./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:28:46,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:28:46,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:28:46,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:28:46,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:28:46,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:28:46,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:28:46,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:28:46,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:28:46,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:28:46,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:28:46,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:28:46,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:28:46,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:28:46,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:28:46,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:28:46,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:28:46,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:28:46,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:28:46,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:28:46,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:28:46,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:28:46,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:28:46,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:28:46,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:28:46,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:28:46,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:28:46,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:28:46,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:28:46,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:28:46,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:28:46,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:28:46,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:28:46,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:28:46,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:28:46,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:28:46,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:28:46,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:28:46,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:28:46,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:28:46,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:28:46,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:28:46,183 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:28:46,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:28:46,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:28:46,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:28:46,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:28:46,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:28:46,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:28:46,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:28:46,187 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:28:46,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:28:46,187 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:28:46,188 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:28:46,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:28:46,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:28:46,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:28:46,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:28:46,189 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:28:46,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:28:46,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:28:46,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:28:46,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:28:46,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:28:46,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:28:46,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:28:46,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:28:46,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:28:46,191 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:28:46,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:28:46,192 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:28:46,192 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:28:46,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:28:46,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:28:46,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:28:46,505 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:28:46,505 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:28:46,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 06:28:47,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:28:47,796 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:28:47,796 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 06:28:47,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5aa59587/6b0d11ae76424236a8588b212abfbc1a/FLAGa66d42329 [2023-08-30 06:28:47,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5aa59587/6b0d11ae76424236a8588b212abfbc1a [2023-08-30 06:28:47,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:28:47,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:28:47,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:28:47,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:28:47,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:28:47,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:28:47" (1/1) ... [2023-08-30 06:28:47,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4d8b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:47, skipping insertion in model container [2023-08-30 06:28:47,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:28:47" (1/1) ... [2023-08-30 06:28:47,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:28:47,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:28:48,062 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 06:28:48,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:28:48,084 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:28:48,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@363c6f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:48, skipping insertion in model container [2023-08-30 06:28:48,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:28:48,087 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:28:48,089 INFO L158 Benchmark]: Toolchain (without parser) took 263.21ms. Allocated memory is still 67.1MB. Free memory was 44.4MB in the beginning and 34.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:28:48,090 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:28:48,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.71ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 34.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:28:48,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.71ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 34.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 143]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:28:49,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:28:49,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:28:49,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:28:49,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:28:49,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:28:49,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:28:49,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:28:49,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:28:49,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:28:49,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:28:49,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:28:49,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:28:49,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:28:49,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:28:49,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:28:49,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:28:49,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:28:49,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:28:49,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:28:49,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:28:49,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:28:49,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:28:49,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:28:49,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:28:49,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:28:49,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:28:49,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:28:49,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:28:49,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:28:49,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:28:49,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:28:49,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:28:49,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:28:49,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:28:49,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:28:49,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:28:49,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:28:49,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:28:49,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:28:49,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:28:49,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:28:49,946 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:28:49,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:28:49,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:28:49,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:28:49,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:28:49,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:28:49,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:28:49,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:28:49,950 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:28:49,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:28:49,951 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:28:49,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:28:49,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:28:49,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:28:49,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:28:49,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:28:49,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:28:49,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:28:49,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:28:49,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:28:49,953 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:28:49,953 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:28:49,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:28:49,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:28:49,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:28:49,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:28:49,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:28:49,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:28:49,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:28:49,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:28:49,954 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:28:49,955 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:28:49,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:28:49,955 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:28:49,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:28:49,956 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:28:49,956 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:28:49,956 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:28:50,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:28:50,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:28:50,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:28:50,244 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:28:50,245 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:28:50,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 06:28:51,444 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:28:51,676 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:28:51,676 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c [2023-08-30 06:28:51,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb90b011/9ee5af000997485a9019a81a1c7d0046/FLAG879cbe16a [2023-08-30 06:28:51,697 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb90b011/9ee5af000997485a9019a81a1c7d0046 [2023-08-30 06:28:51,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:28:51,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:28:51,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:28:51,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:28:51,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:28:51,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:28:51" (1/1) ... [2023-08-30 06:28:51,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b873ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:51, skipping insertion in model container [2023-08-30 06:28:51,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:28:51" (1/1) ... [2023-08-30 06:28:51,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:28:51,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:28:51,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 06:28:51,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:28:51,918 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:28:51,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:28:51,938 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 06:28:51,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:28:51,960 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:28:51,995 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2023-08-30 06:28:51,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:28:52,006 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:28:52,006 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:28:52,012 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:28:52,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52 WrapperNode [2023-08-30 06:28:52,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:28:52,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:28:52,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:28:52,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:28:52,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,068 INFO L138 Inliner]: procedures = 29, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-08-30 06:28:52,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:28:52,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:28:52,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:28:52,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:28:52,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,130 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:28:52,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:28:52,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:28:52,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:28:52,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (1/1) ... [2023-08-30 06:28:52,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:28:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:28:52,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:28:52,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:28:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:28:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:28:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:28:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:28:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:28:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:28:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:28:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:28:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:28:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:28:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:28:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:28:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 06:28:52,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 06:28:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:28:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:28:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:28:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:28:52,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:28:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:28:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:28:52,213 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:28:52,348 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:28:52,350 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:28:52,995 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:28:53,199 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:28:53,199 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 06:28:53,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:28:53 BoogieIcfgContainer [2023-08-30 06:28:53,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:28:53,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:28:53,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:28:53,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:28:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:28:51" (1/3) ... [2023-08-30 06:28:53,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b49440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:28:53, skipping insertion in model container [2023-08-30 06:28:53,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:28:52" (2/3) ... [2023-08-30 06:28:53,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b49440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:28:53, skipping insertion in model container [2023-08-30 06:28:53,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:28:53" (3/3) ... [2023-08-30 06:28:53,212 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2023-08-30 06:28:53,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:28:53,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-08-30 06:28:53,227 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:28:53,327 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 06:28:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 233 transitions, 506 flow [2023-08-30 06:28:53,475 INFO L130 PetriNetUnfolder]: 14/228 cut-off events. [2023-08-30 06:28:53,476 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:28:53,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 14/228 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 355 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-08-30 06:28:53,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 233 transitions, 506 flow [2023-08-30 06:28:53,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 224 transitions, 478 flow [2023-08-30 06:28:53,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:28:53,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 224 transitions, 478 flow [2023-08-30 06:28:53,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 224 transitions, 478 flow [2023-08-30 06:28:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 224 transitions, 478 flow [2023-08-30 06:28:53,578 INFO L130 PetriNetUnfolder]: 14/224 cut-off events. [2023-08-30 06:28:53,579 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:28:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 224 events. 14/224 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 357 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 180. Up to 2 conditions per place. [2023-08-30 06:28:53,588 INFO L119 LiptonReduction]: Number of co-enabled transitions 8466 [2023-08-30 06:29:19,907 INFO L134 LiptonReduction]: Checked pairs total: 13254 [2023-08-30 06:29:19,908 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-30 06:29:19,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:29:19,923 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;@2c68907b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:29:19,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-08-30 06:29:19,926 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:29:19,926 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:29:19,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:19,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:29:19,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:19,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 31246, now seen corresponding path program 1 times [2023-08-30 06:29:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:19,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408216511] [2023-08-30 06:29:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:19,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:19,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:19,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:29:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:29:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:20,349 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-08-30 06:29:20,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 93 [2023-08-30 06:29:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:20,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:29:20,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408216511] [2023-08-30 06:29:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408216511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:29:20,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:29:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:29:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413346892] [2023-08-30 06:29:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:29:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:29:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:29:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:29:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:29:20,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:20,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:20,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:29:20,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:27,104 INFO L130 PetriNetUnfolder]: 65876/79025 cut-off events. [2023-08-30 06:29:27,104 INFO L131 PetriNetUnfolder]: For 614/614 co-relation queries the response was YES. [2023-08-30 06:29:27,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160498 conditions, 79025 events. 65876/79025 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375001 event pairs, 42198 based on Foata normal form. 0/30999 useless extension candidates. Maximal degree in co-relation 144276. Up to 78857 conditions per place. [2023-08-30 06:29:27,708 INFO L137 encePairwiseOnDemand]: 435/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 06:29:27,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 302 flow [2023-08-30 06:29:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:29:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:29:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-30 06:29:27,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47185185185185186 [2023-08-30 06:29:27,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-30 06:29:27,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-30 06:29:27,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:27,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-30 06:29:27,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:27,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:27,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:27,738 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 200 flow. Second operand 3 states and 637 transitions. [2023-08-30 06:29:27,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 302 flow [2023-08-30 06:29:28,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-30 06:29:28,113 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 154 flow [2023-08-30 06:29:28,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 06:29:28,117 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2023-08-30 06:29:28,117 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 154 flow [2023-08-30 06:29:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:28,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:29:28,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:28,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:28,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash 31317, now seen corresponding path program 1 times [2023-08-30 06:29:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:28,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908892669] [2023-08-30 06:29:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:28,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:28,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:28,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:29:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:29:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:28,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:29:28,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:28,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908892669] [2023-08-30 06:29:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908892669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:29:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:29:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:29:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126294468] [2023-08-30 06:29:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:29:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:29:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:29:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:29:28,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 450 [2023-08-30 06:29:28,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:28,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:28,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 450 [2023-08-30 06:29:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:33,224 INFO L130 PetriNetUnfolder]: 65876/79027 cut-off events. [2023-08-30 06:29:33,224 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:29:33,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159013 conditions, 79027 events. 65876/79027 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 374980 event pairs, 42198 based on Foata normal form. 0/31000 useless extension candidates. Maximal degree in co-relation 159007. Up to 78858 conditions per place. [2023-08-30 06:29:33,722 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-30 06:29:33,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 292 flow [2023-08-30 06:29:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:29:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:29:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-08-30 06:29:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762962962962963 [2023-08-30 06:29:33,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-08-30 06:29:33,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-08-30 06:29:33,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:33,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-08-30 06:29:33,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:33,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:33,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:33,733 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 154 flow. Second operand 3 states and 643 transitions. [2023-08-30 06:29:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 292 flow [2023-08-30 06:29:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:29:33,738 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 169 flow [2023-08-30 06:29:33,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-08-30 06:29:33,739 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-30 06:29:33,741 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 169 flow [2023-08-30 06:29:33,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:33,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:33,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:29:33,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:33,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:33,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:33,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 31247, now seen corresponding path program 1 times [2023-08-30 06:29:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:33,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026825790] [2023-08-30 06:29:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:33,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:33,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:29:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:29:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:34,426 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 06:29:34,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 06:29:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:34,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:29:34,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:34,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026825790] [2023-08-30 06:29:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026825790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:29:34,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:29:34,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:29:34,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793026916] [2023-08-30 06:29:34,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:29:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:29:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:29:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:29:34,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:29:34,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:34,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:34,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:29:34,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:39,433 INFO L130 PetriNetUnfolder]: 65876/79026 cut-off events. [2023-08-30 06:29:39,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:29:39,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159019 conditions, 79026 events. 65876/79026 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375061 event pairs, 42198 based on Foata normal form. 1/31002 useless extension candidates. Maximal degree in co-relation 159011. Up to 78858 conditions per place. [2023-08-30 06:29:39,818 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-30 06:29:39,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 301 flow [2023-08-30 06:29:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:29:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:29:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-30 06:29:39,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-08-30 06:29:39,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-30 06:29:39,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-30 06:29:39,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:39,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-30 06:29:39,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:39,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:39,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:39,827 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 169 flow. Second operand 3 states and 625 transitions. [2023-08-30 06:29:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 301 flow [2023-08-30 06:29:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 297 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:29:39,830 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 173 flow [2023-08-30 06:29:39,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-30 06:29:39,831 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-08-30 06:29:39,831 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 173 flow [2023-08-30 06:29:39,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:39,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:39,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:29:39,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:40,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:40,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 971020, now seen corresponding path program 1 times [2023-08-30 06:29:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44511746] [2023-08-30 06:29:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:40,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:40,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:29:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:29:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:40,327 INFO L321 Elim1Store]: treesize reduction 350, result has 9.3 percent of original size [2023-08-30 06:29:40,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2023-08-30 06:29:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:29:40,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:29:40,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:40,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44511746] [2023-08-30 06:29:40,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44511746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:29:40,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:29:40,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:29:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615502744] [2023-08-30 06:29:40,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:29:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:29:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:29:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:29:41,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:29:41,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:41,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:41,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:29:41,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:45,213 INFO L130 PetriNetUnfolder]: 55616/66965 cut-off events. [2023-08-30 06:29:45,213 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:29:45,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134899 conditions, 66965 events. 55616/66965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 315478 event pairs, 35418 based on Foata normal form. 0/26861 useless extension candidates. Maximal degree in co-relation 134889. Up to 66797 conditions per place. [2023-08-30 06:29:45,705 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 06:29:45,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 295 flow [2023-08-30 06:29:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:29:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:29:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-30 06:29:45,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614814814814815 [2023-08-30 06:29:45,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-30 06:29:45,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-30 06:29:45,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:45,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-30 06:29:45,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:45,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:45,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:45,713 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 173 flow. Second operand 3 states and 623 transitions. [2023-08-30 06:29:45,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 295 flow [2023-08-30 06:29:45,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:29:45,715 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 165 flow [2023-08-30 06:29:45,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-30 06:29:45,716 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-30 06:29:45,717 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 165 flow [2023-08-30 06:29:45,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:45,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:45,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:29:45,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:45,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:45,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:45,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash 971019, now seen corresponding path program 1 times [2023-08-30 06:29:45,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:45,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437616259] [2023-08-30 06:29:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:45,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:45,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:29:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:29:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:29:46,277 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-08-30 06:29:46,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-08-30 06:29:46,310 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 06:29:46,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 06:29:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:46,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:46,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:46,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437616259] [2023-08-30 06:29:46,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437616259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:46,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:46,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:29:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546406779] [2023-08-30 06:29:46,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:29:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:29:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:29:47,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 06:29:47,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:47,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:47,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 06:29:47,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:29:55,268 INFO L130 PetriNetUnfolder]: 100542/121441 cut-off events. [2023-08-30 06:29:55,269 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:29:55,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244778 conditions, 121441 events. 100542/121441 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5440. Compared 610210 event pairs, 63888 based on Foata normal form. 0/49548 useless extension candidates. Maximal degree in co-relation 244768. Up to 66328 conditions per place. [2023-08-30 06:29:55,850 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 121 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2023-08-30 06:29:55,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 585 flow [2023-08-30 06:29:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:29:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:29:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1373 transitions. [2023-08-30 06:29:55,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43587301587301586 [2023-08-30 06:29:55,855 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1373 transitions. [2023-08-30 06:29:55,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1373 transitions. [2023-08-30 06:29:55,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:29:55,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1373 transitions. [2023-08-30 06:29:55,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:55,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:55,865 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:55,865 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 165 flow. Second operand 7 states and 1373 transitions. [2023-08-30 06:29:55,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 585 flow [2023-08-30 06:29:55,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:29:55,868 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 227 flow [2023-08-30 06:29:55,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-30 06:29:55,869 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 06:29:55,870 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 227 flow [2023-08-30 06:29:55,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:55,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:29:55,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:29:55,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:29:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:56,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:29:56,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:29:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 970950, now seen corresponding path program 1 times [2023-08-30 06:29:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:29:56,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746473133] [2023-08-30 06:29:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:29:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:29:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:29:56,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:29:56,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:29:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:29:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:29:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:29:56,400 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 06:29:56,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 06:29:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:56,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:29:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:29:56,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:29:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746473133] [2023-08-30 06:29:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746473133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:29:56,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:29:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:29:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844178027] [2023-08-30 06:29:56,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:29:56,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:29:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:29:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:29:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:29:57,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 450 [2023-08-30 06:29:57,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:29:57,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:29:57,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 450 [2023-08-30 06:29:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:04,952 INFO L130 PetriNetUnfolder]: 100541/121438 cut-off events. [2023-08-30 06:30:04,952 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2023-08-30 06:30:05,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246592 conditions, 121438 events. 100541/121438 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 5254. Compared 608539 event pairs, 63888 based on Foata normal form. 3/51351 useless extension candidates. Maximal degree in co-relation 246578. Up to 66328 conditions per place. [2023-08-30 06:30:05,866 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 119 selfloop transitions, 8 changer transitions 0/133 dead transitions. [2023-08-30 06:30:05,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 607 flow [2023-08-30 06:30:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:30:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:30:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-30 06:30:05,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45037037037037037 [2023-08-30 06:30:05,871 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-30 06:30:05,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-30 06:30:05,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:05,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-30 06:30:05,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:05,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:05,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:05,879 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 227 flow. Second operand 6 states and 1216 transitions. [2023-08-30 06:30:05,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 607 flow [2023-08-30 06:30:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 591 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 06:30:05,882 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 221 flow [2023-08-30 06:30:05,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-08-30 06:30:05,883 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2023-08-30 06:30:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 221 flow [2023-08-30 06:30:05,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:05,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:05,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:30:05,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:06,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:30:06,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash 933171617, now seen corresponding path program 1 times [2023-08-30 06:30:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681154160] [2023-08-30 06:30:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:06,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:06,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:06,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:30:06,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:30:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 06:30:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:06,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:30:06,523 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2023-08-30 06:30:06,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2023-08-30 06:30:06,579 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 06:30:06,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2023-08-30 06:30:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:07,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:07,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681154160] [2023-08-30 06:30:07,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681154160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:07,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:30:07,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:30:07,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403532215] [2023-08-30 06:30:07,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:07,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:30:07,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:30:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:30:08,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 06:30:08,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:08,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:08,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 06:30:08,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:15,595 INFO L130 PetriNetUnfolder]: 97709/117994 cut-off events. [2023-08-30 06:30:15,595 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 06:30:15,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239704 conditions, 117994 events. 97709/117994 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5226. Compared 589881 event pairs, 62118 based on Foata normal form. 0/50263 useless extension candidates. Maximal degree in co-relation 239690. Up to 64610 conditions per place. [2023-08-30 06:30:16,284 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 120 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-08-30 06:30:16,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 591 flow [2023-08-30 06:30:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:30:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:30:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2023-08-30 06:30:16,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448 [2023-08-30 06:30:16,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2023-08-30 06:30:16,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2023-08-30 06:30:16,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:16,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2023-08-30 06:30:16,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:16,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:16,293 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:16,293 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 221 flow. Second operand 5 states and 1008 transitions. [2023-08-30 06:30:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 591 flow [2023-08-30 06:30:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 572 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 06:30:16,296 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 204 flow [2023-08-30 06:30:16,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-30 06:30:16,297 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 06:30:16,297 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 204 flow [2023-08-30 06:30:16,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:16,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:16,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:30:16,306 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 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:16,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:30:16,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash 933171616, now seen corresponding path program 1 times [2023-08-30 06:30:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:16,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445087051] [2023-08-30 06:30:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:16,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:16,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:30:16,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:30:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:30:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:16,746 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2023-08-30 06:30:16,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2023-08-30 06:30:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:30:17,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:30:17,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445087051] [2023-08-30 06:30:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445087051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:30:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:30:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:30:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215856507] [2023-08-30 06:30:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:30:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:30:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:30:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:30:17,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:30:17,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:17,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:17,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:30:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:24,396 INFO L130 PetriNetUnfolder]: 95309/114982 cut-off events. [2023-08-30 06:30:24,397 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 06:30:24,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233709 conditions, 114982 events. 95309/114982 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5346. Compared 575476 event pairs, 60516 based on Foata normal form. 0/49212 useless extension candidates. Maximal degree in co-relation 233695. Up to 114646 conditions per place. [2023-08-30 06:30:25,220 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 06:30:25,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 330 flow [2023-08-30 06:30:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:30:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:30:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-30 06:30:25,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585185185185185 [2023-08-30 06:30:25,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-30 06:30:25,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-30 06:30:25,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:25,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-30 06:30:25,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:25,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:25,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:25,226 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 204 flow. Second operand 3 states and 619 transitions. [2023-08-30 06:30:25,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 330 flow [2023-08-30 06:30:25,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 325 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:30:25,229 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2023-08-30 06:30:25,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-30 06:30:25,229 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -15 predicate places. [2023-08-30 06:30:25,230 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2023-08-30 06:30:25,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:25,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:25,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:30:25,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:25,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:30:25,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 933171359, now seen corresponding path program 1 times [2023-08-30 06:30:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683067562] [2023-08-30 06:30:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:25,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:25,441 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:30:25,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:30:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:30:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:25,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:25,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:30:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:25,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:25,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683067562] [2023-08-30 06:30:25,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683067562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:25,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:30:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:30:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591542449] [2023-08-30 06:30:25,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:30:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:30:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:30:26,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 450 [2023-08-30 06:30:26,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:26,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:26,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 450 [2023-08-30 06:30:26,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:33,592 INFO L130 PetriNetUnfolder]: 94877/114544 cut-off events. [2023-08-30 06:30:33,592 INFO L131 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2023-08-30 06:30:33,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232802 conditions, 114544 events. 94877/114544 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 5198. Compared 571440 event pairs, 60348 based on Foata normal form. 0/49176 useless extension candidates. Maximal degree in co-relation 232788. Up to 62883 conditions per place. [2023-08-30 06:30:34,390 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 111 selfloop transitions, 8 changer transitions 0/123 dead transitions. [2023-08-30 06:30:34,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 555 flow [2023-08-30 06:30:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:30:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:30:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1379 transitions. [2023-08-30 06:30:34,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2023-08-30 06:30:34,396 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1379 transitions. [2023-08-30 06:30:34,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1379 transitions. [2023-08-30 06:30:34,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:34,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1379 transitions. [2023-08-30 06:30:34,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:34,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:34,403 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 450.0) internal successors, (3600), 8 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:34,404 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 1379 transitions. [2023-08-30 06:30:34,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 555 flow [2023-08-30 06:30:34,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:30:34,407 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 216 flow [2023-08-30 06:30:34,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-08-30 06:30:34,407 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-30 06:30:34,407 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 216 flow [2023-08-30 06:30:34,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.25) internal successors, (1450), 8 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:34,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:34,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:30:34,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:30:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:34,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:30:34,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 933171358, now seen corresponding path program 1 times [2023-08-30 06:30:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470521487] [2023-08-30 06:30:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:30:34,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:34,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:30:34,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:30:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:30:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:30:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:34,850 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2023-08-30 06:30:34,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 93 [2023-08-30 06:30:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:30:34,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:30:34,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:34,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470521487] [2023-08-30 06:30:34,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470521487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:30:34,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:30:34,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:30:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918012498] [2023-08-30 06:30:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:30:34,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:30:34,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:30:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:30:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 450 [2023-08-30 06:30:35,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:35,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:35,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 450 [2023-08-30 06:30:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:30:38,144 INFO L130 PetriNetUnfolder]: 42107/51316 cut-off events. [2023-08-30 06:30:38,144 INFO L131 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2023-08-30 06:30:38,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104356 conditions, 51316 events. 42107/51316 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 241748 event pairs, 26336 based on Foata normal form. 0/26029 useless extension candidates. Maximal degree in co-relation 104341. Up to 51129 conditions per place. [2023-08-30 06:30:38,406 INFO L137 encePairwiseOnDemand]: 441/450 looper letters, 56 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-08-30 06:30:38,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 64 transitions, 328 flow [2023-08-30 06:30:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:30:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:30:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-08-30 06:30:38,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42944444444444446 [2023-08-30 06:30:38,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-08-30 06:30:38,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-08-30 06:30:38,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:30:38,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-08-30 06:30:38,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:38,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:38,413 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:38,413 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 216 flow. Second operand 4 states and 773 transitions. [2023-08-30 06:30:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 64 transitions, 328 flow [2023-08-30 06:30:38,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 313 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 06:30:38,415 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 201 flow [2023-08-30 06:30:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-08-30 06:30:38,416 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2023-08-30 06:30:38,416 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 201 flow [2023-08-30 06:30:38,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:30:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:30:38,428 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 [2023-08-30 06:30:38,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:38,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:30:38,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:30:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922673, now seen corresponding path program 2 times [2023-08-30 06:30:38,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:30:38,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245060775] [2023-08-30 06:30:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:30:38,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:30:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:30:38,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:30:38,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:30:38,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:30:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:30:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:30:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:30:38,936 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 06:30:38,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 06:30:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:39,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:30:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:30:39,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:30:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245060775] [2023-08-30 06:30:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245060775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:30:39,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:30:39,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:30:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476954925] [2023-08-30 06:30:39,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:30:39,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:30:39,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:30:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:30:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:30:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 450 [2023-08-30 06:30:43,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:30:43,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:30:43,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 450 [2023-08-30 06:30:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:31:03,576 INFO L130 PetriNetUnfolder]: 202871/247098 cut-off events. [2023-08-30 06:31:03,576 INFO L131 PetriNetUnfolder]: For 3224/3224 co-relation queries the response was YES. [2023-08-30 06:31:04,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504460 conditions, 247098 events. 202871/247098 cut-off events. For 3224/3224 co-relation queries the response was YES. Maximal size of possible extension queue 8121. Compared 1326161 event pairs, 127672 based on Foata normal form. 6/127270 useless extension candidates. Maximal degree in co-relation 504445. Up to 27892 conditions per place. [2023-08-30 06:31:05,078 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 466 selfloop transitions, 13 changer transitions 0/481 dead transitions. [2023-08-30 06:31:05,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 481 transitions, 2183 flow [2023-08-30 06:31:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:31:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:31:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2669 transitions. [2023-08-30 06:31:05,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49425925925925923 [2023-08-30 06:31:05,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2669 transitions. [2023-08-30 06:31:05,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2669 transitions. [2023-08-30 06:31:05,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:05,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2669 transitions. [2023-08-30 06:31:05,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 222.41666666666666) internal successors, (2669), 12 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:05,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:05,095 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:05,095 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 201 flow. Second operand 12 states and 2669 transitions. [2023-08-30 06:31:05,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 481 transitions, 2183 flow [2023-08-30 06:31:05,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 481 transitions, 2164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:31:05,101 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 296 flow [2023-08-30 06:31:05,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=296, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2023-08-30 06:31:05,102 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2023-08-30 06:31:05,102 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 296 flow [2023-08-30 06:31:05,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:05,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:31:05,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:31:05,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:31:05,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:05,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:31:05,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:31:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1136922604, now seen corresponding path program 2 times [2023-08-30 06:31:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:31:05,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781583169] [2023-08-30 06:31:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:31:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:31:05,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:31:05,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:31:05,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:31:05,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:31:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:31:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:31:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:05,673 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2023-08-30 06:31:05,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-08-30 06:31:05,706 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 06:31:05,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 06:31:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:31:05,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:31:05,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:31:05,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781583169] [2023-08-30 06:31:05,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781583169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:31:05,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:31:05,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:31:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733322953] [2023-08-30 06:31:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:31:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:31:05,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:31:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:31:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:31:05,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 450 [2023-08-30 06:31:05,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:05,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:31:05,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 450 [2023-08-30 06:31:05,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:31:20,827 INFO L130 PetriNetUnfolder]: 169670/207491 cut-off events. [2023-08-30 06:31:20,827 INFO L131 PetriNetUnfolder]: For 3234/3234 co-relation queries the response was YES. [2023-08-30 06:31:21,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419056 conditions, 207491 events. 169670/207491 cut-off events. For 3234/3234 co-relation queries the response was YES. Maximal size of possible extension queue 6993. Compared 1121498 event pairs, 105552 based on Foata normal form. 6400/110184 useless extension candidates. Maximal degree in co-relation 419034. Up to 206681 conditions per place. [2023-08-30 06:31:22,587 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 66 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 06:31:22,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 69 transitions, 404 flow [2023-08-30 06:31:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:31:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:31:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-30 06:31:22,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46074074074074073 [2023-08-30 06:31:22,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-30 06:31:22,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-30 06:31:22,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:22,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-30 06:31:22,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:22,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:22,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:22,593 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 296 flow. Second operand 3 states and 622 transitions. [2023-08-30 06:31:22,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 69 transitions, 404 flow [2023-08-30 06:31:22,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 69 transitions, 391 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:31:22,595 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 259 flow [2023-08-30 06:31:22,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2023-08-30 06:31:22,602 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2023-08-30 06:31:22,602 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 259 flow [2023-08-30 06:31:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:22,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:31:22,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:31:22,616 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 [2023-08-30 06:31:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:22,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:31:22,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:31:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash -870216760, now seen corresponding path program 1 times [2023-08-30 06:31:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:31:22,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063689023] [2023-08-30 06:31:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:31:22,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:31:22,815 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:31:22,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:31:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:31:22,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:31:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:31:23,043 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2023-08-30 06:31:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 81 [2023-08-30 06:31:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:31:23,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:31:23,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:31:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063689023] [2023-08-30 06:31:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063689023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:31:23,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:31:23,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:31:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972464540] [2023-08-30 06:31:23,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:31:23,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:31:23,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:31:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:31:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:31:23,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:31:23,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:23,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:31:23,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:31:23,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:31:39,289 INFO L130 PetriNetUnfolder]: 168212/205520 cut-off events. [2023-08-30 06:31:39,290 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-30 06:31:40,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415102 conditions, 205520 events. 168212/205520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6993. Compared 1108294 event pairs, 104616 based on Foata normal form. 0/103082 useless extension candidates. Maximal degree in co-relation 415080. Up to 204710 conditions per place. [2023-08-30 06:31:40,842 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 64 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 06:31:40,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 67 transitions, 385 flow [2023-08-30 06:31:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:31:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:31:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-30 06:31:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525925925925926 [2023-08-30 06:31:40,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-30 06:31:40,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-30 06:31:40,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:40,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-30 06:31:40,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 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) [2023-08-30 06:31:40,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:40,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:40,847 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 259 flow. Second operand 3 states and 611 transitions. [2023-08-30 06:31:40,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 67 transitions, 385 flow [2023-08-30 06:31:40,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:31:40,850 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 256 flow [2023-08-30 06:31:40,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2023-08-30 06:31:40,851 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2023-08-30 06:31:40,851 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 256 flow [2023-08-30 06:31:40,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:40,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:31:40,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:31:40,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:31:41,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:41,064 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:31:41,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:31:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash -870216761, now seen corresponding path program 1 times [2023-08-30 06:31:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:31:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379306987] [2023-08-30 06:31:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:31:41,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:31:41,067 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:31:41,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:31:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:31:41,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:31:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:31:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:31:41,543 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2023-08-30 06:31:41,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2023-08-30 06:31:41,567 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:31:41,567 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 39 treesize of output 35 [2023-08-30 06:31:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:31:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:31:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:31:42,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:31:42,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379306987] [2023-08-30 06:31:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379306987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:31:42,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:31:42,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:31:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619201302] [2023-08-30 06:31:42,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:31:42,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:31:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:31:42,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:31:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:31:43,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 06:31:43,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 178.75) internal successors, (1430), 8 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:43,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:31:43,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 06:31:43,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:31:57,735 INFO L130 PetriNetUnfolder]: 164754/201549 cut-off events. [2023-08-30 06:31:57,735 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-30 06:31:58,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406961 conditions, 201549 events. 164754/201549 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6991. Compared 1087348 event pairs, 102760 based on Foata normal form. 0/102180 useless extension candidates. Maximal degree in co-relation 406938. Up to 178012 conditions per place. [2023-08-30 06:31:59,355 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 06:31:59,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 568 flow [2023-08-30 06:31:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:31:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:31:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 986 transitions. [2023-08-30 06:31:59,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43822222222222224 [2023-08-30 06:31:59,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 986 transitions. [2023-08-30 06:31:59,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 986 transitions. [2023-08-30 06:31:59,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:31:59,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 986 transitions. [2023-08-30 06:31:59,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:59,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:59,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:59,361 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 256 flow. Second operand 5 states and 986 transitions. [2023-08-30 06:31:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 568 flow [2023-08-30 06:31:59,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 567 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:31:59,364 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 257 flow [2023-08-30 06:31:59,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2023-08-30 06:31:59,365 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2023-08-30 06:31:59,365 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 257 flow [2023-08-30 06:31:59,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.75) internal successors, (1430), 8 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:59,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:31:59,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:31:59,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:31:59,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:59,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:31:59,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:31:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash -870463380, now seen corresponding path program 1 times [2023-08-30 06:31:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:31:59,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391738754] [2023-08-30 06:31:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:31:59,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:31:59,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:31:59,575 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:31:59,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:31:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:31:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:31:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:31:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:31:59,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:31:59,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:31:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391738754] [2023-08-30 06:31:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391738754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:31:59,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:31:59,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:31:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379322040] [2023-08-30 06:31:59,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:31:59,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:31:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:31:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:31:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:31:59,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 450 [2023-08-30 06:31:59,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:31:59,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:31:59,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 450 [2023-08-30 06:31:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:32:22,080 INFO L130 PetriNetUnfolder]: 253973/308462 cut-off events. [2023-08-30 06:32:22,080 INFO L131 PetriNetUnfolder]: For 1420/1420 co-relation queries the response was YES. [2023-08-30 06:32:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623762 conditions, 308462 events. 253973/308462 cut-off events. For 1420/1420 co-relation queries the response was YES. Maximal size of possible extension queue 10121. Compared 1649114 event pairs, 66393 based on Foata normal form. 0/154157 useless extension candidates. Maximal degree in co-relation 623738. Up to 211032 conditions per place. [2023-08-30 06:32:24,576 INFO L137 encePairwiseOnDemand]: 442/450 looper letters, 119 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-30 06:32:24,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 648 flow [2023-08-30 06:32:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:32:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:32:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-08-30 06:32:24,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613333333333333 [2023-08-30 06:32:24,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-08-30 06:32:24,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-08-30 06:32:24,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:32:24,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-08-30 06:32:24,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:32:24,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:32:24,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:32:24,582 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 257 flow. Second operand 5 states and 1038 transitions. [2023-08-30 06:32:24,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 648 flow [2023-08-30 06:32:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 643 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:32:24,585 INFO L231 Difference]: Finished difference. Result has 91 places, 70 transitions, 295 flow [2023-08-30 06:32:24,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=70} [2023-08-30 06:32:24,585 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2023-08-30 06:32:24,585 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 70 transitions, 295 flow [2023-08-30 06:32:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:32:24,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:32:24,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:32:24,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-30 06:32:24,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:32:24,795 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:32:24,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:32:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1214556723, now seen corresponding path program 1 times [2023-08-30 06:32:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:32:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227462530] [2023-08-30 06:32:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:32:24,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:32:24,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:32:24,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:32:24,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:32:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:32:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:32:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:32:25,120 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2023-08-30 06:32:25,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2023-08-30 06:32:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:32:25,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:32:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:32:25,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:32:25,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227462530] [2023-08-30 06:32:25,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227462530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:32:25,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:32:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:32:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378437871] [2023-08-30 06:32:25,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:32:25,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:32:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:32:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:32:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:32:28,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 06:32:28,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 70 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:32:28,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:32:28,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 06:32:28,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:33:06,923 INFO L130 PetriNetUnfolder]: 357428/431681 cut-off events. [2023-08-30 06:33:06,923 INFO L131 PetriNetUnfolder]: For 108988/108988 co-relation queries the response was YES. [2023-08-30 06:33:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016766 conditions, 431681 events. 357428/431681 cut-off events. For 108988/108988 co-relation queries the response was YES. Maximal size of possible extension queue 13248. Compared 2439919 event pairs, 63540 based on Foata normal form. 6588/317444 useless extension candidates. Maximal degree in co-relation 1016740. Up to 150850 conditions per place. [2023-08-30 06:33:10,963 INFO L137 encePairwiseOnDemand]: 444/450 looper letters, 175 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2023-08-30 06:33:10,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 190 transitions, 962 flow [2023-08-30 06:33:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:33:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:33:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1590 transitions. [2023-08-30 06:33:10,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-08-30 06:33:10,967 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1590 transitions. [2023-08-30 06:33:10,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1590 transitions. [2023-08-30 06:33:10,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:33:10,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1590 transitions. [2023-08-30 06:33:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.75) internal successors, (1590), 8 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:10,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 450.0) internal successors, (4050), 9 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:10,972 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 450.0) internal successors, (4050), 9 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:10,972 INFO L175 Difference]: Start difference. First operand has 91 places, 70 transitions, 295 flow. Second operand 8 states and 1590 transitions. [2023-08-30 06:33:10,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 190 transitions, 962 flow [2023-08-30 06:33:11,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 190 transitions, 953 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:33:11,020 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 361 flow [2023-08-30 06:33:11,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2023-08-30 06:33:11,021 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 5 predicate places. [2023-08-30 06:33:11,021 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 361 flow [2023-08-30 06:33:11,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.6) internal successors, (1786), 10 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:11,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:33:11,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:33:11,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:33:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:33:11,234 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:33:11,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:33:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1240337822, now seen corresponding path program 1 times [2023-08-30 06:33:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:33:11,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106632271] [2023-08-30 06:33:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:33:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:33:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:33:11,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:33:11,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:33:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:33:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:33:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:33:11,494 INFO L321 Elim1Store]: treesize reduction 290, result has 11.0 percent of original size [2023-08-30 06:33:11,494 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 6 case distinctions, treesize of input 43 treesize of output 62 [2023-08-30 06:33:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:33:11,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:33:11,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:33:11,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106632271] [2023-08-30 06:33:11,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106632271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:33:11,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:33:11,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:33:11,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178261576] [2023-08-30 06:33:11,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:33:11,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:33:11,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:33:11,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:33:11,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:33:12,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 450 [2023-08-30 06:33:12,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:12,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:33:12,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 450 [2023-08-30 06:33:12,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:33:48,387 INFO L130 PetriNetUnfolder]: 345674/417965 cut-off events. [2023-08-30 06:33:48,387 INFO L131 PetriNetUnfolder]: For 415497/415497 co-relation queries the response was YES. [2023-08-30 06:33:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121074 conditions, 417965 events. 345674/417965 cut-off events. For 415497/415497 co-relation queries the response was YES. Maximal size of possible extension queue 13023. Compared 2301102 event pairs, 206685 based on Foata normal form. 0/309173 useless extension candidates. Maximal degree in co-relation 1121042. Up to 416804 conditions per place. [2023-08-30 06:33:52,500 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 70 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 06:33:52,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 73 transitions, 499 flow [2023-08-30 06:33:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:33:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:33:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-30 06:33:52,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44962962962962966 [2023-08-30 06:33:52,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-30 06:33:52,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-30 06:33:52,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:33:52,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-30 06:33:52,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:52,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:52,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:52,663 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 361 flow. Second operand 3 states and 607 transitions. [2023-08-30 06:33:52,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 73 transitions, 499 flow [2023-08-30 06:33:53,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 73 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 06:33:53,124 INFO L231 Difference]: Finished difference. Result has 98 places, 73 transitions, 342 flow [2023-08-30 06:33:53,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=98, PETRI_TRANSITIONS=73} [2023-08-30 06:33:53,125 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2023-08-30 06:33:53,125 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 73 transitions, 342 flow [2023-08-30 06:33:53,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:53,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:33:53,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:33:53,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:33:53,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:33:53,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:33:53,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:33:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1240337821, now seen corresponding path program 1 times [2023-08-30 06:33:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:33:53,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443286273] [2023-08-30 06:33:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:33:53,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:33:53,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:33:53,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:33:53,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:33:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:33:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:33:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:33:53,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:33:53,709 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2023-08-30 06:33:53,710 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 5 case distinctions, treesize of input 23 treesize of output 80 [2023-08-30 06:33:53,729 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 246 treesize of output 242 [2023-08-30 06:33:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:33:53,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:33:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:33:54,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:33:54,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443286273] [2023-08-30 06:33:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443286273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:33:54,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:33:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:33:54,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210279057] [2023-08-30 06:33:54,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:33:54,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:33:54,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:33:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:33:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:33:55,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 450 [2023-08-30 06:33:55,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 73 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 179.25) internal successors, (1434), 8 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:33:55,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:33:55,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 450 [2023-08-30 06:33:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:34:32,694 INFO L130 PetriNetUnfolder]: 338641/408970 cut-off events. [2023-08-30 06:34:32,695 INFO L131 PetriNetUnfolder]: For 335952/335952 co-relation queries the response was YES. [2023-08-30 06:34:35,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065643 conditions, 408970 events. 338641/408970 cut-off events. For 335952/335952 co-relation queries the response was YES. Maximal size of possible extension queue 12581. Compared 2235714 event pairs, 202238 based on Foata normal form. 0/304121 useless extension candidates. Maximal degree in co-relation 1065611. Up to 362468 conditions per place. [2023-08-30 06:34:36,991 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 117 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-08-30 06:34:36,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 122 transitions, 750 flow [2023-08-30 06:34:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:34:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:34:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 978 transitions. [2023-08-30 06:34:36,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-08-30 06:34:36,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 978 transitions. [2023-08-30 06:34:36,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 978 transitions. [2023-08-30 06:34:36,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:34:36,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 978 transitions. [2023-08-30 06:34:36,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:36,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:36,998 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 450.0) internal successors, (2700), 6 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:36,998 INFO L175 Difference]: Start difference. First operand has 98 places, 73 transitions, 342 flow. Second operand 5 states and 978 transitions. [2023-08-30 06:34:36,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 122 transitions, 750 flow [2023-08-30 06:34:37,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 749 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:34:37,487 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 343 flow [2023-08-30 06:34:37,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2023-08-30 06:34:37,488 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 3 predicate places. [2023-08-30 06:34:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 343 flow [2023-08-30 06:34:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.25) internal successors, (1434), 8 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:37,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:34:37,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:34:37,496 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 [2023-08-30 06:34:37,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:34:37,689 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-08-30 06:34:37,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:34:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1240100951, now seen corresponding path program 1 times [2023-08-30 06:34:37,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:34:37,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40574018] [2023-08-30 06:34:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:34:37,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:34:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:34:37,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:34:37,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:34:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:34:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:34:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:34:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:34:37,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:34:37,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:34:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40574018] [2023-08-30 06:34:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40574018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:34:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:34:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:34:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30961908] [2023-08-30 06:34:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:34:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:34:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:34:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:34:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:34:38,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 450 [2023-08-30 06:34:38,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 343 flow. Second operand has 6 states, 6 states have (on average 186.5) internal successors, (1119), 6 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:34:38,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:34:38,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 450 [2023-08-30 06:34:38,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:35:37,129 INFO L130 PetriNetUnfolder]: 488711/587804 cut-off events. [2023-08-30 06:35:37,130 INFO L131 PetriNetUnfolder]: For 406566/406800 co-relation queries the response was YES.