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:43:51,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:43:51,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:43:51,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:43:51,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:43:51,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:43:51,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:43:51,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:43:51,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:43:51,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:43:51,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:43:51,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:43:51,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:43:51,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:43:51,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:43:51,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:43:51,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:43:51,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:43:51,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:43:51,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:43:51,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:43:51,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:43:51,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:43:51,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:43:51,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:43:51,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:43:51,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:43:51,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:43:51,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:43:51,743 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:43:51,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:43:51,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:43:51,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:43:51,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:43:51,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:43:51,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:43:51,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:43:51,746 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:43:51,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:43:51,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:43:51,747 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:43:51,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:43:51,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:43:51,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:43:51,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:43:51,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:51,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:43:51,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:43:51,749 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:43:51,750 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:43:51,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:43:51,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:43:52,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:43:52,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:43:52,014 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:43:52,015 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:43:52,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 06:43:53,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:43:53,428 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:43:53,429 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 06:43:53,434 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153fd1e0c/a858fe16095140f78d0ca80500750c9b/FLAG600e6ca22 [2023-08-30 06:43:53,831 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153fd1e0c/a858fe16095140f78d0ca80500750c9b [2023-08-30 06:43:53,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:43:53,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:43:53,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:53,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:43:53,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:43:53,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:53" (1/1) ... [2023-08-30 06:43:53,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626ea042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:53, skipping insertion in model container [2023-08-30 06:43:53,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:43:53" (1/1) ... [2023-08-30 06:43:53,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:43:53,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:54,027 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 06:43:54,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:54,051 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:43:54,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:43:54,082 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 06:43:54,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:54,095 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:43:54,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 06:43:54,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:43:54,143 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:43:54,143 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:43:54,148 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:43:54,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54 WrapperNode [2023-08-30 06:43:54,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:43:54,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:43:54,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:43:54,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:43:54,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,194 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2023-08-30 06:43:54,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:43:54,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:43:54,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:43:54,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:43:54,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:43:54,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:43:54,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:43:54,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:43:54,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (1/1) ... [2023-08-30 06:43:54,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:43:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:43:54,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:43:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:43:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:43:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:43:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:43:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:43:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:43:54,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:43:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:43:54,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:43:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:43:54,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:43:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:43:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:43:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:43:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:43:54,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:43:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:43:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:43:54,283 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:43:54,352 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:43:54,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:43:54,724 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:43:54,811 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:43:54,811 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:43:54,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:43:54 BoogieIcfgContainer [2023-08-30 06:43:54,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:43:54,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:43:54,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:43:54,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:43:54,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:43:53" (1/3) ... [2023-08-30 06:43:54,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3300d4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:43:54, skipping insertion in model container [2023-08-30 06:43:54,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:43:54" (2/3) ... [2023-08-30 06:43:54,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3300d4b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:43:54, skipping insertion in model container [2023-08-30 06:43:54,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:43:54" (3/3) ... [2023-08-30 06:43:54,823 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-08-30 06:43:54,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:43:54,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:43:54,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:43:54,901 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:43:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 171 transitions, 366 flow [2023-08-30 06:43:54,981 INFO L130 PetriNetUnfolder]: 12/168 cut-off events. [2023-08-30 06:43:54,982 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:43:54,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 12/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 06:43:54,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 171 transitions, 366 flow [2023-08-30 06:43:54,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 164 transitions, 346 flow [2023-08-30 06:43:54,994 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:43:55,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 164 transitions, 346 flow [2023-08-30 06:43:55,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 164 transitions, 346 flow [2023-08-30 06:43:55,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 164 transitions, 346 flow [2023-08-30 06:43:55,031 INFO L130 PetriNetUnfolder]: 12/164 cut-off events. [2023-08-30 06:43:55,031 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:43:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 164 events. 12/164 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-30 06:43:55,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 06:44:12,644 INFO L134 LiptonReduction]: Checked pairs total: 3510 [2023-08-30 06:44:12,645 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 06:44:12,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:44:12,657 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;@13f1f669, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:44:12,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 06:44:12,660 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:44:12,660 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:44:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:12,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:12,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 22196, now seen corresponding path program 1 times [2023-08-30 06:44:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:12,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248422126] [2023-08-30 06:44:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:12,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:12,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:44:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:12,954 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:12,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:12,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:12,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248422126] [2023-08-30 06:44:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248422126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:12,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:12,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911801014] [2023-08-30 06:44:12,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:13,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:13,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:44:13,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:13,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:13,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:44:13,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:14,036 INFO L130 PetriNetUnfolder]: 5471/6966 cut-off events. [2023-08-30 06:44:14,036 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 06:44:14,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 6966 events. 5471/6966 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 31453 event pairs, 2601 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 6096. Up to 3485 conditions per place. [2023-08-30 06:44:14,130 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 06:44:14,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-30 06:44:14,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155155155155156 [2023-08-30 06:44:14,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-30 06:44:14,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-30 06:44:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:14,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-30 06:44:14,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:14,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:14,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:14,161 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 515 transitions. [2023-08-30 06:44:14,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:14,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:44:14,169 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:14,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 06:44:14,173 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 06:44:14,174 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:14,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:14,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:14,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:14,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:14,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:14,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:14,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash 22269, now seen corresponding path program 1 times [2023-08-30 06:44:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:14,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644351507] [2023-08-30 06:44:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:14,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:14,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:44:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:44:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:14,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:14,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644351507] [2023-08-30 06:44:14,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644351507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:14,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:14,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698129100] [2023-08-30 06:44:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:14,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:14,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 06:44:14,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:14,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:14,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 06:44:14,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:14,993 INFO L130 PetriNetUnfolder]: 2765/3515 cut-off events. [2023-08-30 06:44:14,993 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:14,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 3515 events. 2765/3515 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14407 event pairs, 1310 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 7031. Up to 3488 conditions per place. [2023-08-30 06:44:15,012 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 06:44:15,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-30 06:44:15,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724724724724725 [2023-08-30 06:44:15,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-30 06:44:15,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-30 06:44:15,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:15,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-30 06:44:15,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,020 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 472 transitions. [2023-08-30 06:44:15,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:15,022 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 06:44:15,023 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-08-30 06:44:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:15,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:15,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:15,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:15,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash 22195, now seen corresponding path program 1 times [2023-08-30 06:44:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:15,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600970013] [2023-08-30 06:44:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:15,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:15,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:15,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:15,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:44:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:44:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:15,334 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:44:15,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:44:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:15,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:15,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:15,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600970013] [2023-08-30 06:44:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600970013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:15,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320119352] [2023-08-30 06:44:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:15,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:15,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:44:15,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:15,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:44:15,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:15,749 INFO L130 PetriNetUnfolder]: 2765/3513 cut-off events. [2023-08-30 06:44:15,749 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:15,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 3513 events. 2765/3513 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14336 event pairs, 1310 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 7032. Up to 3487 conditions per place. [2023-08-30 06:44:15,774 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:44:15,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 06:44:15,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 06:44:15,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 06:44:15,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 06:44:15,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:15,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 06:44:15,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,782 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 461 transitions. [2023-08-30 06:44:15,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:15,787 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:15,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 06:44:15,789 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 06:44:15,789 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:15,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:15,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:15,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:16,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:16,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:16,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 690463, now seen corresponding path program 1 times [2023-08-30 06:44:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:16,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376527938] [2023-08-30 06:44:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:16,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:16,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:16,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:44:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:44:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:16,146 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:16,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:16,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:16,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376527938] [2023-08-30 06:44:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376527938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:16,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:16,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:44:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385405455] [2023-08-30 06:44:16,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:44:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:16,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:44:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:44:17,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 06:44:17,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:17,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:17,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 06:44:17,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:17,858 INFO L130 PetriNetUnfolder]: 5477/6973 cut-off events. [2023-08-30 06:44:17,858 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:44:17,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 6973 events. 5477/6973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31535 event pairs, 2601 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 13967. Up to 3484 conditions per place. [2023-08-30 06:44:17,882 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-30 06:44:17,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2023-08-30 06:44:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:44:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:44:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 900 transitions. [2023-08-30 06:44:17,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-08-30 06:44:17,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 900 transitions. [2023-08-30 06:44:17,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 900 transitions. [2023-08-30 06:44:17,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:17,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 900 transitions. [2023-08-30 06:44:17,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.0) internal successors, (900), 6 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) [2023-08-30 06:44:17,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:17,891 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:17,891 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 900 transitions. [2023-08-30 06:44:17,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2023-08-30 06:44:17,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:17,894 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2023-08-30 06:44:17,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 06:44:17,895 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-30 06:44:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2023-08-30 06:44:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:17,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:17,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:17,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:18,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:18,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 690536, now seen corresponding path program 1 times [2023-08-30 06:44:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527074672] [2023-08-30 06:44:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:18,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:18,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:18,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:44:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:18,247 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:44:18,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 06:44:18,265 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:44:18,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:44:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:18,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:18,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527074672] [2023-08-30 06:44:18,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527074672] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:44:18,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:44:18,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 06:44:18,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006353053] [2023-08-30 06:44:18,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:18,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:44:18,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:44:18,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:18,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:18,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:44:18,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:19,242 INFO L130 PetriNetUnfolder]: 4373/5617 cut-off events. [2023-08-30 06:44:19,242 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 06:44:19,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 5617 events. 4373/5617 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 25200 event pairs, 2060 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 11283. Up to 5565 conditions per place. [2023-08-30 06:44:19,267 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 06:44:19,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 273 flow [2023-08-30 06:44:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-30 06:44:19,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364364364364364 [2023-08-30 06:44:19,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-30 06:44:19,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-30 06:44:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:19,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-30 06:44:19,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:19,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:19,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:19,273 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 3 states and 436 transitions. [2023-08-30 06:44:19,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 273 flow [2023-08-30 06:44:19,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 255 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:19,278 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 165 flow [2023-08-30 06:44:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 06:44:19,280 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 06:44:19,280 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 165 flow [2023-08-30 06:44:19,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:19,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:19,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:19,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:19,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:19,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash 690535, now seen corresponding path program 1 times [2023-08-30 06:44:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:19,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313897882] [2023-08-30 06:44:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:19,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:19,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:19,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:44:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:19,630 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 06:44:19,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 06:44:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:19,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:19,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:19,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313897882] [2023-08-30 06:44:19,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313897882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:19,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:19,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816508552] [2023-08-30 06:44:19,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:19,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:19,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:19,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:19,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:44:19,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:19,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:19,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:44:19,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:20,224 INFO L130 PetriNetUnfolder]: 3211/4203 cut-off events. [2023-08-30 06:44:20,224 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:20,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 4203 events. 3211/4203 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 18852 event pairs, 1500 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 8437. Up to 4151 conditions per place. [2023-08-30 06:44:20,241 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 06:44:20,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 227 flow [2023-08-30 06:44:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 06:44:20,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 06:44:20,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 06:44:20,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 06:44:20,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:20,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 06:44:20,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,246 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 165 flow. Second operand 3 states and 458 transitions. [2023-08-30 06:44:20,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 227 flow [2023-08-30 06:44:20,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:20,247 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2023-08-30 06:44:20,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 06:44:20,248 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 06:44:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2023-08-30 06:44:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:20,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:20,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:44:20,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:20,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:20,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 663622091, now seen corresponding path program 1 times [2023-08-30 06:44:20,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:20,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842510904] [2023-08-30 06:44:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:20,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:20,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:44:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:20,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:20,603 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-08-30 06:44:20,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 17 treesize of output 41 [2023-08-30 06:44:20,614 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 26 treesize of output 24 [2023-08-30 06:44:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:20,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:20,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842510904] [2023-08-30 06:44:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842510904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:20,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:44:20,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921681032] [2023-08-30 06:44:20,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:44:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:44:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:44:21,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:44:21,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:21,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:21,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:44:21,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:21,918 INFO L130 PetriNetUnfolder]: 2989/3921 cut-off events. [2023-08-30 06:44:21,918 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:21,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3921 events. 2989/3921 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 17505 event pairs, 1405 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 7868. Up to 1955 conditions per place. [2023-08-30 06:44:21,934 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 68 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-30 06:44:21,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 356 flow [2023-08-30 06:44:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:44:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:44:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-30 06:44:21,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436036036036036 [2023-08-30 06:44:21,936 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-30 06:44:21,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-30 06:44:21,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:21,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-30 06:44:21,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:21,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:21,940 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:21,940 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 5 states and 726 transitions. [2023-08-30 06:44:21,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 356 flow [2023-08-30 06:44:21,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:21,942 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 145 flow [2023-08-30 06:44:21,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-30 06:44:21,942 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 06:44:21,942 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 145 flow [2023-08-30 06:44:21,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:21,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:21,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:44:21,950 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 [2023-08-30 06:44:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:22,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:22,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash 663622090, now seen corresponding path program 1 times [2023-08-30 06:44:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668068131] [2023-08-30 06:44:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:22,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:22,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:22,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:44:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:44:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:22,260 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:44:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 06:44:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:22,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:22,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:22,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668068131] [2023-08-30 06:44:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668068131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:22,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146605827] [2023-08-30 06:44:22,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:22,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 06:44:22,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:22,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 06:44:22,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:22,686 INFO L130 PetriNetUnfolder]: 2863/3735 cut-off events. [2023-08-30 06:44:22,687 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:44:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 3735 events. 2863/3735 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 16307 event pairs, 1328 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 7503. Up to 3683 conditions per place. [2023-08-30 06:44:22,700 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 06:44:22,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 217 flow [2023-08-30 06:44:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-30 06:44:22,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544544544544545 [2023-08-30 06:44:22,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-30 06:44:22,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-30 06:44:22,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:22,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-30 06:44:22,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,705 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 145 flow. Second operand 3 states and 454 transitions. [2023-08-30 06:44:22,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 217 flow [2023-08-30 06:44:22,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:22,706 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 138 flow [2023-08-30 06:44:22,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-30 06:44:22,707 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-08-30 06:44:22,707 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 138 flow [2023-08-30 06:44:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:22,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:22,707 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:44:22,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:22,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:22,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -902882956, now seen corresponding path program 2 times [2023-08-30 06:44:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376618372] [2023-08-30 06:44:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:44:22,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:22,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:22,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:22,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:44:22,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:44:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:44:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:44:22,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:23,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:23,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:23,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:23,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:23,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376618372] [2023-08-30 06:44:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376618372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:23,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:23,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:44:23,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742555442] [2023-08-30 06:44:23,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:23,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:44:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:44:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:44:26,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:44:26,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 138 flow. Second operand has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:26,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:26,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:44:26,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:29,964 INFO L130 PetriNetUnfolder]: 12488/16397 cut-off events. [2023-08-30 06:44:29,964 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 06:44:29,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32862 conditions, 16397 events. 12488/16397 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 85771 event pairs, 5904 based on Foata normal form. 6/5649 useless extension candidates. Maximal degree in co-relation 32845. Up to 1838 conditions per place. [2023-08-30 06:44:30,022 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 263 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2023-08-30 06:44:30,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 278 transitions, 1264 flow [2023-08-30 06:44:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:44:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:44:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1913 transitions. [2023-08-30 06:44:30,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47872872872872874 [2023-08-30 06:44:30,027 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1913 transitions. [2023-08-30 06:44:30,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1913 transitions. [2023-08-30 06:44:30,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:30,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1913 transitions. [2023-08-30 06:44:30,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:30,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:30,035 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:30,035 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 138 flow. Second operand 12 states and 1913 transitions. [2023-08-30 06:44:30,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 278 transitions, 1264 flow [2023-08-30 06:44:30,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 278 transitions, 1263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:30,038 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-30 06:44:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-30 06:44:30,039 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-30 06:44:30,039 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-30 06:44:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:30,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:44:30,049 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 (10)] Ended with exit code 0 [2023-08-30 06:44:30,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:30,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:30,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash -902556460, now seen corresponding path program 1 times [2023-08-30 06:44:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35536325] [2023-08-30 06:44:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:30,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:30,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:44:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:30,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:44:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:30,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:30,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35536325] [2023-08-30 06:44:30,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35536325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:30,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:30,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224956799] [2023-08-30 06:44:30,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:30,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:30,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:31,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:44:31,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 134.2) internal successors, (1342), 10 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:31,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:31,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:44:31,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:33,645 INFO L130 PetriNetUnfolder]: 19046/25547 cut-off events. [2023-08-30 06:44:33,646 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 06:44:33,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51395 conditions, 25547 events. 19046/25547 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 152096 event pairs, 5962 based on Foata normal form. 0/9605 useless extension candidates. Maximal degree in co-relation 51370. Up to 12945 conditions per place. [2023-08-30 06:44:33,762 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 116 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2023-08-30 06:44:33,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 677 flow [2023-08-30 06:44:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1316 transitions. [2023-08-30 06:44:33,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43910577243910576 [2023-08-30 06:44:33,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1316 transitions. [2023-08-30 06:44:33,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1316 transitions. [2023-08-30 06:44:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:33,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1316 transitions. [2023-08-30 06:44:33,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.22222222222223) internal successors, (1316), 9 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:33,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:33,771 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:33,771 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 9 states and 1316 transitions. [2023-08-30 06:44:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 677 flow [2023-08-30 06:44:33,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 652 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:33,774 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 260 flow [2023-08-30 06:44:33,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-30 06:44:33,775 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 06:44:33,775 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 260 flow [2023-08-30 06:44:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.2) internal successors, (1342), 10 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:33,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:33,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:44:33,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-08-30 06:44:33,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:33,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:33,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash -902556461, now seen corresponding path program 1 times [2023-08-30 06:44:33,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:33,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986122905] [2023-08-30 06:44:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:33,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:33,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:33,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:33,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:44:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:44:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:34,090 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:44:34,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:44:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:34,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:34,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:34,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986122905] [2023-08-30 06:44:34,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986122905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:34,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:34,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:44:34,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657507379] [2023-08-30 06:44:34,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:34,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:34,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:34,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:44:34,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 06:44:34,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:34,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:34,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 06:44:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:35,082 INFO L130 PetriNetUnfolder]: 8201/11381 cut-off events. [2023-08-30 06:44:35,082 INFO L131 PetriNetUnfolder]: For 2202/2599 co-relation queries the response was YES. [2023-08-30 06:44:35,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 11381 events. 8201/11381 cut-off events. For 2202/2599 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 64672 event pairs, 4347 based on Foata normal form. 397/6056 useless extension candidates. Maximal degree in co-relation 25380. Up to 11188 conditions per place. [2023-08-30 06:44:35,126 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 06:44:35,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 49 transitions, 344 flow [2023-08-30 06:44:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:44:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:44:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-30 06:44:35,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294294294294294 [2023-08-30 06:44:35,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-30 06:44:35,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-30 06:44:35,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:35,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-30 06:44:35,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:35,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:35,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:35,132 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 260 flow. Second operand 4 states and 572 transitions. [2023-08-30 06:44:35,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 49 transitions, 344 flow [2023-08-30 06:44:35,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 49 transitions, 327 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:35,135 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 249 flow [2023-08-30 06:44:35,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-30 06:44:35,136 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 06:44:35,136 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 249 flow [2023-08-30 06:44:35,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:35,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:35,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:35,143 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 [2023-08-30 06:44:35,343 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 [2023-08-30 06:44:35,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:35,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2085523947, now seen corresponding path program 1 times [2023-08-30 06:44:35,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:35,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722647410] [2023-08-30 06:44:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:35,344 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 [2023-08-30 06:44:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:35,345 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) [2023-08-30 06:44:35,345 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 [2023-08-30 06:44:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:44:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:35,479 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:35,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:35,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:35,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722647410] [2023-08-30 06:44:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722647410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:35,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202734337] [2023-08-30 06:44:35,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:35,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:37,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:44:37,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:37,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:37,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:44:37,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:40,163 INFO L130 PetriNetUnfolder]: 15095/20066 cut-off events. [2023-08-30 06:44:40,163 INFO L131 PetriNetUnfolder]: For 2541/2541 co-relation queries the response was YES. [2023-08-30 06:44:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46245 conditions, 20066 events. 15095/20066 cut-off events. For 2541/2541 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 113137 event pairs, 1863 based on Foata normal form. 450/11498 useless extension candidates. Maximal degree in co-relation 46218. Up to 6066 conditions per place. [2023-08-30 06:44:40,254 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-08-30 06:44:40,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 630 flow [2023-08-30 06:44:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:44:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:44:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1165 transitions. [2023-08-30 06:44:40,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373123123123123 [2023-08-30 06:44:40,258 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1165 transitions. [2023-08-30 06:44:40,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1165 transitions. [2023-08-30 06:44:40,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:40,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1165 transitions. [2023-08-30 06:44:40,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 145.625) internal successors, (1165), 8 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:40,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:40,264 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:40,264 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 249 flow. Second operand 8 states and 1165 transitions. [2023-08-30 06:44:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 630 flow [2023-08-30 06:44:40,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:40,270 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2023-08-30 06:44:40,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-08-30 06:44:40,270 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-30 06:44:40,270 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2023-08-30 06:44:40,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:40,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:40,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:40,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 06:44:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:40,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:40,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2085683893, now seen corresponding path program 1 times [2023-08-30 06:44:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378020853] [2023-08-30 06:44:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:40,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:40,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:44:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:44:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:40,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:40,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:40,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:41,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378020853] [2023-08-30 06:44:41,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378020853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:41,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:41,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:44:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868332029] [2023-08-30 06:44:41,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:44:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:44:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:44:41,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:44:41,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 132.75) internal successors, (1062), 8 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:41,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:41,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:44:41,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:43,435 INFO L130 PetriNetUnfolder]: 12205/16375 cut-off events. [2023-08-30 06:44:43,436 INFO L131 PetriNetUnfolder]: For 23463/24871 co-relation queries the response was YES. [2023-08-30 06:44:43,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 16375 events. 12205/16375 cut-off events. For 23463/24871 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 89298 event pairs, 6337 based on Foata normal form. 1408/11094 useless extension candidates. Maximal degree in co-relation 46005. Up to 14340 conditions per place. [2023-08-30 06:44:43,505 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-30 06:44:43,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2023-08-30 06:44:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:44:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:44:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 712 transitions. [2023-08-30 06:44:43,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276276276276276 [2023-08-30 06:44:43,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 712 transitions. [2023-08-30 06:44:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 712 transitions. [2023-08-30 06:44:43,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:43,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 712 transitions. [2023-08-30 06:44:43,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:43,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:43,521 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:43,521 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 712 transitions. [2023-08-30 06:44:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2023-08-30 06:44:43,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:43,552 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2023-08-30 06:44:43,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 06:44:43,553 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 06:44:43,553 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2023-08-30 06:44:43,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.75) internal successors, (1062), 8 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:43,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:43,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:43,567 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 [2023-08-30 06:44:43,764 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 [2023-08-30 06:44:43,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:43,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2085683891, now seen corresponding path program 1 times [2023-08-30 06:44:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:43,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319098883] [2023-08-30 06:44:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:43,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:43,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:43,766 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) [2023-08-30 06:44:43,767 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 [2023-08-30 06:44:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:44:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:43,904 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:44:43,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:44:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:43,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:43,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:43,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319098883] [2023-08-30 06:44:43,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319098883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:43,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:43,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:43,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33812726] [2023-08-30 06:44:43,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:43,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:44,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:44:44,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:44,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:44,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:44:44,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:45,213 INFO L130 PetriNetUnfolder]: 11603/15413 cut-off events. [2023-08-30 06:44:45,213 INFO L131 PetriNetUnfolder]: For 19602/20898 co-relation queries the response was YES. [2023-08-30 06:44:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40574 conditions, 15413 events. 11603/15413 cut-off events. For 19602/20898 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 81832 event pairs, 5913 based on Foata normal form. 1296/10436 useless extension candidates. Maximal degree in co-relation 40542. Up to 15251 conditions per place. [2023-08-30 06:44:45,282 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 06:44:45,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2023-08-30 06:44:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-30 06:44:45,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2023-08-30 06:44:45,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-30 06:44:45,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-30 06:44:45,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:45,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-30 06:44:45,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:45,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:45,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:45,290 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 438 transitions. [2023-08-30 06:44:45,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2023-08-30 06:44:45,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:45,308 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2023-08-30 06:44:45,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2023-08-30 06:44:45,308 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-30 06:44:45,308 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2023-08-30 06:44:45,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:45,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:45,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:45,315 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 (15)] Ended with exit code 0 [2023-08-30 06:44:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:45,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:45,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash 231686421, now seen corresponding path program 1 times [2023-08-30 06:44:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880373336] [2023-08-30 06:44:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:45,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:45,511 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 (16)] Waiting until timeout for monitored process [2023-08-30 06:44:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:45,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:45,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:44:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:45,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880373336] [2023-08-30 06:44:45,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880373336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:45,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:45,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580147950] [2023-08-30 06:44:45,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:45,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:47,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:44:47,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:47,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:47,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:44:47,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:49,192 INFO L130 PetriNetUnfolder]: 15419/21137 cut-off events. [2023-08-30 06:44:49,192 INFO L131 PetriNetUnfolder]: For 32615/34703 co-relation queries the response was YES. [2023-08-30 06:44:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57097 conditions, 21137 events. 15419/21137 cut-off events. For 32615/34703 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 122514 event pairs, 5117 based on Foata normal form. 2088/16258 useless extension candidates. Maximal degree in co-relation 57065. Up to 12297 conditions per place. [2023-08-30 06:44:49,327 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-30 06:44:49,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2023-08-30 06:44:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1284 transitions. [2023-08-30 06:44:49,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42842842842842843 [2023-08-30 06:44:49,331 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1284 transitions. [2023-08-30 06:44:49,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1284 transitions. [2023-08-30 06:44:49,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:49,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1284 transitions. [2023-08-30 06:44:49,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:49,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:49,336 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:49,337 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1284 transitions. [2023-08-30 06:44:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2023-08-30 06:44:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:49,378 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2023-08-30 06:44:49,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2023-08-30 06:44:49,378 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2023-08-30 06:44:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2023-08-30 06:44:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:49,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:49,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:49,406 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 (16)] Ended with exit code 0 [2023-08-30 06:44:49,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:49,589 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:49,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1407651807, now seen corresponding path program 1 times [2023-08-30 06:44:49,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:49,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474827800] [2023-08-30 06:44:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:49,597 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:49,602 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 (17)] Waiting until timeout for monitored process [2023-08-30 06:44:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:44:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:49,774 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:49,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:44:50,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:50,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474827800] [2023-08-30 06:44:50,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474827800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:50,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:50,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659055315] [2023-08-30 06:44:50,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:50,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:44:51,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:51,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:51,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:44:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:55,572 INFO L130 PetriNetUnfolder]: 29495/39893 cut-off events. [2023-08-30 06:44:55,572 INFO L131 PetriNetUnfolder]: For 69831/73719 co-relation queries the response was YES. [2023-08-30 06:44:55,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117691 conditions, 39893 events. 29495/39893 cut-off events. For 69831/73719 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 245968 event pairs, 3843 based on Foata normal form. 3888/34529 useless extension candidates. Maximal degree in co-relation 117656. Up to 10063 conditions per place. [2023-08-30 06:44:55,850 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2023-08-30 06:44:55,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2023-08-30 06:44:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:44:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:44:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1283 transitions. [2023-08-30 06:44:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42809476142809477 [2023-08-30 06:44:55,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1283 transitions. [2023-08-30 06:44:55,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1283 transitions. [2023-08-30 06:44:55,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:55,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1283 transitions. [2023-08-30 06:44:55,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.55555555555554) internal successors, (1283), 9 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:55,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:55,858 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:55,859 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1283 transitions. [2023-08-30 06:44:55,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2023-08-30 06:44:55,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:44:55,902 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2023-08-30 06:44:55,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2023-08-30 06:44:55,903 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-08-30 06:44:55,903 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2023-08-30 06:44:55,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:55,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:55,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:55,910 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 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:56,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:56,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash -682549601, now seen corresponding path program 1 times [2023-08-30 06:44:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:56,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285682552] [2023-08-30 06:44:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:56,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:44:56,106 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 (18)] Waiting until timeout for monitored process [2023-08-30 06:44:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:44:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:56,252 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:56,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:56,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:44:56,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:56,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285682552] [2023-08-30 06:44:56,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285682552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:56,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:56,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83374977] [2023-08-30 06:44:56,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:56,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:56,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:00,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 06:45:00,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 10 states, 10 states have (on average 128.0) internal successors, (1280), 10 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:00,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:00,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 06:45:00,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:06,479 INFO L130 PetriNetUnfolder]: 26371/37035 cut-off events. [2023-08-30 06:45:06,479 INFO L131 PetriNetUnfolder]: For 110569/117413 co-relation queries the response was YES. [2023-08-30 06:45:06,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133340 conditions, 37035 events. 26371/37035 cut-off events. For 110569/117413 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 228479 event pairs, 17163 based on Foata normal form. 6844/39544 useless extension candidates. Maximal degree in co-relation 133301. Up to 22069 conditions per place. [2023-08-30 06:45:06,735 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 156 selfloop transitions, 15 changer transitions 0/175 dead transitions. [2023-08-30 06:45:06,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 175 transitions, 1396 flow [2023-08-30 06:45:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:45:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:45:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1493 transitions. [2023-08-30 06:45:06,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075894075894076 [2023-08-30 06:45:06,740 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1493 transitions. [2023-08-30 06:45:06,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1493 transitions. [2023-08-30 06:45:06,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:06,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1493 transitions. [2023-08-30 06:45:06,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 135.72727272727272) internal successors, (1493), 11 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:06,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:06,746 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:06,746 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 11 states and 1493 transitions. [2023-08-30 06:45:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 175 transitions, 1396 flow [2023-08-30 06:45:06,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 175 transitions, 1312 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-08-30 06:45:06,862 INFO L231 Difference]: Finished difference. Result has 103 places, 62 transitions, 438 flow [2023-08-30 06:45:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=438, PETRI_PLACES=103, PETRI_TRANSITIONS=62} [2023-08-30 06:45:06,862 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2023-08-30 06:45:06,862 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 62 transitions, 438 flow [2023-08-30 06:45:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.0) internal successors, (1280), 10 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:06,872 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 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:07,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:07,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:07,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1149885804, now seen corresponding path program 2 times [2023-08-30 06:45:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138074388] [2023-08-30 06:45:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:07,074 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:07,076 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 (19)] Waiting until timeout for monitored process [2023-08-30 06:45:07,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:45:07,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:07,239 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:07,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:08,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138074388] [2023-08-30 06:45:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138074388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:08,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:45:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604748272] [2023-08-30 06:45:08,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:45:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:45:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:45:14,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:45:14,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 62 transitions, 438 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:14,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:14,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:45:14,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:26,645 INFO L130 PetriNetUnfolder]: 30193/41898 cut-off events. [2023-08-30 06:45:26,645 INFO L131 PetriNetUnfolder]: For 98371/102250 co-relation queries the response was YES. [2023-08-30 06:45:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157733 conditions, 41898 events. 30193/41898 cut-off events. For 98371/102250 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 275645 event pairs, 9493 based on Foata normal form. 4225/42241 useless extension candidates. Maximal degree in co-relation 157692. Up to 15994 conditions per place. [2023-08-30 06:45:26,930 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 309 selfloop transitions, 24 changer transitions 0/338 dead transitions. [2023-08-30 06:45:26,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 338 transitions, 2472 flow [2023-08-30 06:45:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:45:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:45:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2639 transitions. [2023-08-30 06:45:26,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710131183815397 [2023-08-30 06:45:26,935 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2639 transitions. [2023-08-30 06:45:26,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2639 transitions. [2023-08-30 06:45:26,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:26,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2639 transitions. [2023-08-30 06:45:26,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.89473684210526) internal successors, (2639), 19 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:26,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:26,944 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:26,944 INFO L175 Difference]: Start difference. First operand has 103 places, 62 transitions, 438 flow. Second operand 19 states and 2639 transitions. [2023-08-30 06:45:26,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 338 transitions, 2472 flow [2023-08-30 06:45:27,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 338 transitions, 2429 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 06:45:27,276 INFO L231 Difference]: Finished difference. Result has 120 places, 74 transitions, 567 flow [2023-08-30 06:45:27,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=567, PETRI_PLACES=120, PETRI_TRANSITIONS=74} [2023-08-30 06:45:27,277 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2023-08-30 06:45:27,277 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 74 transitions, 567 flow [2023-08-30 06:45:27,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:27,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:27,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:27,284 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 (19)] Ended with exit code 0 [2023-08-30 06:45:27,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:27,478 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:27,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash 315801535, now seen corresponding path program 1 times [2023-08-30 06:45:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:27,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288387881] [2023-08-30 06:45:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:27,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:27,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:27,479 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:27,482 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 (20)] Waiting until timeout for monitored process [2023-08-30 06:45:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:27,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:45:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:27,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:27,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288387881] [2023-08-30 06:45:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288387881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:27,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:45:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529168835] [2023-08-30 06:45:27,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:45:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:45:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:45:28,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:45:28,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 74 transitions, 567 flow. Second operand has 12 states, 12 states have (on average 134.83333333333334) internal successors, (1618), 12 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:28,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:28,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:45:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:32,383 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2023-08-30 06:45:32,383 INFO L131 PetriNetUnfolder]: For 127945/133457 co-relation queries the response was YES. [2023-08-30 06:45:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125681 conditions, 30859 events. 21755/30859 cut-off events. For 127945/133457 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 192098 event pairs, 11742 based on Foata normal form. 5600/34791 useless extension candidates. Maximal degree in co-relation 125636. Up to 22588 conditions per place. [2023-08-30 06:45:32,587 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2023-08-30 06:45:32,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 160 transitions, 1399 flow [2023-08-30 06:45:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:45:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:45:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1412 transitions. [2023-08-30 06:45:32,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424024024024024 [2023-08-30 06:45:32,591 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1412 transitions. [2023-08-30 06:45:32,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1412 transitions. [2023-08-30 06:45:32,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:32,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1412 transitions. [2023-08-30 06:45:32,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.2) internal successors, (1412), 10 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:32,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:32,595 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:32,596 INFO L175 Difference]: Start difference. First operand has 120 places, 74 transitions, 567 flow. Second operand 10 states and 1412 transitions. [2023-08-30 06:45:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 160 transitions, 1399 flow [2023-08-30 06:45:32,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1320 flow, removed 29 selfloop flow, removed 6 redundant places. [2023-08-30 06:45:32,815 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 564 flow [2023-08-30 06:45:32,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2023-08-30 06:45:32,815 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 06:45:32,815 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 564 flow [2023-08-30 06:45:32,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.83333333333334) internal successors, (1618), 12 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:32,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:32,816 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:32,823 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 (20)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:33,021 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:33,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash 709403669, now seen corresponding path program 2 times [2023-08-30 06:45:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996423277] [2023-08-30 06:45:33,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:33,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:33,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:33,022 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:33,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:45:33,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:33,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:45:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:33,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:33,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:33,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:34,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:34,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996423277] [2023-08-30 06:45:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996423277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:34,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:34,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:45:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925511135] [2023-08-30 06:45:34,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:34,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:45:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:45:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:45:41,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 333 [2023-08-30 06:45:41,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:41,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:41,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 333 [2023-08-30 06:45:41,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:53,962 INFO L130 PetriNetUnfolder]: 25495/35088 cut-off events. [2023-08-30 06:45:53,962 INFO L131 PetriNetUnfolder]: For 150099/153829 co-relation queries the response was YES. [2023-08-30 06:45:54,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155060 conditions, 35088 events. 25495/35088 cut-off events. For 150099/153829 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 221720 event pairs, 8394 based on Foata normal form. 3932/35562 useless extension candidates. Maximal degree in co-relation 155012. Up to 15754 conditions per place. [2023-08-30 06:45:54,267 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2023-08-30 06:45:54,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 2927 flow [2023-08-30 06:45:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:45:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:45:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2595 transitions. [2023-08-30 06:45:54,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41014698909435754 [2023-08-30 06:45:54,273 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2595 transitions. [2023-08-30 06:45:54,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2595 transitions. [2023-08-30 06:45:54,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:54,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2595 transitions. [2023-08-30 06:45:54,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 136.57894736842104) internal successors, (2595), 19 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:54,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:54,281 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:54,281 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 564 flow. Second operand 19 states and 2595 transitions. [2023-08-30 06:45:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 2927 flow [2023-08-30 06:45:54,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 349 transitions, 2908 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:45:54,566 INFO L231 Difference]: Finished difference. Result has 144 places, 87 transitions, 704 flow [2023-08-30 06:45:54,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=144, PETRI_TRANSITIONS=87} [2023-08-30 06:45:54,566 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2023-08-30 06:45:54,566 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 87 transitions, 704 flow [2023-08-30 06:45:54,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:54,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:54,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:54,576 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 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:54,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:54,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash -254601804, now seen corresponding path program 2 times [2023-08-30 06:45:54,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:54,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554940447] [2023-08-30 06:45:54,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:54,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:54,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:54,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:45:54,778 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 (22)] Waiting until timeout for monitored process [2023-08-30 06:45:54,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:45:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:54,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:54,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:55,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:56,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554940447] [2023-08-30 06:45:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554940447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:56,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:45:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942571033] [2023-08-30 06:45:56,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:45:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:45:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:46:08,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 333 [2023-08-30 06:46:08,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 704 flow. Second operand has 14 states, 14 states have (on average 126.71428571428571) internal successors, (1774), 14 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:08,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:08,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 333 [2023-08-30 06:46:08,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:19,763 INFO L130 PetriNetUnfolder]: 32725/46053 cut-off events. [2023-08-30 06:46:19,763 INFO L131 PetriNetUnfolder]: For 237385/245433 co-relation queries the response was YES. [2023-08-30 06:46:20,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214149 conditions, 46053 events. 32725/46053 cut-off events. For 237385/245433 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 301783 event pairs, 12293 based on Foata normal form. 8448/52355 useless extension candidates. Maximal degree in co-relation 214095. Up to 11568 conditions per place. [2023-08-30 06:46:20,344 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 383 selfloop transitions, 25 changer transitions 0/414 dead transitions. [2023-08-30 06:46:20,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 414 transitions, 3909 flow [2023-08-30 06:46:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:46:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:46:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2566 transitions. [2023-08-30 06:46:20,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40556345819503714 [2023-08-30 06:46:20,348 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2566 transitions. [2023-08-30 06:46:20,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2566 transitions. [2023-08-30 06:46:20,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:20,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2566 transitions. [2023-08-30 06:46:20,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.05263157894737) internal successors, (2566), 19 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,355 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,355 INFO L175 Difference]: Start difference. First operand has 144 places, 87 transitions, 704 flow. Second operand 19 states and 2566 transitions. [2023-08-30 06:46:20,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 414 transitions, 3909 flow [2023-08-30 06:46:21,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 414 transitions, 3729 flow, removed 83 selfloop flow, removed 5 redundant places. [2023-08-30 06:46:21,048 INFO L231 Difference]: Finished difference. Result has 161 places, 98 transitions, 839 flow [2023-08-30 06:46:21,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=839, PETRI_PLACES=161, PETRI_TRANSITIONS=98} [2023-08-30 06:46:21,049 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 104 predicate places. [2023-08-30 06:46:21,049 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 98 transitions, 839 flow [2023-08-30 06:46:21,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.71428571428571) internal successors, (1774), 14 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:21,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:21,049 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:46:21,058 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 (22)] Forceful destruction successful, exit code 0 [2023-08-30 06:46:21,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:21,250 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:21,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash 269576596, now seen corresponding path program 3 times [2023-08-30 06:46:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:21,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120592639] [2023-08-30 06:46:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:46:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:21,252 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:46:21,254 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 (23)] Waiting until timeout for monitored process [2023-08-30 06:46:21,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:46:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:46:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:21,463 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:21,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:23,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120592639] [2023-08-30 06:46:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120592639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:23,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:23,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:46:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86222250] [2023-08-30 06:46:23,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:23,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:46:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:46:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:46:33,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:46:33,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 98 transitions, 839 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:33,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:33,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:46:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:58,604 INFO L130 PetriNetUnfolder]: 66073/90961 cut-off events. [2023-08-30 06:46:58,605 INFO L131 PetriNetUnfolder]: For 645991/663867 co-relation queries the response was YES. [2023-08-30 06:46:59,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473933 conditions, 90961 events. 66073/90961 cut-off events. For 645991/663867 co-relation queries the response was YES. Maximal size of possible extension queue 2391. Compared 595755 event pairs, 43743 based on Foata normal form. 17888/108554 useless extension candidates. Maximal degree in co-relation 473874. Up to 26277 conditions per place. [2023-08-30 06:46:59,819 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 726 selfloop transitions, 24 changer transitions 0/761 dead transitions. [2023-08-30 06:46:59,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 761 transitions, 6947 flow [2023-08-30 06:46:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:46:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:46:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3759 transitions. [2023-08-30 06:46:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47034534534534533 [2023-08-30 06:46:59,823 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3759 transitions. [2023-08-30 06:46:59,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3759 transitions. [2023-08-30 06:46:59,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:59,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3759 transitions. [2023-08-30 06:46:59,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 156.625) internal successors, (3759), 24 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:59,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:59,831 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:59,831 INFO L175 Difference]: Start difference. First operand has 161 places, 98 transitions, 839 flow. Second operand 24 states and 3759 transitions. [2023-08-30 06:46:59,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 761 transitions, 6947 flow [2023-08-30 06:47:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 761 transitions, 6888 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-30 06:47:04,479 INFO L231 Difference]: Finished difference. Result has 188 places, 111 transitions, 991 flow [2023-08-30 06:47:04,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=991, PETRI_PLACES=188, PETRI_TRANSITIONS=111} [2023-08-30 06:47:04,480 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-08-30 06:47:04,480 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 111 transitions, 991 flow [2023-08-30 06:47:04,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:04,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:04,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:47:04,488 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:04,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:04,685 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:04,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1857121760, now seen corresponding path program 3 times [2023-08-30 06:47:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:04,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747400300] [2023-08-30 06:47:04,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:47:04,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:04,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:04,687 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:04,688 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 (24)] Waiting until timeout for monitored process [2023-08-30 06:47:04,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:47:04,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:47:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:05,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:05,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747400300] [2023-08-30 06:47:05,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747400300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:05,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:05,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 06:47:05,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23997983] [2023-08-30 06:47:05,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:47:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:47:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:47:06,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 06:47:06,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 111 transitions, 991 flow. Second operand has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:06,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:06,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 06:47:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:21,705 INFO L130 PetriNetUnfolder]: 69341/95476 cut-off events. [2023-08-30 06:47:21,706 INFO L131 PetriNetUnfolder]: For 636227/645871 co-relation queries the response was YES. [2023-08-30 06:47:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493074 conditions, 95476 events. 69341/95476 cut-off events. For 636227/645871 co-relation queries the response was YES. Maximal size of possible extension queue 2397. Compared 643132 event pairs, 24053 based on Foata normal form. 10236/104288 useless extension candidates. Maximal degree in co-relation 493003. Up to 46393 conditions per place. [2023-08-30 06:47:23,272 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 523 selfloop transitions, 37 changer transitions 0/568 dead transitions. [2023-08-30 06:47:23,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 568 transitions, 5187 flow [2023-08-30 06:47:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:47:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:47:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3650 transitions. [2023-08-30 06:47:23,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2023-08-30 06:47:23,276 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3650 transitions. [2023-08-30 06:47:23,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3650 transitions. [2023-08-30 06:47:23,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:23,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3650 transitions. [2023-08-30 06:47:23,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 333.0) internal successors, (8658), 26 states have internal predecessors, (8658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,284 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 333.0) internal successors, (8658), 26 states have internal predecessors, (8658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,284 INFO L175 Difference]: Start difference. First operand has 188 places, 111 transitions, 991 flow. Second operand 25 states and 3650 transitions. [2023-08-30 06:47:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 568 transitions, 5187 flow [2023-08-30 06:47:28,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 568 transitions, 5139 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 06:47:28,682 INFO L231 Difference]: Finished difference. Result has 209 places, 123 transitions, 1171 flow [2023-08-30 06:47:28,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1171, PETRI_PLACES=209, PETRI_TRANSITIONS=123} [2023-08-30 06:47:28,683 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-08-30 06:47:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 123 transitions, 1171 flow [2023-08-30 06:47:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:28,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:28,684 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:28,692 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:28,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:28,892 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:28,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1135506602, now seen corresponding path program 2 times [2023-08-30 06:47:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:28,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017099296] [2023-08-30 06:47:28,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:28,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:28,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:28,894 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:28,895 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 (25)] Waiting until timeout for monitored process [2023-08-30 06:47:28,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:47:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:47:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:29,064 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:29,064 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:47:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:47:29,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:29,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017099296] [2023-08-30 06:47:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017099296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:29,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:47:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633810055] [2023-08-30 06:47:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:29,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:47:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:47:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:47:29,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:47:29,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 123 transitions, 1171 flow. Second operand has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:29,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:29,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:47:29,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:42,775 INFO L130 PetriNetUnfolder]: 66187/93179 cut-off events. [2023-08-30 06:47:42,775 INFO L131 PetriNetUnfolder]: For 767676/784748 co-relation queries the response was YES. [2023-08-30 06:47:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497178 conditions, 93179 events. 66187/93179 cut-off events. For 767676/784748 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 616213 event pairs, 40351 based on Foata normal form. 25256/118332 useless extension candidates. Maximal degree in co-relation 497099. Up to 77391 conditions per place. [2023-08-30 06:47:44,326 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 153 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2023-08-30 06:47:44,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 180 transitions, 2029 flow [2023-08-30 06:47:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:47:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:47:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-08-30 06:47:44,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174174174174174 [2023-08-30 06:47:44,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-08-30 06:47:44,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-08-30 06:47:44,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:44,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-08-30 06:47:44,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:44,330 INFO L175 Difference]: Start difference. First operand has 209 places, 123 transitions, 1171 flow. Second operand 5 states and 695 transitions. [2023-08-30 06:47:44,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 180 transitions, 2029 flow [2023-08-30 06:47:49,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 180 transitions, 1945 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 06:47:49,390 INFO L231 Difference]: Finished difference. Result has 204 places, 123 transitions, 1172 flow [2023-08-30 06:47:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1172, PETRI_PLACES=204, PETRI_TRANSITIONS=123} [2023-08-30 06:47:49,390 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 147 predicate places. [2023-08-30 06:47:49,390 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 123 transitions, 1172 flow [2023-08-30 06:47:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:49,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:49,400 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 (25)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:49,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:49,591 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:49,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2114886102, now seen corresponding path program 3 times [2023-08-30 06:47:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:49,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338548931] [2023-08-30 06:47:49,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:47:49,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:47:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:49,593 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:47:49,594 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 (26)] Waiting until timeout for monitored process [2023-08-30 06:47:49,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:47:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:47:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:49,817 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:49,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:47:49,874 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 13 treesize of output 9 [2023-08-30 06:47:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:47:49,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:47:50,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338548931] [2023-08-30 06:47:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338548931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:50,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:50,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:47:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98462929] [2023-08-30 06:47:50,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:50,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:47:50,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:47:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:47:52,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:47:52,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 123 transitions, 1172 flow. Second operand has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:52,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:52,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:47:52,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:06,199 INFO L130 PetriNetUnfolder]: 58986/83098 cut-off events. [2023-08-30 06:48:06,199 INFO L131 PetriNetUnfolder]: For 915320/938624 co-relation queries the response was YES. [2023-08-30 06:48:07,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466520 conditions, 83098 events. 58986/83098 cut-off events. For 915320/938624 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 550948 event pairs, 26081 based on Foata normal form. 23356/106228 useless extension candidates. Maximal degree in co-relation 466440. Up to 48947 conditions per place. [2023-08-30 06:48:07,874 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 218 selfloop transitions, 21 changer transitions 0/249 dead transitions. [2023-08-30 06:48:07,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 249 transitions, 2448 flow [2023-08-30 06:48:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:48:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:48:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1908 transitions. [2023-08-30 06:48:07,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092664092664093 [2023-08-30 06:48:07,877 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1908 transitions. [2023-08-30 06:48:07,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1908 transitions. [2023-08-30 06:48:07,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:07,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1908 transitions. [2023-08-30 06:48:07,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.28571428571428) internal successors, (1908), 14 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,881 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,881 INFO L175 Difference]: Start difference. First operand has 204 places, 123 transitions, 1172 flow. Second operand 14 states and 1908 transitions. [2023-08-30 06:48:07,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 249 transitions, 2448 flow [2023-08-30 06:48:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 249 transitions, 2372 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 06:48:10,343 INFO L231 Difference]: Finished difference. Result has 218 places, 127 transitions, 1230 flow [2023-08-30 06:48:10,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1230, PETRI_PLACES=218, PETRI_TRANSITIONS=127} [2023-08-30 06:48:10,344 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 161 predicate places. [2023-08-30 06:48:10,344 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 127 transitions, 1230 flow [2023-08-30 06:48:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:10,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:10,344 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 06:48:10,352 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:10,547 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:48:10,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2028591788, now seen corresponding path program 4 times [2023-08-30 06:48:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652395306] [2023-08-30 06:48:10,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:48:10,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:10,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:10,548 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:10,550 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 (27)] Waiting until timeout for monitored process [2023-08-30 06:48:10,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:48:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:48:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:11,506 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 38 treesize of output 32 [2023-08-30 06:48:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:48:12,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652395306] [2023-08-30 06:48:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652395306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:12,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-30 06:48:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981374592] [2023-08-30 06:48:12,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:12,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 06:48:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 06:48:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-08-30 06:48:22,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:48:22,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 127 transitions, 1230 flow. Second operand has 26 states, 26 states have (on average 133.07692307692307) internal successors, (3460), 26 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:22,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:22,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:48:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:47,414 INFO L130 PetriNetUnfolder]: 83447/120976 cut-off events. [2023-08-30 06:48:47,414 INFO L131 PetriNetUnfolder]: For 988052/1020830 co-relation queries the response was YES. [2023-08-30 06:48:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651552 conditions, 120976 events. 83447/120976 cut-off events. For 988052/1020830 co-relation queries the response was YES. Maximal size of possible extension queue 2632. Compared 906040 event pairs, 20955 based on Foata normal form. 34532/155390 useless extension candidates. Maximal degree in co-relation 651468. Up to 28909 conditions per place. [2023-08-30 06:48:49,679 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 878 selfloop transitions, 47 changer transitions 0/934 dead transitions. [2023-08-30 06:48:49,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 934 transitions, 8562 flow [2023-08-30 06:48:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 06:48:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 06:48:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6199 transitions. [2023-08-30 06:48:49,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44322894322894324 [2023-08-30 06:48:49,684 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6199 transitions. [2023-08-30 06:48:49,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6199 transitions. [2023-08-30 06:48:49,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:49,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6199 transitions. [2023-08-30 06:48:49,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 147.5952380952381) internal successors, (6199), 42 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:49,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:49,696 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:49,696 INFO L175 Difference]: Start difference. First operand has 218 places, 127 transitions, 1230 flow. Second operand 42 states and 6199 transitions. [2023-08-30 06:48:49,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 934 transitions, 8562 flow [2023-08-30 06:48:56,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 934 transitions, 8549 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 06:48:56,914 INFO L231 Difference]: Finished difference. Result has 259 places, 155 transitions, 1648 flow [2023-08-30 06:48:56,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1648, PETRI_PLACES=259, PETRI_TRANSITIONS=155} [2023-08-30 06:48:56,915 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 202 predicate places. [2023-08-30 06:48:56,915 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 155 transitions, 1648 flow [2023-08-30 06:48:56,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 133.07692307692307) internal successors, (3460), 26 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:56,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:56,925 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:48:57,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:57,120 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:48:57,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1999480833, now seen corresponding path program 3 times [2023-08-30 06:48:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:57,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572151367] [2023-08-30 06:48:57,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:48:57,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:57,122 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:48:57,123 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 (28)] Waiting until timeout for monitored process [2023-08-30 06:48:57,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:48:57,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:48:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:57,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:48:57,500 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 7 treesize of output 5 [2023-08-30 06:48:57,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 12 [2023-08-30 06:48:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:48:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:57,872 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 8 treesize of output 6 [2023-08-30 06:48:57,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 11 [2023-08-30 06:48:57,902 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:48:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:48:59,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572151367] [2023-08-30 06:48:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572151367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:59,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:48:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591614727] [2023-08-30 06:48:59,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:59,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:48:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:59,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:48:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:49:05,453 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 [1] [2023-08-30 06:49:08,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 06:49:08,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 155 transitions, 1648 flow. Second operand has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:08,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:49:08,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 06:49:08,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:49:33,553 INFO L130 PetriNetUnfolder]: 107871/157243 cut-off events. [2023-08-30 06:49:33,553 INFO L131 PetriNetUnfolder]: For 1403388/1426948 co-relation queries the response was YES. [2023-08-30 06:49:36,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874730 conditions, 157243 events. 107871/157243 cut-off events. For 1403388/1426948 co-relation queries the response was YES. Maximal size of possible extension queue 3207. Compared 1215201 event pairs, 16193 based on Foata normal form. 36696/193836 useless extension candidates. Maximal degree in co-relation 874640. Up to 54744 conditions per place. [2023-08-30 06:49:36,935 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 362 selfloop transitions, 24 changer transitions 0/399 dead transitions. [2023-08-30 06:49:36,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 399 transitions, 4900 flow [2023-08-30 06:49:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:49:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:49:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 968 transitions. [2023-08-30 06:49:36,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41527241527241526 [2023-08-30 06:49:36,937 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 968 transitions. [2023-08-30 06:49:36,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 968 transitions. [2023-08-30 06:49:36,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:36,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 968 transitions. [2023-08-30 06:49:36,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:36,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:36,940 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:36,940 INFO L175 Difference]: Start difference. First operand has 259 places, 155 transitions, 1648 flow. Second operand 7 states and 968 transitions. [2023-08-30 06:49:36,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 399 transitions, 4900 flow [2023-08-30 06:49:49,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 399 transitions, 4071 flow, removed 244 selfloop flow, removed 22 redundant places. [2023-08-30 06:49:49,520 INFO L231 Difference]: Finished difference. Result has 243 places, 155 transitions, 1409 flow [2023-08-30 06:49:49,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1409, PETRI_PLACES=243, PETRI_TRANSITIONS=155} [2023-08-30 06:49:49,521 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 186 predicate places. [2023-08-30 06:49:49,521 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 155 transitions, 1409 flow [2023-08-30 06:49:49,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:49,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:49,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:49:49,529 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 06:49:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:49,729 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:49:49,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -190274720, now seen corresponding path program 4 times [2023-08-30 06:49:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609864845] [2023-08-30 06:49:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:49:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:49,738 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:49,740 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 (29)] Waiting until timeout for monitored process [2023-08-30 06:49:49,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:49:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:49:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:49,968 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:49,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:49:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:50,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:52,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609864845] [2023-08-30 06:49:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609864845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:52,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:49:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636585170] [2023-08-30 06:49:52,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:49:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:49:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:50:08,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:50:08,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 155 transitions, 1409 flow. Second operand has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:08,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:50:08,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:50:08,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:51:14,292 INFO L130 PetriNetUnfolder]: 178710/254573 cut-off events. [2023-08-30 06:51:14,292 INFO L131 PetriNetUnfolder]: For 2505194/2549021 co-relation queries the response was YES. [2023-08-30 06:51:18,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428054 conditions, 254573 events. 178710/254573 cut-off events. For 2505194/2549021 co-relation queries the response was YES. Maximal size of possible extension queue 4847. Compared 1974721 event pairs, 19126 based on Foata normal form. 64371/318777 useless extension candidates. Maximal degree in co-relation 1427969. Up to 59921 conditions per place. [2023-08-30 06:51:20,082 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 932 selfloop transitions, 49 changer transitions 0/995 dead transitions. [2023-08-30 06:51:20,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 995 transitions, 9389 flow [2023-08-30 06:51:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 06:51:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 06:51:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5009 transitions. [2023-08-30 06:51:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178345011678345 [2023-08-30 06:51:20,086 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5009 transitions. [2023-08-30 06:51:20,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5009 transitions. [2023-08-30 06:51:20,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:51:20,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5009 transitions. [2023-08-30 06:51:20,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 139.13888888888889) internal successors, (5009), 36 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:20,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:20,097 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:20,097 INFO L175 Difference]: Start difference. First operand has 243 places, 155 transitions, 1409 flow. Second operand 36 states and 5009 transitions. [2023-08-30 06:51:20,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 995 transitions, 9389 flow [2023-08-30 06:53:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 995 transitions, 9263 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-30 06:53:09,901 INFO L231 Difference]: Finished difference. Result has 280 places, 168 transitions, 1637 flow [2023-08-30 06:53:09,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1637, PETRI_PLACES=280, PETRI_TRANSITIONS=168} [2023-08-30 06:53:09,902 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 223 predicate places. [2023-08-30 06:53:09,902 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 168 transitions, 1637 flow [2023-08-30 06:53:09,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:09,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:53:09,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:53:09,910 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 (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:53:10,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:10,105 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:53:10,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:53:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 119636929, now seen corresponding path program 5 times [2023-08-30 06:53:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:53:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102045795] [2023-08-30 06:53:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:53:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:53:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:53:10,107 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:53:10,107 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 (30)] Waiting until timeout for monitored process [2023-08-30 06:53:10,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 06:53:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:53:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:53:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:53:10,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:53:10,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:53:10,677 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 7 treesize of output 5 [2023-08-30 06:53:10,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 06:53:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:53:10,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:53:10,869 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 8 treesize of output 6 [2023-08-30 06:53:10,882 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:53:10,887 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:53:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:53:12,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:53:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102045795] [2023-08-30 06:53:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102045795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:53:12,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:53:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-30 06:53:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921540474] [2023-08-30 06:53:12,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:53:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 06:53:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:53:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 06:53:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-30 06:53:33,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 06:53:33,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 168 transitions, 1637 flow. Second operand has 22 states, 22 states have (on average 131.36363636363637) internal successors, (2890), 22 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:33,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:53:33,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 06:53:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:25,129 INFO L130 PetriNetUnfolder]: 178152/253947 cut-off events. [2023-08-30 06:54:25,130 INFO L131 PetriNetUnfolder]: For 2458434/2501994 co-relation queries the response was YES. [2023-08-30 06:54:30,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532955 conditions, 253947 events. 178152/253947 cut-off events. For 2458434/2501994 co-relation queries the response was YES. Maximal size of possible extension queue 4893. Compared 1913301 event pairs, 129150 based on Foata normal form. 43708/297374 useless extension candidates. Maximal degree in co-relation 1532864. Up to 234674 conditions per place. [2023-08-30 06:54:31,370 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 389 selfloop transitions, 33 changer transitions 0/436 dead transitions. [2023-08-30 06:54:31,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 436 transitions, 4071 flow [2023-08-30 06:54:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 06:54:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 06:54:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2958 transitions. [2023-08-30 06:54:31,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42299442299442297 [2023-08-30 06:54:31,375 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2958 transitions. [2023-08-30 06:54:31,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2958 transitions. [2023-08-30 06:54:31,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:31,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2958 transitions. [2023-08-30 06:54:31,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 140.85714285714286) internal successors, (2958), 21 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:31,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:31,381 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:31,381 INFO L175 Difference]: Start difference. First operand has 280 places, 168 transitions, 1637 flow. Second operand 21 states and 2958 transitions. [2023-08-30 06:54:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 436 transitions, 4071 flow Killed by 15