./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:48:48,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:48:48,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:48:48,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:48:48,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:48:48,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:48:48,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:48:48,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:48:48,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:48:48,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:48:48,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:48:48,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:48:48,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:48:48,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:48:48,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:48:48,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:48:48,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:48:48,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:48:48,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:48:48,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:48:48,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:48:48,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:48:48,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:48:48,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:48:48,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:48:48,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:48:48,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:48:48,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:48:48,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:48:48,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:48:48,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:48:48,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:48:48,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:48:48,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:48:48,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:48:48,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:48:48,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:48:48,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:48:48,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:48:48,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:48:48,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:48:48,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:48:48,813 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:48:48,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:48:48,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:48:48,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:48:48,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:48:48,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:48:48,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:48:48,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:48:48,816 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:48:48,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:48:48,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:48:48,817 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:48:48,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:48:48,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:48:48,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:48:48,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:48:48,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:48:48,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:48:48,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:48:48,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:48,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:48:48,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:48:48,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:48:48,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:48:48,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:48:48,820 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:48:48,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:48:48,820 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:48:48,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:48:49,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:48:49,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:48:49,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:48:49,095 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:48:49,096 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:48:49,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 02:48:50,092 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:48:50,289 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:48:50,289 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 02:48:50,295 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eaca1f7/199b9745f6804e8da10d48bc38892dee/FLAGce3ac75f4 [2023-09-01 02:48:50,312 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eaca1f7/199b9745f6804e8da10d48bc38892dee [2023-09-01 02:48:50,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:48:50,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:48:50,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:50,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:48:50,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:48:50,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:50" (1/1) ... [2023-09-01 02:48:50,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e4a01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:50, skipping insertion in model container [2023-09-01 02:48:50,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:50" (1/1) ... [2023-09-01 02:48:50,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:48:50,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:50,497 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-channel-sum.wvr.c[2947,2960] [2023-09-01 02:48:50,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:50,516 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:48:50,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3496fe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:50, skipping insertion in model container [2023-09-01 02:48:50,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:50,518 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:48:50,520 INFO L158 Benchmark]: Toolchain (without parser) took 203.68ms. Allocated memory is still 75.5MB. Free memory was 53.9MB in the beginning and 44.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:48:50,520 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:48:50,521 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.30ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 44.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:48:50,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.30ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 44.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:48:52,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:48:52,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:48:52,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:48:52,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:48:52,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:48:52,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:48:52,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:48:52,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:48:52,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:48:52,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:48:52,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:48:52,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:48:52,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:48:52,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:48:52,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:48:52,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:48:52,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:48:52,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:48:52,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:48:52,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:48:52,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:48:52,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:48:52,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:48:52,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:48:52,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:48:52,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:48:52,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:48:52,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:48:52,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:48:52,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:48:52,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:48:52,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:48:52,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:48:52,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:48:52,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:48:52,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:48:52,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:48:52,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:48:52,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:48:52,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:48:52,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:48:52,316 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:48:52,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:48:52,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:48:52,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:48:52,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:48:52,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:48:52,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:48:52,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:48:52,319 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:48:52,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:48:52,319 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:48:52,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:48:52,321 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:48:52,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:52,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:48:52,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:48:52,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:48:52,323 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:48:52,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:48:52,323 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:48:52,323 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:48:52,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:48:52,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:48:52,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:48:52,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:48:52,598 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:48:52,598 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:48:52,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 02:48:53,701 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:48:53,835 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:48:53,836 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 02:48:53,840 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81fd9d975/47d673a144f543838dc35614a74a6b4d/FLAG83397c2d6 [2023-09-01 02:48:53,851 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81fd9d975/47d673a144f543838dc35614a74a6b4d [2023-09-01 02:48:53,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:48:53,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:48:53,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:53,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:48:53,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:48:53,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:53" (1/1) ... [2023-09-01 02:48:53,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f7749b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:53, skipping insertion in model container [2023-09-01 02:48:53,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:53" (1/1) ... [2023-09-01 02:48:53,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:48:53,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:53,989 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-channel-sum.wvr.c[2947,2960] [2023-09-01 02:48:53,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:54,007 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:48:54,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:54,026 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-channel-sum.wvr.c[2947,2960] [2023-09-01 02:48:54,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:54,032 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:48:54,060 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-channel-sum.wvr.c[2947,2960] [2023-09-01 02:48:54,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:54,074 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:48:54,080 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:48:54,084 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:48:54,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54 WrapperNode [2023-09-01 02:48:54,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:54,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:54,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:48:54,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:48:54,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,135 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2023-09-01 02:48:54,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:54,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:48:54,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:48:54,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:48:54,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:48:54,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:48:54,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:48:54,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:48:54,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (1/1) ... [2023-09-01 02:48:54,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:54,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:48:54,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:48:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:48:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:48:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:48:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:48:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:48:54,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:48:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:48:54,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:48:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:48:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:48:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:48:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:48:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:48:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:48:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:48:54,265 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:48:54,387 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:48:54,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:48:54,698 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:48:54,741 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:48:54,742 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 02:48:54,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:54 BoogieIcfgContainer [2023-09-01 02:48:54,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:48:54,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:48:54,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:48:54,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:48:54,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:48:53" (1/3) ... [2023-09-01 02:48:54,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2c4a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:54, skipping insertion in model container [2023-09-01 02:48:54,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:54" (2/3) ... [2023-09-01 02:48:54,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2c4a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:54, skipping insertion in model container [2023-09-01 02:48:54,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:54" (3/3) ... [2023-09-01 02:48:54,748 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-09-01 02:48:54,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:48:54,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 02:48:54,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:48:54,816 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:48:54,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 320 flow [2023-09-01 02:48:54,915 INFO L130 PetriNetUnfolder]: 11/150 cut-off events. [2023-09-01 02:48:54,915 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:48:54,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 150 events. 11/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-09-01 02:48:54,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 152 transitions, 320 flow [2023-09-01 02:48:54,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 146 transitions, 304 flow [2023-09-01 02:48:54,934 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:48:54,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 146 transitions, 304 flow [2023-09-01 02:48:54,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 146 transitions, 304 flow [2023-09-01 02:48:54,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 146 transitions, 304 flow [2023-09-01 02:48:54,989 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-09-01 02:48:54,992 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:48:54,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-09-01 02:48:54,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2023-09-01 02:49:07,714 INFO L134 LiptonReduction]: Checked pairs total: 2411 [2023-09-01 02:49:07,714 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-09-01 02:49:07,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:49:07,739 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;@44d50e70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:49:07,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-09-01 02:49:07,741 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:49:07,741 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:49:07,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:07,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:07,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:07,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 20705, now seen corresponding path program 1 times [2023-09-01 02:49:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:07,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783177724] [2023-09-01 02:49:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:07,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:07,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:07,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:07,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:49:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:07,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:08,062 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:08,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:08,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:08,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783177724] [2023-09-01 02:49:08,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783177724] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:08,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:08,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765622607] [2023-09-01 02:49:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:08,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-09-01 02:49:08,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:08,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-09-01 02:49:08,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:08,537 INFO L130 PetriNetUnfolder]: 1065/1520 cut-off events. [2023-09-01 02:49:08,537 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 02:49:08,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1520 events. 1065/1520 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7469 event pairs, 528 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1356. Up to 756 conditions per place. [2023-09-01 02:49:08,547 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-09-01 02:49:08,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 276 flow [2023-09-01 02:49:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-09-01 02:49:08,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48136315228966986 [2023-09-01 02:49:08,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-09-01 02:49:08,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-09-01 02:49:08,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:08,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-09-01 02:49:08,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,578 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 452 transitions. [2023-09-01 02:49:08,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 276 flow [2023-09-01 02:49:08,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:49:08,583 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 84 flow [2023-09-01 02:49:08,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-09-01 02:49:08,587 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-09-01 02:49:08,587 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 84 flow [2023-09-01 02:49:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:08,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:08,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:08,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash 20787, now seen corresponding path program 1 times [2023-09-01 02:49:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153164752] [2023-09-01 02:49:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:08,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:08,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:49:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 02:49:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:08,881 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 02:49:08,882 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 02:49:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:08,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:08,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153164752] [2023-09-01 02:49:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153164752] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:08,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209086377] [2023-09-01 02:49:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:08,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:08,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-09-01 02:49:08,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:08,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:08,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-09-01 02:49:08,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:09,191 INFO L130 PetriNetUnfolder]: 805/1174 cut-off events. [2023-09-01 02:49:09,192 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:49:09,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 1174 events. 805/1174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 5694 event pairs, 396 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 1177. Up to 1162 conditions per place. [2023-09-01 02:49:09,198 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-09-01 02:49:09,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 142 flow [2023-09-01 02:49:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-09-01 02:49:09,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366347177848775 [2023-09-01 02:49:09,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-09-01 02:49:09,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-09-01 02:49:09,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:09,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-09-01 02:49:09,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,205 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 84 flow. Second operand 3 states and 410 transitions. [2023-09-01 02:49:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 142 flow [2023-09-01 02:49:09,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:09,207 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 80 flow [2023-09-01 02:49:09,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-09-01 02:49:09,208 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-09-01 02:49:09,208 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 80 flow [2023-09-01 02:49:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:09,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:09,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:09,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:09,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 20786, now seen corresponding path program 1 times [2023-09-01 02:49:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:09,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793618989] [2023-09-01 02:49:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:09,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:09,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:09,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:49:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:09,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:09,508 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:49:09,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 02:49:09,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 02:49:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:09,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:09,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:09,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793618989] [2023-09-01 02:49:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793618989] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:09,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:09,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111029939] [2023-09-01 02:49:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:09,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:09,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-09-01 02:49:09,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:09,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-09-01 02:49:09,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:09,767 INFO L130 PetriNetUnfolder]: 545/828 cut-off events. [2023-09-01 02:49:09,767 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:49:09,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 828 events. 545/828 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3929 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1659. Up to 816 conditions per place. [2023-09-01 02:49:09,770 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 02:49:09,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-09-01 02:49:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-09-01 02:49:09,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440894568690096 [2023-09-01 02:49:09,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-09-01 02:49:09,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-09-01 02:49:09,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:09,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-09-01 02:49:09,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,775 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 80 flow. Second operand 3 states and 417 transitions. [2023-09-01 02:49:09,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-09-01 02:49:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:09,781 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-09-01 02:49:09,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 02:49:09,782 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-09-01 02:49:09,782 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-09-01 02:49:09,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:09,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:09,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:09,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:09,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:09,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:09,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 20703, now seen corresponding path program 1 times [2023-09-01 02:49:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436068755] [2023-09-01 02:49:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:09,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:09,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:10,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:49:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:49:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:10,061 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:49:10,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:49:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:10,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:10,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436068755] [2023-09-01 02:49:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436068755] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:10,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546471722] [2023-09-01 02:49:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:10,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:10,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-09-01 02:49:10,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:10,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:10,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-09-01 02:49:10,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:10,258 INFO L130 PetriNetUnfolder]: 545/826 cut-off events. [2023-09-01 02:49:10,259 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:49:10,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 826 events. 545/826 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3942 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1655. Up to 814 conditions per place. [2023-09-01 02:49:10,262 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 02:49:10,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2023-09-01 02:49:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-09-01 02:49:10,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44195953141640043 [2023-09-01 02:49:10,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-09-01 02:49:10,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-09-01 02:49:10,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:10,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-09-01 02:49:10,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:10,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:10,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:10,267 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 415 transitions. [2023-09-01 02:49:10,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2023-09-01 02:49:10,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:10,268 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2023-09-01 02:49:10,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 02:49:10,268 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-09-01 02:49:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2023-09-01 02:49:10,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:10,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:10,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:49:10,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:10,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:10,486 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:10,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash 644704, now seen corresponding path program 1 times [2023-09-01 02:49:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:10,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117936119] [2023-09-01 02:49:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:10,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:10,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:10,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:10,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:49:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:49:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:10,576 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:10,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:10,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:10,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117936119] [2023-09-01 02:49:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117936119] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:10,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:10,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:49:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972920386] [2023-09-01 02:49:10,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:10,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:49:10,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:49:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:49:11,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 313 [2023-09-01 02:49:11,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:11,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:11,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 313 [2023-09-01 02:49:11,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:11,574 INFO L130 PetriNetUnfolder]: 819/1242 cut-off events. [2023-09-01 02:49:11,574 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:49:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 1242 events. 819/1242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6365 event pairs, 396 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 2491. Up to 408 conditions per place. [2023-09-01 02:49:11,579 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 74 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-09-01 02:49:11,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 358 flow [2023-09-01 02:49:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:49:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:49:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-09-01 02:49:11,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-09-01 02:49:11,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-09-01 02:49:11,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-09-01 02:49:11,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:11,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-09-01 02:49:11,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:11,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:11,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:11,586 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 828 transitions. [2023-09-01 02:49:11,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 358 flow [2023-09-01 02:49:11,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:11,588 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 129 flow [2023-09-01 02:49:11,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-09-01 02:49:11,589 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-09-01 02:49:11,589 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 129 flow [2023-09-01 02:49:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:11,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:11,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:49:11,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:11,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:11,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 19992011, now seen corresponding path program 1 times [2023-09-01 02:49:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:11,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697749627] [2023-09-01 02:49:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:11,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:49:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:11,872 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 02:49:11,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 02:49:11,878 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 14 treesize of output 12 [2023-09-01 02:49:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:11,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:11,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697749627] [2023-09-01 02:49:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697749627] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:11,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:11,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638857854] [2023-09-01 02:49:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-09-01 02:49:12,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:12,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-09-01 02:49:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:12,190 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-09-01 02:49:12,190 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:49:12,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1143 events. 759/1143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 5791 event pairs, 366 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2314. Up to 1125 conditions per place. [2023-09-01 02:49:12,194 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-09-01 02:49:12,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 187 flow [2023-09-01 02:49:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-09-01 02:49:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-09-01 02:49:12,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-09-01 02:49:12,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-09-01 02:49:12,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:12,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-09-01 02:49:12,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,198 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 129 flow. Second operand 3 states and 414 transitions. [2023-09-01 02:49:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 187 flow [2023-09-01 02:49:12,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 177 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:12,199 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 117 flow [2023-09-01 02:49:12,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-09-01 02:49:12,200 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-09-01 02:49:12,200 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 117 flow [2023-09-01 02:49:12,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:12,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:49:12,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:12,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:12,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:12,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 19992010, now seen corresponding path program 1 times [2023-09-01 02:49:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503661940] [2023-09-01 02:49:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:12,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:12,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:12,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:49:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:49:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:12,484 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 02:49:12,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-09-01 02:49:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:12,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:12,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503661940] [2023-09-01 02:49:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503661940] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:12,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:12,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919911072] [2023-09-01 02:49:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:12,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-09-01 02:49:12,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:12,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-09-01 02:49:12,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:12,673 INFO L130 PetriNetUnfolder]: 699/1044 cut-off events. [2023-09-01 02:49:12,673 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 02:49:12,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 1044 events. 699/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 5145 event pairs, 336 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2112. Up to 1026 conditions per place. [2023-09-01 02:49:12,677 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 02:49:12,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 171 flow [2023-09-01 02:49:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-09-01 02:49:12,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291799787007455 [2023-09-01 02:49:12,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-09-01 02:49:12,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-09-01 02:49:12,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:12,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-09-01 02:49:12,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,699 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 117 flow. Second operand 3 states and 403 transitions. [2023-09-01 02:49:12,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 171 flow [2023-09-01 02:49:12,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:12,700 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 114 flow [2023-09-01 02:49:12,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-09-01 02:49:12,701 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-09-01 02:49:12,701 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 114 flow [2023-09-01 02:49:12,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:12,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:12,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:49:12,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:12,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:12,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:12,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash 619747812, now seen corresponding path program 1 times [2023-09-01 02:49:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:12,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505499533] [2023-09-01 02:49:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:12,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:12,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:49:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:49:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:12,982 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:49:12,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:49:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:12,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:12,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505499533] [2023-09-01 02:49:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505499533] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:12,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:12,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238582860] [2023-09-01 02:49:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:12,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:13,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 313 [2023-09-01 02:49:13,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:13,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 313 [2023-09-01 02:49:13,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:13,243 INFO L130 PetriNetUnfolder]: 402/627 cut-off events. [2023-09-01 02:49:13,243 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 02:49:13,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 627 events. 402/627 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2863 event pairs, 189 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 1278. Up to 605 conditions per place. [2023-09-01 02:49:13,246 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-09-01 02:49:13,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-09-01 02:49:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:49:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:49:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-09-01 02:49:13,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134185303514376 [2023-09-01 02:49:13,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-09-01 02:49:13,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-09-01 02:49:13,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:13,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-09-01 02:49:13,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,252 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,252 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 114 flow. Second operand 4 states and 515 transitions. [2023-09-01 02:49:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-09-01 02:49:13,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:13,254 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-09-01 02:49:13,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-09-01 02:49:13,255 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-09-01 02:49:13,255 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-09-01 02:49:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:49:13,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:13,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:13,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:13,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash 619747813, now seen corresponding path program 1 times [2023-09-01 02:49:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:13,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308998355] [2023-09-01 02:49:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:13,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:13,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:13,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:13,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:49:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:49:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:13,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:13,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:13,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308998355] [2023-09-01 02:49:13,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308998355] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:13,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876184570] [2023-09-01 02:49:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:13,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-09-01 02:49:13,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:13,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-09-01 02:49:13,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:13,822 INFO L130 PetriNetUnfolder]: 366/672 cut-off events. [2023-09-01 02:49:13,822 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-09-01 02:49:13,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 672 events. 366/672 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3504 event pairs, 63 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1379. Up to 247 conditions per place. [2023-09-01 02:49:13,825 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 46 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-09-01 02:49:13,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 268 flow [2023-09-01 02:49:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:49:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:49:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-09-01 02:49:13,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338658146964856 [2023-09-01 02:49:13,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-09-01 02:49:13,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-09-01 02:49:13,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:13,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-09-01 02:49:13,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,835 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 679 transitions. [2023-09-01 02:49:13,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 268 flow [2023-09-01 02:49:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:49:13,849 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 154 flow [2023-09-01 02:49:13,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-09-01 02:49:13,850 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-09-01 02:49:13,850 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 154 flow [2023-09-01 02:49:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:13,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:13,850 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:49:13,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:14,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:14,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:14,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2029336737, now seen corresponding path program 2 times [2023-09-01 02:49:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:14,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712074428] [2023-09-01 02:49:14,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:49:14,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:14,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:14,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:14,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:49:14,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:49:14,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:49:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:14,244 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:14,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:14,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:14,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712074428] [2023-09-01 02:49:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712074428] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:14,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:14,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:49:14,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405655461] [2023-09-01 02:49:14,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:49:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:49:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:49:17,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-09-01 02:49:17,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:17,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-09-01 02:49:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:19,533 INFO L130 PetriNetUnfolder]: 1202/2134 cut-off events. [2023-09-01 02:49:19,533 INFO L131 PetriNetUnfolder]: For 1749/1865 co-relation queries the response was YES. [2023-09-01 02:49:19,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2134 events. 1202/2134 cut-off events. For 1749/1865 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13510 event pairs, 690 based on Foata normal form. 115/1686 useless extension candidates. Maximal degree in co-relation 5884. Up to 511 conditions per place. [2023-09-01 02:49:19,546 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 202 selfloop transitions, 12 changer transitions 0/217 dead transitions. [2023-09-01 02:49:19,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 217 transitions, 1286 flow [2023-09-01 02:49:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:49:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:49:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1690 transitions. [2023-09-01 02:49:19,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44994675186368477 [2023-09-01 02:49:19,551 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1690 transitions. [2023-09-01 02:49:19,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1690 transitions. [2023-09-01 02:49:19,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:19,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1690 transitions. [2023-09-01 02:49:19,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,584 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,584 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 154 flow. Second operand 12 states and 1690 transitions. [2023-09-01 02:49:19,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 217 transitions, 1286 flow [2023-09-01 02:49:19,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 217 transitions, 1286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:49:19,591 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 253 flow [2023-09-01 02:49:19,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-09-01 02:49:19,592 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-09-01 02:49:19,592 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 253 flow [2023-09-01 02:49:19,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:19,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:19,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:19,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:19,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1418062756, now seen corresponding path program 1 times [2023-09-01 02:49:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:19,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059156695] [2023-09-01 02:49:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:19,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:19,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:19,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:19,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:49:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:49:19,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:19,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:19,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059156695] [2023-09-01 02:49:19,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059156695] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:19,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100380566] [2023-09-01 02:49:19,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:19,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:19,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-09-01 02:49:19,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:19,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-09-01 02:49:19,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:20,342 INFO L130 PetriNetUnfolder]: 1091/1953 cut-off events. [2023-09-01 02:49:20,343 INFO L131 PetriNetUnfolder]: For 1635/1768 co-relation queries the response was YES. [2023-09-01 02:49:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1953 events. 1091/1953 cut-off events. For 1635/1768 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12287 event pairs, 630 based on Foata normal form. 110/1503 useless extension candidates. Maximal degree in co-relation 5405. Up to 1886 conditions per place. [2023-09-01 02:49:20,351 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 44 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 02:49:20,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 50 transitions, 380 flow [2023-09-01 02:49:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:49:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:49:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 551 transitions. [2023-09-01 02:49:20,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44009584664536744 [2023-09-01 02:49:20,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 551 transitions. [2023-09-01 02:49:20,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 551 transitions. [2023-09-01 02:49:20,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:20,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 551 transitions. [2023-09-01 02:49:20,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,357 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,357 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 253 flow. Second operand 4 states and 551 transitions. [2023-09-01 02:49:20,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 50 transitions, 380 flow [2023-09-01 02:49:20,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 50 transitions, 355 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 02:49:20,360 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 255 flow [2023-09-01 02:49:20,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-09-01 02:49:20,361 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-09-01 02:49:20,361 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 255 flow [2023-09-01 02:49:20,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:20,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:20,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:20,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:20,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash 374548029, now seen corresponding path program 1 times [2023-09-01 02:49:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:20,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208160564] [2023-09-01 02:49:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:20,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:20,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:49:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:49:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:20,693 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:20,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:20,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:21,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:21,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208160564] [2023-09-01 02:49:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208160564] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:21,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:49:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105824597] [2023-09-01 02:49:21,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:21,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:49:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:49:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:49:25,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 313 [2023-09-01 02:49:25,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:25,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:25,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 313 [2023-09-01 02:49:25,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:29,045 INFO L130 PetriNetUnfolder]: 890/1620 cut-off events. [2023-09-01 02:49:29,045 INFO L131 PetriNetUnfolder]: For 1779/1876 co-relation queries the response was YES. [2023-09-01 02:49:29,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4839 conditions, 1620 events. 890/1620 cut-off events. For 1779/1876 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9914 event pairs, 504 based on Foata normal form. 144/1537 useless extension candidates. Maximal degree in co-relation 4805. Up to 1249 conditions per place. [2023-09-01 02:49:29,059 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 68 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-09-01 02:49:29,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 574 flow [2023-09-01 02:49:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:49:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:49:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1270 transitions. [2023-09-01 02:49:29,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057507987220447 [2023-09-01 02:49:29,065 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1270 transitions. [2023-09-01 02:49:29,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1270 transitions. [2023-09-01 02:49:29,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:29,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1270 transitions. [2023-09-01 02:49:29,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.0) internal successors, (1270), 10 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,074 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 255 flow. Second operand 10 states and 1270 transitions. [2023-09-01 02:49:29,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 574 flow [2023-09-01 02:49:29,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 564 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 02:49:29,079 INFO L231 Difference]: Finished difference. Result has 74 places, 41 transitions, 293 flow [2023-09-01 02:49:29,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=293, PETRI_PLACES=74, PETRI_TRANSITIONS=41} [2023-09-01 02:49:29,081 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2023-09-01 02:49:29,081 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 41 transitions, 293 flow [2023-09-01 02:49:29,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:29,082 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:29,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:29,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:29,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 572523676, now seen corresponding path program 2 times [2023-09-01 02:49:29,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:29,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24637051] [2023-09-01 02:49:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:49:29,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:29,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:29,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:49:29,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:49:29,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:49:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:29,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:29,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:49:29,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:29,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:29,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24637051] [2023-09-01 02:49:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24637051] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:29,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163124602] [2023-09-01 02:49:29,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:29,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:29,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-09-01 02:49:29,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 41 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:29,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-09-01 02:49:29,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:29,842 INFO L130 PetriNetUnfolder]: 488/954 cut-off events. [2023-09-01 02:49:29,842 INFO L131 PetriNetUnfolder]: For 2436/2550 co-relation queries the response was YES. [2023-09-01 02:49:29,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 954 events. 488/954 cut-off events. For 2436/2550 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5351 event pairs, 252 based on Foata normal form. 215/1077 useless extension candidates. Maximal degree in co-relation 2813. Up to 902 conditions per place. [2023-09-01 02:49:29,847 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-09-01 02:49:29,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 38 transitions, 337 flow [2023-09-01 02:49:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:49:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:49:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-09-01 02:49:29,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185303514376997 [2023-09-01 02:49:29,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-09-01 02:49:29,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-09-01 02:49:29,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:29,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-09-01 02:49:29,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,852 INFO L175 Difference]: Start difference. First operand has 74 places, 41 transitions, 293 flow. Second operand 4 states and 524 transitions. [2023-09-01 02:49:29,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 38 transitions, 337 flow [2023-09-01 02:49:29,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 38 transitions, 284 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-09-01 02:49:29,855 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 228 flow [2023-09-01 02:49:29,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-09-01 02:49:29,856 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-09-01 02:49:29,870 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 228 flow [2023-09-01 02:49:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:29,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:29,870 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:49:29,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:30,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:30,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:30,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1856180289, now seen corresponding path program 3 times [2023-09-01 02:49:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864645348] [2023-09-01 02:49:30,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:49:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:30,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:30,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:49:30,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:49:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:49:30,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:30,319 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:49:30,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:49:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:30,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:32,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864645348] [2023-09-01 02:49:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864645348] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:32,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:49:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117942710] [2023-09-01 02:49:32,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:32,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:49:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:49:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:49:42,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-09-01 02:49:42,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 228 flow. Second operand has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:42,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:42,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-09-01 02:49:42,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:55,840 INFO L130 PetriNetUnfolder]: 1124/2178 cut-off events. [2023-09-01 02:49:55,840 INFO L131 PetriNetUnfolder]: For 3203/3359 co-relation queries the response was YES. [2023-09-01 02:49:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6438 conditions, 2178 events. 1124/2178 cut-off events. For 3203/3359 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12864 event pairs, 576 based on Foata normal form. 165/2310 useless extension candidates. Maximal degree in co-relation 6408. Up to 547 conditions per place. [2023-09-01 02:49:55,847 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 370 selfloop transitions, 24 changer transitions 0/397 dead transitions. [2023-09-01 02:49:55,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 397 transitions, 2548 flow [2023-09-01 02:49:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:49:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:49:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2023-09-01 02:49:55,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450212992545261 [2023-09-01 02:49:55,853 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2023-09-01 02:49:55,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2023-09-01 02:49:55,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:55,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2023-09-01 02:49:55,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:55,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:55,866 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:55,867 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 228 flow. Second operand 24 states and 3343 transitions. [2023-09-01 02:49:55,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 397 transitions, 2548 flow [2023-09-01 02:49:55,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 397 transitions, 2523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:49:55,874 INFO L231 Difference]: Finished difference. Result has 97 places, 51 transitions, 407 flow [2023-09-01 02:49:55,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=407, PETRI_PLACES=97, PETRI_TRANSITIONS=51} [2023-09-01 02:49:55,875 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2023-09-01 02:49:55,875 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 51 transitions, 407 flow [2023-09-01 02:49:55,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:55,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:55,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:55,897 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 [2023-09-01 02:49:56,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:56,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:56,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash -705117191, now seen corresponding path program 1 times [2023-09-01 02:49:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:56,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575934643] [2023-09-01 02:49:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:56,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:56,092 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:49:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:49:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:56,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:56,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:56,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575934643] [2023-09-01 02:49:56,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575934643] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:56,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775852175] [2023-09-01 02:49:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:56,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 313 [2023-09-01 02:49:56,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 51 transitions, 407 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:56,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:56,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 313 [2023-09-01 02:49:56,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:56,529 INFO L130 PetriNetUnfolder]: 1544/2912 cut-off events. [2023-09-01 02:49:56,529 INFO L131 PetriNetUnfolder]: For 3634/3809 co-relation queries the response was YES. [2023-09-01 02:49:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8568 conditions, 2912 events. 1544/2912 cut-off events. For 3634/3809 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17243 event pairs, 576 based on Foata normal form. 175/2875 useless extension candidates. Maximal degree in co-relation 8525. Up to 1901 conditions per place. [2023-09-01 02:49:56,537 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 48 selfloop transitions, 2 changer transitions 8/60 dead transitions. [2023-09-01 02:49:56,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 60 transitions, 553 flow [2023-09-01 02:49:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-09-01 02:49:56,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536741214057508 [2023-09-01 02:49:56,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-09-01 02:49:56,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-09-01 02:49:56,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:56,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-09-01 02:49:56,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:56,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:56,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:56,542 INFO L175 Difference]: Start difference. First operand has 97 places, 51 transitions, 407 flow. Second operand 3 states and 426 transitions. [2023-09-01 02:49:56,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 60 transitions, 553 flow [2023-09-01 02:49:56,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 60 transitions, 505 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 02:49:56,548 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 345 flow [2023-09-01 02:49:56,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2023-09-01 02:49:56,548 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-09-01 02:49:56,548 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 345 flow [2023-09-01 02:49:56,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:56,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:56,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:56,556 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 [2023-09-01 02:49:56,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:56,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:49:56,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 58817730, now seen corresponding path program 1 times [2023-09-01 02:49:56,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:56,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049852491] [2023-09-01 02:49:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:56,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:56,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:56,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:56,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:49:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:56,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-09-01 02:49:56,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 02:49:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:49:57,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:57,284 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 182 treesize of output 178 [2023-09-01 02:49:57,427 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 02:49:57,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 182 [2023-09-01 02:49:57,436 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 108 treesize of output 104 [2023-09-01 02:50:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:50:00,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049852491] [2023-09-01 02:50:00,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049852491] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:00,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:50:00,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:50:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5474697] [2023-09-01 02:50:00,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:50:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:50:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:50:01,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 313 [2023-09-01 02:50:01,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 345 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:01,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:01,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 313 [2023-09-01 02:50:01,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:02,763 INFO L130 PetriNetUnfolder]: 1443/2727 cut-off events. [2023-09-01 02:50:02,763 INFO L131 PetriNetUnfolder]: For 2389/2389 co-relation queries the response was YES. [2023-09-01 02:50:02,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 2727 events. 1443/2727 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 14586 event pairs, 80 based on Foata normal form. 20/2747 useless extension candidates. Maximal degree in co-relation 8130. Up to 881 conditions per place. [2023-09-01 02:50:02,792 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 55 selfloop transitions, 6 changer transitions 9/71 dead transitions. [2023-09-01 02:50:02,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 71 transitions, 565 flow [2023-09-01 02:50:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:50:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:50:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-09-01 02:50:02,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938840712003651 [2023-09-01 02:50:02,802 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-09-01 02:50:02,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-09-01 02:50:02,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:02,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-09-01 02:50:02,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:02,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:02,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:02,807 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 345 flow. Second operand 7 states and 863 transitions. [2023-09-01 02:50:02,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 71 transitions, 565 flow [2023-09-01 02:50:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 542 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 02:50:02,825 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 362 flow [2023-09-01 02:50:02,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2023-09-01 02:50:02,826 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-09-01 02:50:02,826 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 362 flow [2023-09-01 02:50:02,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:02,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:02,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:02,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:03,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:50:03,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 915687345, now seen corresponding path program 2 times [2023-09-01 02:50:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:03,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843394547] [2023-09-01 02:50:03,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:50:03,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:03,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:03,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:50:03,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:50:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:50:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:50:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:03,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 9 [2023-09-01 02:50:03,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-09-01 02:50:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:03,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:03,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 02:50:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 344 treesize of output 204 [2023-09-01 02:50:03,658 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 204 treesize of output 200 [2023-09-01 02:50:03,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 196 [2023-09-01 02:50:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:04,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843394547] [2023-09-01 02:50:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843394547] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:04,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:50:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-09-01 02:50:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716711050] [2023-09-01 02:50:04,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:50:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:04,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:50:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:50:04,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 313 [2023-09-01 02:50:04,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 362 flow. Second operand has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:04,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:04,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 313 [2023-09-01 02:50:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:05,750 INFO L130 PetriNetUnfolder]: 2151/3954 cut-off events. [2023-09-01 02:50:05,750 INFO L131 PetriNetUnfolder]: For 3104/3104 co-relation queries the response was YES. [2023-09-01 02:50:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11822 conditions, 3954 events. 2151/3954 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 22266 event pairs, 272 based on Foata normal form. 98/4052 useless extension candidates. Maximal degree in co-relation 11778. Up to 1475 conditions per place. [2023-09-01 02:50:05,785 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 6 changer transitions 39/96 dead transitions. [2023-09-01 02:50:05,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 706 flow [2023-09-01 02:50:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:50:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:50:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1569 transitions. [2023-09-01 02:50:05,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38559842713197345 [2023-09-01 02:50:05,791 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1569 transitions. [2023-09-01 02:50:05,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1569 transitions. [2023-09-01 02:50:05,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:05,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1569 transitions. [2023-09-01 02:50:05,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.6923076923077) internal successors, (1569), 13 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:05,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:05,807 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:05,807 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 362 flow. Second operand 13 states and 1569 transitions. [2023-09-01 02:50:05,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 706 flow [2023-09-01 02:50:05,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 692 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 02:50:05,829 INFO L231 Difference]: Finished difference. Result has 105 places, 50 transitions, 389 flow [2023-09-01 02:50:05,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=105, PETRI_TRANSITIONS=50} [2023-09-01 02:50:05,830 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2023-09-01 02:50:05,830 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 50 transitions, 389 flow [2023-09-01 02:50:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:05,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:05,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:05,841 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 [2023-09-01 02:50:06,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:06,042 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 02:50:06,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1263349585, now seen corresponding path program 3 times [2023-09-01 02:50:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:06,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938029405] [2023-09-01 02:50:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:50:06,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:06,044 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:06,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:50:06,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:50:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:50:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:50:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:06,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-09-01 02:50:06,861 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 21 treesize of output 17 [2023-09-01 02:50:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:50:07,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:16,184 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-09-01 02:50:16,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 708 treesize of output 564 [2023-09-01 02:50:16,201 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 317 treesize of output 309 [2023-09-01 02:50:16,223 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 309 treesize of output 301 [2023-09-01 02:54:05,640 WARN L222 SmtUtils]: Spent 15.35s on a formula simplification. DAG size of input: 2457 DAG size of output: 2610 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 02:57:15,804 WARN L222 SmtUtils]: Spent 53.50s on a formula simplification. DAG size of input: 4229 DAG size of output: 4250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 02:57:28,632 WARN L222 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 4182 DAG size of output: 4170 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 03:02:59,332 WARN L222 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 7569 DAG size of output: 7574 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15