./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:01:24,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:01:24,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:01:24,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:01:24,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:01:25,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:01:25,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:01:25,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:01:25,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:01:25,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:01:25,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:01:25,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:01:25,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:01:25,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:01:25,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:01:25,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:01:25,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:01:25,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:01:25,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:01:25,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:01:25,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:01:25,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:01:25,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:01:25,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:01:25,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:01:25,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:01:25,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:01:25,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:01:25,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:01:25,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:01:25,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:01:25,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:01:25,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:01:25,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:01:25,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:01:25,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:01:25,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:01:25,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:01:25,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:01:25,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:01:25,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:01:25,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:01:25,100 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:01:25,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:01:25,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:01:25,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:01:25,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:01:25,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:01:25,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:01:25,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:01:25,104 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:01:25,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:01:25,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:01:25,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:01:25,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:01:25,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:01:25,107 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:01:25,107 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:01:25,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:01:25,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:01:25,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:01:25,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:01:25,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:25,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:01:25,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:01:25,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:01:25,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:01:25,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:01:25,109 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:01:25,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:01:25,109 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:01:25,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:01:25,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:01:25,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:01:25,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:01:25,422 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:01:25,422 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:01:25,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-09-01 04:01:26,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:01:26,855 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:01:26,856 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-09-01 04:01:26,863 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd005abff/090588a075564d92be8ba7025defe184/FLAGdec278e92 [2023-09-01 04:01:26,878 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd005abff/090588a075564d92be8ba7025defe184 [2023-09-01 04:01:26,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:01:26,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:01:26,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:26,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:01:26,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:01:26,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:26" (1/1) ... [2023-09-01 04:01:26,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da4fa81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:26, skipping insertion in model container [2023-09-01 04:01:26,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:26" (1/1) ... [2023-09-01 04:01:26,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:01:26,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:27,101 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-two-queue.wvr.c[2987,3000] [2023-09-01 04:01:27,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:27,130 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 04:01:27,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@212f7c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:27, skipping insertion in model container [2023-09-01 04:01:27,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:27,133 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:01:27,134 INFO L158 Benchmark]: Toolchain (without parser) took 252.04ms. Allocated memory is still 77.6MB. Free memory was 54.8MB in the beginning and 45.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:01:27,135 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:01:27,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.34ms. Allocated memory is still 77.6MB. Free memory was 54.8MB in the beginning and 45.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:01:27,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.34ms. Allocated memory is still 77.6MB. Free memory was 54.8MB in the beginning and 45.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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-two-queue.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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:01:28,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:01:28,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:01:28,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:01:28,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:01:28,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:01:28,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:01:28,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:01:28,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:01:28,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:01:28,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:01:28,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:01:28,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:01:28,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:01:28,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:01:28,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:01:28,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:01:28,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:01:28,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:01:28,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:01:28,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:01:28,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:01:28,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:01:28,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:01:28,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:01:28,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:01:28,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:01:28,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:01:28,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:01:28,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:01:28,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:01:28,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:01:28,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:01:28,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:01:28,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:01:28,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:01:28,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:01:28,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:01:28,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:01:28,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:01:28,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:01:28,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:01:29,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:01:29,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:01:29,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:01:29,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:01:29,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:01:29,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:01:29,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:01:29,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:01:29,024 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:01:29,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:01:29,025 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:01:29,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:01:29,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:01:29,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:01:29,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:01:29,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:01:29,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:01:29,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:01:29,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:01:29,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:01:29,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:01:29,027 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:01:29,027 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:01:29,027 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:01:29,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:01:29,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:01:29,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:01:29,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:29,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:01:29,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:01:29,029 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:01:29,029 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:01:29,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:01:29,029 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:01:29,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:01:29,030 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:01:29,030 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:01:29,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:01:29,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:01:29,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:01:29,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:01:29,346 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:01:29,346 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:01:29,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-09-01 04:01:30,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:01:30,864 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:01:30,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-09-01 04:01:30,874 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba08289ce/521938e63ac84793beb6bbc448ea00d9/FLAGf3cb5f644 [2023-09-01 04:01:30,887 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba08289ce/521938e63ac84793beb6bbc448ea00d9 [2023-09-01 04:01:30,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:01:30,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:01:30,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:30,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:01:30,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:01:30,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:30" (1/1) ... [2023-09-01 04:01:30,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eea7e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:30, skipping insertion in model container [2023-09-01 04:01:30,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:30" (1/1) ... [2023-09-01 04:01:30,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:01:30,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:31,061 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-two-queue.wvr.c[2987,3000] [2023-09-01 04:01:31,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:31,081 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:01:31,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:31,111 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-two-queue.wvr.c[2987,3000] [2023-09-01 04:01:31,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:31,128 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:01:31,149 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-two-queue.wvr.c[2987,3000] [2023-09-01 04:01:31,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:31,160 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:01:31,161 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:01:31,166 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:01:31,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31 WrapperNode [2023-09-01 04:01:31,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:31,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:01:31,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:01:31,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:01:31,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,207 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2023-09-01 04:01:31,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:01:31,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:01:31,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:01:31,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:01:31,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,237 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:01:31,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:01:31,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:01:31,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:01:31,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (1/1) ... [2023-09-01 04:01:31,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:01:31,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:01:31,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:01:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:01:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:01:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:01:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:01:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:01:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:01:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:01:31,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:01:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 04:01:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 04:01:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:01:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:01:31,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:01:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:01:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:01:31,307 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:01:31,406 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:01:31,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:01:31,864 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:01:32,071 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:01:32,071 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 04:01:32,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:01:32 BoogieIcfgContainer [2023-09-01 04:01:32,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:01:32,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:01:32,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:01:32,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:01:32,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:01:30" (1/3) ... [2023-09-01 04:01:32,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac30f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:01:32, skipping insertion in model container [2023-09-01 04:01:32,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:31" (2/3) ... [2023-09-01 04:01:32,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac30f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:01:32, skipping insertion in model container [2023-09-01 04:01:32,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:01:32" (3/3) ... [2023-09-01 04:01:32,082 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-09-01 04:01:32,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:01:32,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 04:01:32,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:01:32,179 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:01:32,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 187 transitions, 390 flow [2023-09-01 04:01:32,329 INFO L130 PetriNetUnfolder]: 13/185 cut-off events. [2023-09-01 04:01:32,329 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:01:32,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 185 events. 13/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-09-01 04:01:32,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 187 transitions, 390 flow [2023-09-01 04:01:32,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 181 transitions, 374 flow [2023-09-01 04:01:32,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:01:32,363 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 181 transitions, 374 flow [2023-09-01 04:01:32,367 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 181 transitions, 374 flow [2023-09-01 04:01:32,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 181 transitions, 374 flow [2023-09-01 04:01:32,417 INFO L130 PetriNetUnfolder]: 13/181 cut-off events. [2023-09-01 04:01:32,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:01:32,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 13/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 173 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-09-01 04:01:32,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2023-09-01 04:01:46,132 INFO L134 LiptonReduction]: Checked pairs total: 2620 [2023-09-01 04:01:46,133 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 04:01:46,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:01:46,149 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;@26ebf4ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:01:46,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-09-01 04:01:46,152 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:01:46,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:01:46,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:46,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:46,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:46,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 26264, now seen corresponding path program 1 times [2023-09-01 04:01:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:46,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432702021] [2023-09-01 04:01:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:46,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:46,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:46,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:01:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:01:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:46,460 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:01:46,461 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:01:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:46,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:46,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:46,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432702021] [2023-09-01 04:01:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432702021] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:46,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:46,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986129051] [2023-09-01 04:01:46,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:46,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:46,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-09-01 04:01:46,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:46,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:46,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-09-01 04:01:46,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:47,239 INFO L130 PetriNetUnfolder]: 803/1327 cut-off events. [2023-09-01 04:01:47,239 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-09-01 04:01:47,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 1327 events. 803/1327 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6634 event pairs, 672 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 1204. Up to 666 conditions per place. [2023-09-01 04:01:47,252 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-09-01 04:01:47,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 324 flow [2023-09-01 04:01:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-09-01 04:01:47,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2023-09-01 04:01:47,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-09-01 04:01:47,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-09-01 04:01:47,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:47,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-09-01 04:01:47,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:47,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:47,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:47,282 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 92 flow. Second operand 3 states and 532 transitions. [2023-09-01 04:01:47,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 324 flow [2023-09-01 04:01:47,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:01:47,288 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 114 flow [2023-09-01 04:01:47,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-09-01 04:01:47,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-09-01 04:01:47,293 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 114 flow [2023-09-01 04:01:47,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:47,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:47,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:47,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:47,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:47,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 26263, now seen corresponding path program 1 times [2023-09-01 04:01:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371600019] [2023-09-01 04:01:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:47,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:47,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:01:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:01:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:47,595 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:01:47,596 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:01:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:47,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:47,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371600019] [2023-09-01 04:01:47,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371600019] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:47,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123450105] [2023-09-01 04:01:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:47,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-09-01 04:01:47,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:47,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:47,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-09-01 04:01:47,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:47,991 INFO L130 PetriNetUnfolder]: 803/1323 cut-off events. [2023-09-01 04:01:47,991 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:01:47,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 1323 events. 803/1323 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 6725 event pairs, 672 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 1328. Up to 1323 conditions per place. [2023-09-01 04:01:48,000 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 04:01:48,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 190 flow [2023-09-01 04:01:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-09-01 04:01:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420485175202156 [2023-09-01 04:01:48,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-09-01 04:01:48,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-09-01 04:01:48,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:48,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-09-01 04:01:48,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,012 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 114 flow. Second operand 3 states and 492 transitions. [2023-09-01 04:01:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 190 flow [2023-09-01 04:01:48,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:01:48,014 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2023-09-01 04:01:48,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-09-01 04:01:48,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-09-01 04:01:48,017 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2023-09-01 04:01:48,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:48,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:01:48,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:48,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:48,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:48,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 817120, now seen corresponding path program 1 times [2023-09-01 04:01:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:48,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181817842] [2023-09-01 04:01:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:48,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:48,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:48,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:01:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:01:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:48,369 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 04:01:48,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 04:01:48,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:01:48,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:01:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:48,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:48,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:48,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181817842] [2023-09-01 04:01:48,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181817842] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:48,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:48,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185971088] [2023-09-01 04:01:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 371 [2023-09-01 04:01:48,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:48,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 371 [2023-09-01 04:01:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:48,815 INFO L130 PetriNetUnfolder]: 607/1027 cut-off events. [2023-09-01 04:01:48,816 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:01:48,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 1027 events. 607/1027 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5075 event pairs, 504 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 2076. Up to 1027 conditions per place. [2023-09-01 04:01:48,821 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 04:01:48,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 176 flow [2023-09-01 04:01:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-09-01 04:01:48,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44833782569631625 [2023-09-01 04:01:48,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-09-01 04:01:48,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-09-01 04:01:48,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:48,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-09-01 04:01:48,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,831 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 3 states and 499 transitions. [2023-09-01 04:01:48,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 176 flow [2023-09-01 04:01:48,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:48,832 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2023-09-01 04:01:48,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-09-01 04:01:48,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-09-01 04:01:48,834 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2023-09-01 04:01:48,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:48,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:01:48,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:49,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:49,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:49,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash 817119, now seen corresponding path program 1 times [2023-09-01 04:01:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:49,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418395928] [2023-09-01 04:01:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:49,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:49,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:01:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 04:01:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:49,179 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 04:01:49,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 04:01:49,189 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 10 treesize of output 8 [2023-09-01 04:01:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:49,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:01:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:49,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:49,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:49,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418395928] [2023-09-01 04:01:49,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418395928] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:49,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:01:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037594223] [2023-09-01 04:01:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:01:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:01:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:01:49,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 371 [2023-09-01 04:01:49,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:49,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:49,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 371 [2023-09-01 04:01:49,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:49,693 INFO L130 PetriNetUnfolder]: 411/731 cut-off events. [2023-09-01 04:01:49,694 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:01:49,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 731 events. 411/731 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3442 event pairs, 336 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 1484. Up to 731 conditions per place. [2023-09-01 04:01:49,697 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-09-01 04:01:49,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 169 flow [2023-09-01 04:01:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-09-01 04:01:49,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2023-09-01 04:01:49,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-09-01 04:01:49,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-09-01 04:01:49,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:49,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-09-01 04:01:49,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:49,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:49,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:49,704 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 3 states and 497 transitions. [2023-09-01 04:01:49,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 169 flow [2023-09-01 04:01:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:49,706 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 98 flow [2023-09-01 04:01:49,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-09-01 04:01:49,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-09-01 04:01:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 98 flow [2023-09-01 04:01:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:49,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:49,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:01:49,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:49,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:49,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:49,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 816702, now seen corresponding path program 1 times [2023-09-01 04:01:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:49,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741340812] [2023-09-01 04:01:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:49,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:49,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:49,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:49,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:01:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:01:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:50,043 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:01:50,043 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:01:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:50,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:50,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741340812] [2023-09-01 04:01:50,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741340812] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:50,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:50,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:01:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732588872] [2023-09-01 04:01:50,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:01:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:01:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:01:51,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 371 [2023-09-01 04:01:51,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:51,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:51,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 371 [2023-09-01 04:01:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:52,189 INFO L130 PetriNetUnfolder]: 620/1103 cut-off events. [2023-09-01 04:01:52,189 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 04:01:52,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 1103 events. 620/1103 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5647 event pairs, 504 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 2245. Up to 367 conditions per place. [2023-09-01 04:01:52,194 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-09-01 04:01:52,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 101 transitions, 456 flow [2023-09-01 04:01:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:01:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:01:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-09-01 04:01:52,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281221922731357 [2023-09-01 04:01:52,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-09-01 04:01:52,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-09-01 04:01:52,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:52,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-09-01 04:01:52,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,207 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,208 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 98 flow. Second operand 6 states and 953 transitions. [2023-09-01 04:01:52,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 101 transitions, 456 flow [2023-09-01 04:01:52,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 101 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:52,210 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 210 flow [2023-09-01 04:01:52,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-09-01 04:01:52,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-09-01 04:01:52,211 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 210 flow [2023-09-01 04:01:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:52,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:01:52,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:52,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:52,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 785272852, now seen corresponding path program 1 times [2023-09-01 04:01:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743208579] [2023-09-01 04:01:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:52,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:52,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:52,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:52,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:01:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:01:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:52,542 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 04:01:52,543 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-09-01 04:01:52,554 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 [2023-09-01 04:01:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:52,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:01:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:52,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:52,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743208579] [2023-09-01 04:01:52,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743208579] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:01:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757413604] [2023-09-01 04:01:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:52,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:01:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:01:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:01:52,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 371 [2023-09-01 04:01:52,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:52,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 371 [2023-09-01 04:01:52,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:53,063 INFO L130 PetriNetUnfolder]: 578/1019 cut-off events. [2023-09-01 04:01:53,063 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 04:01:53,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 1019 events. 578/1019 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5222 event pairs, 468 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 2117. Up to 1019 conditions per place. [2023-09-01 04:01:53,068 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-09-01 04:01:53,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 296 flow [2023-09-01 04:01:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-09-01 04:01:53,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2023-09-01 04:01:53,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-09-01 04:01:53,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-09-01 04:01:53,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:53,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-09-01 04:01:53,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,076 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 210 flow. Second operand 3 states and 489 transitions. [2023-09-01 04:01:53,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 296 flow [2023-09-01 04:01:53,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:53,079 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2023-09-01 04:01:53,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-09-01 04:01:53,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-09-01 04:01:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2023-09-01 04:01:53,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:53,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:01:53,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:53,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:53,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:53,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 785272851, now seen corresponding path program 1 times [2023-09-01 04:01:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894247587] [2023-09-01 04:01:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:53,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:53,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:53,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:01:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:01:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:53,410 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:01:53,411 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-09-01 04:01:53,443 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:01:53,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:01:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:53,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:53,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894247587] [2023-09-01 04:01:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894247587] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:53,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847112810] [2023-09-01 04:01:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:53,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 371 [2023-09-01 04:01:53,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 3 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) [2023-09-01 04:01:53,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:53,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 371 [2023-09-01 04:01:53,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:53,712 INFO L130 PetriNetUnfolder]: 536/935 cut-off events. [2023-09-01 04:01:53,712 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 04:01:53,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 935 events. 536/935 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4650 event pairs, 432 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1939. Up to 935 conditions per place. [2023-09-01 04:01:53,717 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 04:01:53,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 271 flow [2023-09-01 04:01:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-09-01 04:01:53,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43755615453728663 [2023-09-01 04:01:53,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-09-01 04:01:53,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-09-01 04:01:53,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:53,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-09-01 04:01:53,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:53,723 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 487 transitions. [2023-09-01 04:01:53,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 271 flow [2023-09-01 04:01:53,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:53,725 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2023-09-01 04:01:53,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-09-01 04:01:53,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-09-01 04:01:53,726 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2023-09-01 04:01:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 04:01:53,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:53,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:01:53,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-09-01 04:01:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:53,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:53,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 785272764, now seen corresponding path program 1 times [2023-09-01 04:01:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:53,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491413279] [2023-09-01 04:01:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:53,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:53,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:53,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:53,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:01:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:01:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:54,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 04:01:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:54,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:54,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491413279] [2023-09-01 04:01:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491413279] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:54,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:54,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:01:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493616460] [2023-09-01 04:01:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:01:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:01:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:01:54,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-09-01 04:01:54,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:54,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-09-01 04:01:54,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:54,322 INFO L130 PetriNetUnfolder]: 407/716 cut-off events. [2023-09-01 04:01:54,322 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 04:01:54,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 716 events. 407/716 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3332 event pairs, 315 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1498. Up to 698 conditions per place. [2023-09-01 04:01:54,326 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 37 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-09-01 04:01:54,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 264 flow [2023-09-01 04:01:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:01:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:01:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-09-01 04:01:54,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211590296495957 [2023-09-01 04:01:54,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-09-01 04:01:54,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-09-01 04:01:54,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:54,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-09-01 04:01:54,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,333 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,333 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 4 states and 625 transitions. [2023-09-01 04:01:54,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 264 flow [2023-09-01 04:01:54,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:54,335 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 189 flow [2023-09-01 04:01:54,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-09-01 04:01:54,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-09-01 04:01:54,335 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 189 flow [2023-09-01 04:01:54,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:54,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:01:54,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:54,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:54,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 785272765, now seen corresponding path program 1 times [2023-09-01 04:01:54,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:54,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071827780] [2023-09-01 04:01:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:54,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:54,550 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 (10)] Waiting until timeout for monitored process [2023-09-01 04:01:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 04:01:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:54,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:54,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071827780] [2023-09-01 04:01:54,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071827780] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:54,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:54,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:01:54,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981483170] [2023-09-01 04:01:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:54,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:01:54,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:01:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:01:54,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-09-01 04:01:54,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:54,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-09-01 04:01:54,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:54,960 INFO L130 PetriNetUnfolder]: 301/548 cut-off events. [2023-09-01 04:01:54,960 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:01:54,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 548 events. 301/548 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2448 event pairs, 237 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1163. Up to 480 conditions per place. [2023-09-01 04:01:54,964 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-09-01 04:01:54,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 337 flow [2023-09-01 04:01:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:01:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:01:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-09-01 04:01:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380053908355795 [2023-09-01 04:01:54,967 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-09-01 04:01:54,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-09-01 04:01:54,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:54,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-09-01 04:01:54,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,971 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,971 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 189 flow. Second operand 4 states and 650 transitions. [2023-09-01 04:01:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 337 flow [2023-09-01 04:01:54,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:01:54,973 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 223 flow [2023-09-01 04:01:54,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=4, PETRI_FLOW=223, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-09-01 04:01:54,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-09-01 04:01:54,974 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 223 flow [2023-09-01 04:01:54,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:54,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:54,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:01:54,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:55,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:01:55,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:55,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1426314658, now seen corresponding path program 1 times [2023-09-01 04:01:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:55,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620515467] [2023-09-01 04:01:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:55,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:55,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:55,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:01:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:01:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:55,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:01:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:55,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:55,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:55,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620515467] [2023-09-01 04:01:55,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620515467] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:55,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:55,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 04:01:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525378825] [2023-09-01 04:01:55,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:55,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:01:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:55,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:01:55,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:01:57,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 371 [2023-09-01 04:01:57,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:57,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:57,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 371 [2023-09-01 04:01:57,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:00,094 INFO L130 PetriNetUnfolder]: 359/653 cut-off events. [2023-09-01 04:02:00,094 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-09-01 04:02:00,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 653 events. 359/653 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2847 event pairs, 276 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1493. Up to 241 conditions per place. [2023-09-01 04:02:00,108 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 76 selfloop transitions, 15 changer transitions 1/92 dead transitions. [2023-09-01 04:02:00,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 92 transitions, 534 flow [2023-09-01 04:02:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:02:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:02:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1321 transitions. [2023-09-01 04:02:00,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39562743336328243 [2023-09-01 04:02:00,114 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1321 transitions. [2023-09-01 04:02:00,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1321 transitions. [2023-09-01 04:02:00,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:00,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1321 transitions. [2023-09-01 04:02:00,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.77777777777777) internal successors, (1321), 9 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:00,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 371.0) internal successors, (3710), 10 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:00,122 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 371.0) internal successors, (3710), 10 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:00,122 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 223 flow. Second operand 9 states and 1321 transitions. [2023-09-01 04:02:00,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 92 transitions, 534 flow [2023-09-01 04:02:00,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 522 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 04:02:00,125 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 261 flow [2023-09-01 04:02:00,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-09-01 04:02:00,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-09-01 04:02:00,125 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 261 flow [2023-09-01 04:02:00,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:00,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:00,126 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:02:00,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:00,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:00,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1436934120, now seen corresponding path program 2 times [2023-09-01 04:02:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889697529] [2023-09-01 04:02:00,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:02:00,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:00,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:00,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:00,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:02:00,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:02:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:02:00,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:02:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:00,466 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:02:00,466 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:02:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:00,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:02:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:01,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889697529] [2023-09-01 04:02:01,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889697529] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:02:01,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:02:01,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:02:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867995872] [2023-09-01 04:02:01,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:02:01,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:02:01,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:02:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:02:03,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 371 [2023-09-01 04:02:03,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 261 flow. Second operand has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:03,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:03,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 371 [2023-09-01 04:02:03,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:07,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:09,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:10,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:12,410 INFO L130 PetriNetUnfolder]: 860/1534 cut-off events. [2023-09-01 04:02:12,411 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-09-01 04:02:12,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 1534 events. 860/1534 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8045 event pairs, 663 based on Foata normal form. 10/1066 useless extension candidates. Maximal degree in co-relation 3765. Up to 297 conditions per place. [2023-09-01 04:02:12,419 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 159 selfloop transitions, 30 changer transitions 1/190 dead transitions. [2023-09-01 04:02:12,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 190 transitions, 1131 flow [2023-09-01 04:02:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:02:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:02:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1916 transitions. [2023-09-01 04:02:12,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303683737646002 [2023-09-01 04:02:12,431 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1916 transitions. [2023-09-01 04:02:12,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1916 transitions. [2023-09-01 04:02:12,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:12,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1916 transitions. [2023-09-01 04:02:12,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:12,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:12,446 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:12,446 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 261 flow. Second operand 12 states and 1916 transitions. [2023-09-01 04:02:12,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 190 transitions, 1131 flow [2023-09-01 04:02:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 190 transitions, 1074 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 04:02:12,457 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 452 flow [2023-09-01 04:02:12,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=452, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-09-01 04:02:12,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2023-09-01 04:02:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 452 flow [2023-09-01 04:02:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:12,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:02:12,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:12,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:12,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1266080824, now seen corresponding path program 1 times [2023-09-01 04:02:12,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:12,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873159761] [2023-09-01 04:02:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:12,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:12,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:12,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:12,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:02:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:02:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:02:12,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:12,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873159761] [2023-09-01 04:02:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873159761] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:12,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:12,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:02:12,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515142] [2023-09-01 04:02:12,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:02:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:02:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:02:12,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 371 [2023-09-01 04:02:12,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:12,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:12,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 371 [2023-09-01 04:02:12,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:13,094 INFO L130 PetriNetUnfolder]: 1118/2034 cut-off events. [2023-09-01 04:02:13,095 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-09-01 04:02:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4961 conditions, 2034 events. 1118/2034 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11694 event pairs, 428 based on Foata normal form. 70/1462 useless extension candidates. Maximal degree in co-relation 4933. Up to 1342 conditions per place. [2023-09-01 04:02:13,116 INFO L137 encePairwiseOnDemand]: 366/371 looper letters, 70 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-09-01 04:02:13,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 630 flow [2023-09-01 04:02:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:02:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:02:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-09-01 04:02:13,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2023-09-01 04:02:13,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-09-01 04:02:13,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-09-01 04:02:13,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:13,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-09-01 04:02:13,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,122 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 452 flow. Second operand 3 states and 513 transitions. [2023-09-01 04:02:13,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 630 flow [2023-09-01 04:02:13,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 567 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-09-01 04:02:13,127 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 405 flow [2023-09-01 04:02:13,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=405, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-09-01 04:02:13,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2023-09-01 04:02:13,128 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 405 flow [2023-09-01 04:02:13,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:13,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:02:13,145 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 (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:13,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:13,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:13,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1267015808, now seen corresponding path program 1 times [2023-09-01 04:02:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384198872] [2023-09-01 04:02:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:13,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:13,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:13,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:13,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:02:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 04:02:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:13,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:13,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384198872] [2023-09-01 04:02:13,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384198872] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:13,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:13,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:02:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15417972] [2023-09-01 04:02:13,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:13,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:02:13,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:02:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:02:13,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 371 [2023-09-01 04:02:13,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:13,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 371 [2023-09-01 04:02:13,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:14,051 INFO L130 PetriNetUnfolder]: 1257/2401 cut-off events. [2023-09-01 04:02:14,052 INFO L131 PetriNetUnfolder]: For 1386/1386 co-relation queries the response was YES. [2023-09-01 04:02:14,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6328 conditions, 2401 events. 1257/2401 cut-off events. For 1386/1386 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14748 event pairs, 1073 based on Foata normal form. 70/1991 useless extension candidates. Maximal degree in co-relation 6298. Up to 2033 conditions per place. [2023-09-01 04:02:14,065 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 85 selfloop transitions, 3 changer transitions 1/89 dead transitions. [2023-09-01 04:02:14,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 748 flow [2023-09-01 04:02:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:02:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:02:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 651 transitions. [2023-09-01 04:02:14,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386792452830189 [2023-09-01 04:02:14,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 651 transitions. [2023-09-01 04:02:14,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 651 transitions. [2023-09-01 04:02:14,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:14,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 651 transitions. [2023-09-01 04:02:14,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,072 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 405 flow. Second operand 4 states and 651 transitions. [2023-09-01 04:02:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 748 flow [2023-09-01 04:02:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:02:14,080 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 416 flow [2023-09-01 04:02:14,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-09-01 04:02:14,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2023-09-01 04:02:14,082 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 416 flow [2023-09-01 04:02:14,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:14,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:02:14,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:14,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:14,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1880840295, now seen corresponding path program 1 times [2023-09-01 04:02:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:14,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977414940] [2023-09-01 04:02:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:14,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:14,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:14,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:02:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:02:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:14,430 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:02:14,430 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:02:14,453 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:02:14,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:02:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:02:14,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:14,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:14,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977414940] [2023-09-01 04:02:14,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977414940] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:14,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:14,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:02:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056006310] [2023-09-01 04:02:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:14,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:02:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:02:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:02:14,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-09-01 04:02:14,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:14,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-09-01 04:02:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:14,973 INFO L130 PetriNetUnfolder]: 949/1867 cut-off events. [2023-09-01 04:02:14,973 INFO L131 PetriNetUnfolder]: For 1295/1295 co-relation queries the response was YES. [2023-09-01 04:02:14,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 1867 events. 949/1867 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11139 event pairs, 793 based on Foata normal form. 0/1803 useless extension candidates. Maximal degree in co-relation 5146. Up to 1854 conditions per place. [2023-09-01 04:02:14,987 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 47 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2023-09-01 04:02:14,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 526 flow [2023-09-01 04:02:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:02:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:02:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-09-01 04:02:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419811320754717 [2023-09-01 04:02:15,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-09-01 04:02:15,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-09-01 04:02:15,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:15,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-09-01 04:02:15,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:15,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:15,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:15,028 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 416 flow. Second operand 4 states and 623 transitions. [2023-09-01 04:02:15,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 526 flow [2023-09-01 04:02:15,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 507 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 04:02:15,047 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 413 flow [2023-09-01 04:02:15,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2023-09-01 04:02:15,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2023-09-01 04:02:15,049 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 413 flow [2023-09-01 04:02:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:15,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:15,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:02:15,067 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 [2023-09-01 04:02:15,267 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 [2023-09-01 04:02:15,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:15,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1880840294, now seen corresponding path program 1 times [2023-09-01 04:02:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881696099] [2023-09-01 04:02:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:15,270 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) [2023-09-01 04:02:15,272 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 [2023-09-01 04:02:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 04:02:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:15,441 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:02:15,442 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:02:15,497 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:02:15,497 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:02:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:15,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:02:15,668 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:02:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:02:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:15,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:02:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:19,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:19,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881696099] [2023-09-01 04:02:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881696099] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:02:19,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:02:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:02:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716327464] [2023-09-01 04:02:19,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:02:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:02:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:02:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:02:22,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:02:26,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:02:28,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 371 [2023-09-01 04:02:28,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:28,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:28,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 371 [2023-09-01 04:02:28,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:48,665 INFO L130 PetriNetUnfolder]: 2013/3891 cut-off events. [2023-09-01 04:02:48,665 INFO L131 PetriNetUnfolder]: For 3023/3023 co-relation queries the response was YES. [2023-09-01 04:02:48,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10798 conditions, 3891 events. 2013/3891 cut-off events. For 3023/3023 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 26087 event pairs, 1627 based on Foata normal form. 268/4095 useless extension candidates. Maximal degree in co-relation 10766. Up to 1466 conditions per place. [2023-09-01 04:02:48,682 INFO L137 encePairwiseOnDemand]: 362/371 looper letters, 119 selfloop transitions, 35 changer transitions 1/155 dead transitions. [2023-09-01 04:02:48,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 155 transitions, 1201 flow [2023-09-01 04:02:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 04:02:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 04:02:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2105 transitions. [2023-09-01 04:02:48,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782569631626235 [2023-09-01 04:02:48,688 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2105 transitions. [2023-09-01 04:02:48,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2105 transitions. [2023-09-01 04:02:48,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:48,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2105 transitions. [2023-09-01 04:02:48,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 140.33333333333334) internal successors, (2105), 15 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:48,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:48,701 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 371.0) internal successors, (5936), 16 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:48,701 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 413 flow. Second operand 15 states and 2105 transitions. [2023-09-01 04:02:48,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 155 transitions, 1201 flow [2023-09-01 04:02:48,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 155 transitions, 1188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:02:48,711 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 694 flow [2023-09-01 04:02:48,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=694, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-09-01 04:02:48,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2023-09-01 04:02:48,712 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 694 flow [2023-09-01 04:02:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:48,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:48,713 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 04:02:48,725 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 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:48,922 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 [2023-09-01 04:02:48,922 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:48,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1195347971, now seen corresponding path program 2 times [2023-09-01 04:02:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:48,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552412819] [2023-09-01 04:02:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:02:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:48,924 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) [2023-09-01 04:02:48,927 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 [2023-09-01 04:02:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:02:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:02:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 04:02:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:49,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:02:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 04:02:49,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:49,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:49,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552412819] [2023-09-01 04:02:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552412819] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:49,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:02:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181481273] [2023-09-01 04:02:49,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:49,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:02:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:02:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:02:49,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 371 [2023-09-01 04:02:49,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:49,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:49,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 371 [2023-09-01 04:02:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:49,937 INFO L130 PetriNetUnfolder]: 1581/3147 cut-off events. [2023-09-01 04:02:49,937 INFO L131 PetriNetUnfolder]: For 4086/4086 co-relation queries the response was YES. [2023-09-01 04:02:49,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8788 conditions, 3147 events. 1581/3147 cut-off events. For 4086/4086 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20848 event pairs, 1243 based on Foata normal form. 288/3435 useless extension candidates. Maximal degree in co-relation 8748. Up to 3083 conditions per place. [2023-09-01 04:02:49,952 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 46 selfloop transitions, 30 changer transitions 0/76 dead transitions. [2023-09-01 04:02:49,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 830 flow [2023-09-01 04:02:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:02:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:02:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-09-01 04:02:49,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41846361185983827 [2023-09-01 04:02:49,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-09-01 04:02:49,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-09-01 04:02:49,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:49,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-09-01 04:02:49,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:49,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:49,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:49,960 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 694 flow. Second operand 4 states and 621 transitions. [2023-09-01 04:02:49,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 830 flow [2023-09-01 04:02:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 795 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-09-01 04:02:49,970 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 703 flow [2023-09-01 04:02:49,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-09-01 04:02:49,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2023-09-01 04:02:49,970 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 703 flow [2023-09-01 04:02:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:49,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:49,971 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-09-01 04:02:49,980 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 [2023-09-01 04:02:50,179 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 [2023-09-01 04:02:50,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:02:50,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1972062162, now seen corresponding path program 1 times [2023-09-01 04:02:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:50,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790903411] [2023-09-01 04:02:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:50,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:50,181 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) [2023-09-01 04:02:50,182 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 [2023-09-01 04:02:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:02:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:50,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:02:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:50,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:02:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:52,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:52,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790903411] [2023-09-01 04:02:52,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790903411] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:02:52,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:02:52,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 04:02:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117294018] [2023-09-01 04:02:52,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:02:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 04:02:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 04:02:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-09-01 04:03:03,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 371 [2023-09-01 04:03:03,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 703 flow. Second operand has 20 states, 20 states have (on average 144.05) internal successors, (2881), 20 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:03,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:03,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 371 [2023-09-01 04:03:03,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:09,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:11,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:13,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:15,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:17,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:19,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:21,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:23,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:25,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:29,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:30,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:34,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:35,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:03:45,975 INFO L130 PetriNetUnfolder]: 3737/7372 cut-off events. [2023-09-01 04:03:45,976 INFO L131 PetriNetUnfolder]: For 8471/8471 co-relation queries the response was YES. [2023-09-01 04:03:45,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20515 conditions, 7372 events. 3737/7372 cut-off events. For 8471/8471 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 52836 event pairs, 2933 based on Foata normal form. 43/7415 useless extension candidates. Maximal degree in co-relation 20477. Up to 1345 conditions per place. [2023-09-01 04:03:46,012 INFO L137 encePairwiseOnDemand]: 364/371 looper letters, 365 selfloop transitions, 58 changer transitions 1/424 dead transitions. [2023-09-01 04:03:46,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 424 transitions, 3431 flow [2023-09-01 04:03:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:03:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:03:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3807 transitions. [2023-09-01 04:03:46,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275606469002695 [2023-09-01 04:03:46,024 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3807 transitions. [2023-09-01 04:03:46,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3807 transitions. [2023-09-01 04:03:46,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:46,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3807 transitions. [2023-09-01 04:03:46,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 158.625) internal successors, (3807), 24 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 371.0) internal successors, (9275), 25 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,045 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 371.0) internal successors, (9275), 25 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,045 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 703 flow. Second operand 24 states and 3807 transitions. [2023-09-01 04:03:46,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 424 transitions, 3431 flow [2023-09-01 04:03:46,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 424 transitions, 3339 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:03:46,072 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 1089 flow [2023-09-01 04:03:46,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1089, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2023-09-01 04:03:46,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2023-09-01 04:03:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 1089 flow [2023-09-01 04:03:46,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.05) internal successors, (2881), 20 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:46,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:46,087 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 (18)] Ended with exit code 0 [2023-09-01 04:03:46,284 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 [2023-09-01 04:03:46,285 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:03:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 616109568, now seen corresponding path program 2 times [2023-09-01 04:03:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:46,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184706173] [2023-09-01 04:03:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:03:46,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:46,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:46,287 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) [2023-09-01 04:03:46,290 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 [2023-09-01 04:03:46,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:03:46,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:03:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:03:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:46,537 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:03:46,538 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:03:46,613 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:03:46,614 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:03:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:03:46,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:03:46,751 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:03:46,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:03:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 04:03:46,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:46,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184706173] [2023-09-01 04:03:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184706173] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:03:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089628868] [2023-09-01 04:03:46,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:03:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:03:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:03:47,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 371 [2023-09-01 04:03:47,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 1089 flow. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:47,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:47,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 371 [2023-09-01 04:03:47,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:48,078 INFO L130 PetriNetUnfolder]: 3187/6408 cut-off events. [2023-09-01 04:03:48,078 INFO L131 PetriNetUnfolder]: For 6677/6677 co-relation queries the response was YES. [2023-09-01 04:03:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16881 conditions, 6408 events. 3187/6408 cut-off events. For 6677/6677 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 45798 event pairs, 2451 based on Foata normal form. 380/6788 useless extension candidates. Maximal degree in co-relation 16830. Up to 6386 conditions per place. [2023-09-01 04:03:48,112 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 81 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2023-09-01 04:03:48,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 99 transitions, 1267 flow [2023-09-01 04:03:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:03:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:03:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-09-01 04:03:48,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063342318059299 [2023-09-01 04:03:48,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-09-01 04:03:48,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-09-01 04:03:48,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:48,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-09-01 04:03:48,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:48,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:48,119 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:48,119 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 1089 flow. Second operand 4 states and 603 transitions. [2023-09-01 04:03:48,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 99 transitions, 1267 flow [2023-09-01 04:03:48,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 1167 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-09-01 04:03:48,137 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 1005 flow [2023-09-01 04:03:48,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1005, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2023-09-01 04:03:48,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2023-09-01 04:03:48,138 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 1005 flow [2023-09-01 04:03:48,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:48,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:48,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:48,149 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 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:03:48,347 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 [2023-09-01 04:03:48,348 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:03:48,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash -736099882, now seen corresponding path program 1 times [2023-09-01 04:03:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375926519] [2023-09-01 04:03:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:48,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:48,350 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) [2023-09-01 04:03:48,353 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 [2023-09-01 04:03:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:03:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:48,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:48,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375926519] [2023-09-01 04:03:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375926519] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:48,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:03:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143367569] [2023-09-01 04:03:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:03:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:03:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:03:48,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 371 [2023-09-01 04:03:48,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 1005 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:48,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:48,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 371 [2023-09-01 04:03:48,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:49,459 INFO L130 PetriNetUnfolder]: 3536/6895 cut-off events. [2023-09-01 04:03:49,460 INFO L131 PetriNetUnfolder]: For 3931/3931 co-relation queries the response was YES. [2023-09-01 04:03:49,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18181 conditions, 6895 events. 3536/6895 cut-off events. For 3931/3931 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 48190 event pairs, 1446 based on Foata normal form. 68/6963 useless extension candidates. Maximal degree in co-relation 18131. Up to 3583 conditions per place. [2023-09-01 04:03:49,489 INFO L137 encePairwiseOnDemand]: 367/371 looper letters, 99 selfloop transitions, 3 changer transitions 6/108 dead transitions. [2023-09-01 04:03:49,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 1247 flow [2023-09-01 04:03:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:03:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:03:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-09-01 04:03:49,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573225516621743 [2023-09-01 04:03:49,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-09-01 04:03:49,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-09-01 04:03:49,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:49,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-09-01 04:03:49,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:49,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:49,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:49,494 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 1005 flow. Second operand 3 states and 509 transitions. [2023-09-01 04:03:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 1247 flow [2023-09-01 04:03:49,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 108 transitions, 1228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:03:49,508 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 965 flow [2023-09-01 04:03:49,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=965, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2023-09-01 04:03:49,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2023-09-01 04:03:49,509 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 965 flow [2023-09-01 04:03:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:49,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:49,509 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-09-01 04:03:49,518 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 [2023-09-01 04:03:49,718 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 [2023-09-01 04:03:49,718 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:03:49,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1739425406, now seen corresponding path program 3 times [2023-09-01 04:03:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96993890] [2023-09-01 04:03:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:03:49,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:49,720 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) [2023-09-01 04:03:49,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:03:49,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-09-01 04:03:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:03:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:03:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:49,981 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:03:49,981 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:03:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:50,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:03:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:53,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96993890] [2023-09-01 04:03:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96993890] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:03:54,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:03:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-09-01 04:03:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100302540] [2023-09-01 04:03:54,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:03:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 04:03:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 04:03:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-09-01 04:04:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 371 [2023-09-01 04:04:15,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 965 flow. Second operand has 26 states, 26 states have (on average 144.0) internal successors, (3744), 26 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:15,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:04:15,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 371 [2023-09-01 04:04:15,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:04:28,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:29,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:31,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:33,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:35,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:37,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:39,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:41,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:43,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:45,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:04:47,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:05:01,975 INFO L130 PetriNetUnfolder]: 3687/7135 cut-off events. [2023-09-01 04:05:01,975 INFO L131 PetriNetUnfolder]: For 6258/6258 co-relation queries the response was YES. [2023-09-01 04:05:01,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20576 conditions, 7135 events. 3687/7135 cut-off events. For 6258/6258 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 50859 event pairs, 2535 based on Foata normal form. 11/7146 useless extension candidates. Maximal degree in co-relation 20525. Up to 2079 conditions per place. [2023-09-01 04:05:02,008 INFO L137 encePairwiseOnDemand]: 365/371 looper letters, 271 selfloop transitions, 73 changer transitions 0/344 dead transitions. [2023-09-01 04:05:02,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 344 transitions, 2958 flow [2023-09-01 04:05:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 04:05:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 04:05:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3993 transitions. [2023-09-01 04:05:02,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41395397055774413 [2023-09-01 04:05:02,015 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3993 transitions. [2023-09-01 04:05:02,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3993 transitions. [2023-09-01 04:05:02,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:05:02,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3993 transitions. [2023-09-01 04:05:02,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 153.57692307692307) internal successors, (3993), 26 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:02,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 371.0) internal successors, (10017), 27 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:02,031 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 371.0) internal successors, (10017), 27 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:02,031 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 965 flow. Second operand 26 states and 3993 transitions. [2023-09-01 04:05:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 344 transitions, 2958 flow [2023-09-01 04:05:02,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 344 transitions, 2881 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 04:05:02,051 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 1348 flow [2023-09-01 04:05:02,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1348, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2023-09-01 04:05:02,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2023-09-01 04:05:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 1348 flow [2023-09-01 04:05:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 144.0) internal successors, (3744), 26 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:02,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:05:02,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:05:02,066 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 [2023-09-01 04:05:02,263 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 [2023-09-01 04:05:02,264 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:05:02,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:05:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 721526987, now seen corresponding path program 1 times [2023-09-01 04:05:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:05:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105838647] [2023-09-01 04:05:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:05:02,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:05:02,266 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) [2023-09-01 04:05:02,267 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 [2023-09-01 04:05:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:05:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:05:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:05:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:05:02,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:05:02,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:05:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105838647] [2023-09-01 04:05:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105838647] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:05:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:05:02,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:05:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493221717] [2023-09-01 04:05:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:05:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:05:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:05:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:05:02,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:05:02,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 371 [2023-09-01 04:05:02,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 1348 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:02,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:05:02,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 371 [2023-09-01 04:05:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:05:03,455 INFO L130 PetriNetUnfolder]: 3381/6829 cut-off events. [2023-09-01 04:05:03,455 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-09-01 04:05:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19005 conditions, 6829 events. 3381/6829 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 50092 event pairs, 1215 based on Foata normal form. 306/7135 useless extension candidates. Maximal degree in co-relation 18943. Up to 4273 conditions per place. [2023-09-01 04:05:03,490 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 119 selfloop transitions, 2 changer transitions 5/126 dead transitions. [2023-09-01 04:05:03,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 126 transitions, 1629 flow [2023-09-01 04:05:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:05:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:05:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-09-01 04:05:03,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519317160826595 [2023-09-01 04:05:03,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-09-01 04:05:03,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-09-01 04:05:03,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:05:03,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-09-01 04:05:03,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:03,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:03,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:03,494 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 1348 flow. Second operand 3 states and 503 transitions. [2023-09-01 04:05:03,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 126 transitions, 1629 flow [2023-09-01 04:05:03,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 126 transitions, 1479 flow, removed 26 selfloop flow, removed 14 redundant places. [2023-09-01 04:05:03,508 INFO L231 Difference]: Finished difference. Result has 136 places, 117 transitions, 1212 flow [2023-09-01 04:05:03,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1212, PETRI_PLACES=136, PETRI_TRANSITIONS=117} [2023-09-01 04:05:03,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2023-09-01 04:05:03,509 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 117 transitions, 1212 flow [2023-09-01 04:05:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:03,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:05:03,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:05:03,516 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 [2023-09-01 04:05:03,709 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 [2023-09-01 04:05:03,710 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-09-01 04:05:03,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:05:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash 656235383, now seen corresponding path program 1 times [2023-09-01 04:05:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:05:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303347437] [2023-09-01 04:05:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:05:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:05:03,711 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) [2023-09-01 04:05:03,729 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 [2023-09-01 04:05:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:05:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:05:03,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:05:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:05:05,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:05:13,175 WARN L222 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 392 DAG size of output: 285 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 04:05:13,178 INFO L321 Elim1Store]: treesize reduction 397, result has 76.6 percent of original size [2023-09-01 04:05:13,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 176 treesize of output 1335 Killed by 15