./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/loop-tiling-eq.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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:09:46,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:09:46,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:09:46,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:09:46,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:09:46,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:09:46,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:09:46,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:09:46,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:09:46,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:09:46,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:09:46,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:09:46,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:09:46,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:09:46,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:09:46,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:09:46,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:09:46,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:09:46,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:09:46,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:09:46,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:09:46,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:09:46,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:09:46,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:09:46,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:09:46,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:09:46,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:09:46,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:09:46,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:09:46,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:09:46,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:09:46,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:09:46,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:09:46,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:09:46,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:09:46,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:09:46,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:09:46,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:09:46,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:09:46,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:09:46,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:09:46,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:09:46,218 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:09:46,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:09:46,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:09:46,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:09:46,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:09:46,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:09:46,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:09:46,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:09:46,221 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:09:46,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:09:46,222 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:09:46,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:09:46,223 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:09:46,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:09:46,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:09:46,224 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:09:46,224 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:09:46,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:09:46,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:09:46,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:09:46,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:09:46,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:09:46,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:09:46,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:09:46,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:09:46,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:09:46,226 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:09:46,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:09:46,227 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:09:46,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:09:46,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:09:46,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:09:46,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:09:46,554 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:09:46,554 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:09:46,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2023-08-29 23:09:47,686 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:09:47,915 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:09:47,915 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2023-08-29 23:09:47,923 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f10fbb7d0/0e21bc3f2bb349a792530d27d536c122/FLAGed795497b [2023-08-29 23:09:47,940 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f10fbb7d0/0e21bc3f2bb349a792530d27d536c122 [2023-08-29 23:09:47,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:09:47,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:09:47,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:09:47,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:09:47,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:09:47,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:09:47" (1/1) ... [2023-08-29 23:09:47,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2877e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:47, skipping insertion in model container [2023-08-29 23:09:47,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:09:47" (1/1) ... [2023-08-29 23:09:47,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:09:47,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:09:48,155 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/loop-tiling-eq.wvr.c[2618,2631] [2023-08-29 23:09:48,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:09:48,184 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:09:48,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@757425fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:48, skipping insertion in model container [2023-08-29 23:09:48,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:09:48,186 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:09:48,188 INFO L158 Benchmark]: Toolchain (without parser) took 239.76ms. Allocated memory is still 73.4MB. Free memory was 51.3MB in the beginning and 41.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:09:48,188 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:09:48,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.03ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 41.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:09:48,190 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.03ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 41.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 79]: 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/loop-tiling-eq.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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:09:49,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:09:49,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:09:49,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:09:49,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:09:49,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:09:49,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:09:49,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:09:49,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:09:49,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:09:49,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:09:49,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:09:49,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:09:49,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:09:49,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:09:49,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:09:49,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:09:49,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:09:49,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:09:49,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:09:49,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:09:49,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:09:49,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:09:49,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:09:49,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:09:49,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:09:49,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:09:49,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:09:49,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:09:49,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:09:49,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:09:49,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:09:49,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:09:49,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:09:49,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:09:49,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:09:49,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:09:49,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:09:49,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:09:49,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:09:49,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:09:49,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:09:49,962 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:09:49,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:09:49,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:09:49,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:09:49,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:09:49,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:09:49,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:09:49,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:09:49,965 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:09:49,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:09:49,966 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:09:49,967 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:09:49,968 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:09:49,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:09:49,968 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:09:49,968 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:09:49,968 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:09:49,969 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:09:49,969 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:09:49,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:09:49,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:09:49,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:09:49,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:09:49,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:09:49,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:09:49,970 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:09:49,970 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:09:49,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:09:49,971 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:09:49,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:09:49,971 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:09:49,971 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:09:49,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:09:50,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:09:50,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:09:50,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:09:50,268 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:09:50,268 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:09:50,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2023-08-29 23:09:51,491 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:09:51,687 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:09:51,688 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/loop-tiling-eq.wvr.c [2023-08-29 23:09:51,696 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986cd46f4/38f023a82333407bbe68a06899d3e0bf/FLAG544b536e1 [2023-08-29 23:09:51,712 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986cd46f4/38f023a82333407bbe68a06899d3e0bf [2023-08-29 23:09:51,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:09:51,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:09:51,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:09:51,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:09:51,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:09:51,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:09:51" (1/1) ... [2023-08-29 23:09:51,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c560f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:51, skipping insertion in model container [2023-08-29 23:09:51,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:09:51" (1/1) ... [2023-08-29 23:09:51,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:09:51,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:09:51,957 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/loop-tiling-eq.wvr.c[2618,2631] [2023-08-29 23:09:51,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:09:51,983 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:09:51,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:09:52,017 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/loop-tiling-eq.wvr.c[2618,2631] [2023-08-29 23:09:52,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:09:52,030 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:09:52,066 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/loop-tiling-eq.wvr.c[2618,2631] [2023-08-29 23:09:52,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:09:52,089 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:09:52,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52 WrapperNode [2023-08-29 23:09:52,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:09:52,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:09:52,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:09:52,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:09:52,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,147 INFO L138 Inliner]: procedures = 27, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 186 [2023-08-29 23:09:52,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:09:52,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:09:52,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:09:52,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:09:52,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,192 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:09:52,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:09:52,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:09:52,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:09:52,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (1/1) ... [2023-08-29 23:09:52,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:09:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:52,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:09:52,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:09:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:09:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:09:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 23:09:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:09:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:09:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-29 23:09:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:09:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:09:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:09:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:09:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:09:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:09:52,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:09:52,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:09:52,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:09:52,287 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:09:52,469 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:09:52,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:09:53,239 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:09:53,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:09:53,253 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-29 23:09:53,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:09:53 BoogieIcfgContainer [2023-08-29 23:09:53,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:09:53,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:09:53,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:09:53,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:09:53,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:09:51" (1/3) ... [2023-08-29 23:09:53,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a7247f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:09:53, skipping insertion in model container [2023-08-29 23:09:53,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:09:52" (2/3) ... [2023-08-29 23:09:53,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a7247f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:09:53, skipping insertion in model container [2023-08-29 23:09:53,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:09:53" (3/3) ... [2023-08-29 23:09:53,269 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2023-08-29 23:09:53,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:09:53,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-29 23:09:53,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:09:53,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:09:53,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 286 transitions, 588 flow [2023-08-29 23:09:53,557 INFO L130 PetriNetUnfolder]: 26/284 cut-off events. [2023-08-29 23:09:53,558 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:09:53,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 284 events. 26/284 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 453 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 203. Up to 2 conditions per place. [2023-08-29 23:09:53,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 286 transitions, 588 flow [2023-08-29 23:09:53,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 280 transitions, 572 flow [2023-08-29 23:09:53,578 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:09:53,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 280 transitions, 572 flow [2023-08-29 23:09:53,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 280 transitions, 572 flow [2023-08-29 23:09:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 280 transitions, 572 flow [2023-08-29 23:09:53,640 INFO L130 PetriNetUnfolder]: 26/280 cut-off events. [2023-08-29 23:09:53,641 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:09:53,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 280 events. 26/280 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 450 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 203. Up to 2 conditions per place. [2023-08-29 23:09:53,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-29 23:10:40,836 WARN L222 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 129 DAG size of output: 128 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 23:10:52,904 WARN L222 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 144 DAG size of output: 143 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-29 23:10:57,801 INFO L134 LiptonReduction]: Checked pairs total: 3431 [2023-08-29 23:10:57,802 INFO L136 LiptonReduction]: Total number of compositions: 321 [2023-08-29 23:10:57,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:10:57,817 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;@6e981b3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:10:57,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-29 23:10:57,819 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:10:57,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:10:57,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:57,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:10:57,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:10:57,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash 34484, now seen corresponding path program 1 times [2023-08-29 23:10:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:10:57,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107795682] [2023-08-29 23:10:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:57,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:10:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:10:57,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:10:57,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:10:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:10:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:58,151 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:10:58,152 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 [2023-08-29 23:10:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:58,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:10:58,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:10:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107795682] [2023-08-29 23:10:58,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107795682] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:10:58,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:10:58,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:10:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079966856] [2023-08-29 23:10:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:10:58,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:10:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:10:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:10:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:10:58,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 607 [2023-08-29 23:10:58,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:58,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:58,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 607 [2023-08-29 23:10:58,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:00,241 INFO L130 PetriNetUnfolder]: 1931/2894 cut-off events. [2023-08-29 23:11:00,242 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-08-29 23:11:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5772 conditions, 2894 events. 1931/2894 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 16181 event pairs, 1156 based on Foata normal form. 0/955 useless extension candidates. Maximal degree in co-relation 2626. Up to 1411 conditions per place. [2023-08-29 23:11:00,270 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 103 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2023-08-29 23:11:00,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 113 transitions, 470 flow [2023-08-29 23:11:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-08-29 23:11:00,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700713893465129 [2023-08-29 23:11:00,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-08-29 23:11:00,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-08-29 23:11:00,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:00,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-08-29 23:11:00,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:00,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:00,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:00,322 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 134 flow. Second operand 3 states and 856 transitions. [2023-08-29 23:11:00,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 113 transitions, 470 flow [2023-08-29 23:11:00,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 454 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:11:00,330 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 182 flow [2023-08-29 23:11:00,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-08-29 23:11:00,334 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2023-08-29 23:11:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 182 flow [2023-08-29 23:11:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:00,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:11:00,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:00,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:00,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:00,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 34483, now seen corresponding path program 1 times [2023-08-29 23:11:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:00,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087439791] [2023-08-29 23:11:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:00,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:00,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:00,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:11:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:11:00,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:00,695 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:11:00,696 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 [2023-08-29 23:11:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:00,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:11:00,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087439791] [2023-08-29 23:11:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087439791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:00,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:00,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:11:00,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510971630] [2023-08-29 23:11:00,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:00,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:11:00,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:11:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:11:00,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 607 [2023-08-29 23:11:00,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:00,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:00,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 607 [2023-08-29 23:11:00,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:01,718 INFO L130 PetriNetUnfolder]: 1931/2888 cut-off events. [2023-08-29 23:11:01,719 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 23:11:01,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5741 conditions, 2888 events. 1931/2888 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 16316 event pairs, 1156 based on Foata normal form. 4/961 useless extension candidates. Maximal degree in co-relation 2844. Up to 2808 conditions per place. [2023-08-29 23:11:01,733 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 59 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-29 23:11:01,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 296 flow [2023-08-29 23:11:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2023-08-29 23:11:01,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43986820428336076 [2023-08-29 23:11:01,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2023-08-29 23:11:01,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2023-08-29 23:11:01,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:01,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2023-08-29 23:11:01,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:01,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:01,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:01,746 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 182 flow. Second operand 3 states and 801 transitions. [2023-08-29 23:11:01,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 296 flow [2023-08-29 23:11:01,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:11:01,748 INFO L231 Difference]: Finished difference. Result has 57 places, 63 transitions, 164 flow [2023-08-29 23:11:01,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=57, PETRI_TRANSITIONS=63} [2023-08-29 23:11:01,749 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-29 23:11:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 63 transitions, 164 flow [2023-08-29 23:11:01,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:01,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:01,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:11:01,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:01,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:01,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:01,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1073139, now seen corresponding path program 1 times [2023-08-29 23:11:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743420014] [2023-08-29 23:11:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:01,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:01,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:01,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:01,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:11:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:11:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:02,194 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:11:02,195 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 [2023-08-29 23:11:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:02,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:02,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:02,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743420014] [2023-08-29 23:11:02,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743420014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:02,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:11:02,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:11:02,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403939851] [2023-08-29 23:11:02,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:02,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:11:02,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:11:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:11:03,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 607 [2023-08-29 23:11:03,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:03,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:03,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 607 [2023-08-29 23:11:03,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:05,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:08,177 INFO L130 PetriNetUnfolder]: 2906/4346 cut-off events. [2023-08-29 23:11:08,178 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 23:11:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 4346 events. 2906/4346 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 26072 event pairs, 1734 based on Foata normal form. 0/1448 useless extension candidates. Maximal degree in co-relation 8628. Up to 1410 conditions per place. [2023-08-29 23:11:08,194 INFO L137 encePairwiseOnDemand]: 594/607 looper letters, 141 selfloop transitions, 29 changer transitions 0/173 dead transitions. [2023-08-29 23:11:08,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 173 transitions, 764 flow [2023-08-29 23:11:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:11:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:11:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1571 transitions. [2023-08-29 23:11:08,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313563975837452 [2023-08-29 23:11:08,199 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1571 transitions. [2023-08-29 23:11:08,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1571 transitions. [2023-08-29 23:11:08,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:08,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1571 transitions. [2023-08-29 23:11:08,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.8333333333333) internal successors, (1571), 6 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:08,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:08,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:08,211 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 164 flow. Second operand 6 states and 1571 transitions. [2023-08-29 23:11:08,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 173 transitions, 764 flow [2023-08-29 23:11:08,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 173 transitions, 763 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:08,214 INFO L231 Difference]: Finished difference. Result has 65 places, 85 transitions, 382 flow [2023-08-29 23:11:08,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=65, PETRI_TRANSITIONS=85} [2023-08-29 23:11:08,215 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-29 23:11:08,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 85 transitions, 382 flow [2023-08-29 23:11:08,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:08,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:08,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:11:08,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:08,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:08,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 33305913, now seen corresponding path program 1 times [2023-08-29 23:11:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801358776] [2023-08-29 23:11:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:08,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:08,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:08,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:11:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:11:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:08,665 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:11:08,666 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 [2023-08-29 23:11:08,689 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 [2023-08-29 23:11:08,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:08,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:11:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:08,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:11:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:08,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:11:08,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:08,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801358776] [2023-08-29 23:11:08,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801358776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:08,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:08,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:11:08,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573904641] [2023-08-29 23:11:08,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:08,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:11:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:11:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:11:09,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 607 [2023-08-29 23:11:09,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 85 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:09,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:09,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 607 [2023-08-29 23:11:09,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:10,024 INFO L130 PetriNetUnfolder]: 2186/3335 cut-off events. [2023-08-29 23:11:10,024 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-29 23:11:10,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3335 events. 2186/3335 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 19751 event pairs, 1284 based on Foata normal form. 0/1208 useless extension candidates. Maximal degree in co-relation 6713. Up to 3239 conditions per place. [2023-08-29 23:11:10,056 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 79 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-08-29 23:11:10,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 538 flow [2023-08-29 23:11:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 813 transitions. [2023-08-29 23:11:10,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464579901153213 [2023-08-29 23:11:10,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 813 transitions. [2023-08-29 23:11:10,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 813 transitions. [2023-08-29 23:11:10,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:10,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 813 transitions. [2023-08-29 23:11:10,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:10,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:10,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:10,071 INFO L175 Difference]: Start difference. First operand has 65 places, 85 transitions, 382 flow. Second operand 3 states and 813 transitions. [2023-08-29 23:11:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 538 flow [2023-08-29 23:11:10,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 503 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:10,079 INFO L231 Difference]: Finished difference. Result has 64 places, 83 transitions, 345 flow [2023-08-29 23:11:10,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=64, PETRI_TRANSITIONS=83} [2023-08-29 23:11:10,080 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-29 23:11:10,080 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 83 transitions, 345 flow [2023-08-29 23:11:10,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:10,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:10,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:11:10,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:10,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:10,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 33305914, now seen corresponding path program 1 times [2023-08-29 23:11:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315519637] [2023-08-29 23:11:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:10,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:10,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:10,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:11:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:11:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:10,470 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-29 23:11:10,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 23:11:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:10,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:11:10,554 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:11:10,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:11:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:10,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:11:10,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:10,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315519637] [2023-08-29 23:11:10,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315519637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:10,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:10,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:11:10,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34978061] [2023-08-29 23:11:10,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:10,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:11:10,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:11:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:11:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 607 [2023-08-29 23:11:10,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 83 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:10,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:10,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 607 [2023-08-29 23:11:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:11,648 INFO L130 PetriNetUnfolder]: 1466/2324 cut-off events. [2023-08-29 23:11:11,649 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-29 23:11:11,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 2324 events. 1466/2324 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 13477 event pairs, 834 based on Foata normal form. 0/965 useless extension candidates. Maximal degree in co-relation 4697. Up to 2252 conditions per place. [2023-08-29 23:11:11,657 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 77 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-08-29 23:11:11,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 497 flow [2023-08-29 23:11:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:11:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:11:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2023-08-29 23:11:11,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486545853926414 [2023-08-29 23:11:11,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2023-08-29 23:11:11,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2023-08-29 23:11:11,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:11,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2023-08-29 23:11:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:11,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:11,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:11,686 INFO L175 Difference]: Start difference. First operand has 64 places, 83 transitions, 345 flow. Second operand 3 states and 817 transitions. [2023-08-29 23:11:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 497 flow [2023-08-29 23:11:11,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:11,690 INFO L231 Difference]: Finished difference. Result has 63 places, 81 transitions, 342 flow [2023-08-29 23:11:11,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=63, PETRI_TRANSITIONS=81} [2023-08-29 23:11:11,694 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-29 23:11:11,694 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 81 transitions, 342 flow [2023-08-29 23:11:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:11,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:11,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:11:11,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:11,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:11,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1032487659, now seen corresponding path program 1 times [2023-08-29 23:11:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:11,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898329126] [2023-08-29 23:11:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:11,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:11,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:11,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:11:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:11:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:12,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:11:12,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:11:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:11:12,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:11:12,128 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:11:12,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:11:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:12,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:11:12,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898329126] [2023-08-29 23:11:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898329126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:11:12,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:11:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:11:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036964981] [2023-08-29 23:11:12,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:11:12,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:11:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:11:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:11:13,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 607 [2023-08-29 23:11:13,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 81 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:13,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:13,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 607 [2023-08-29 23:11:13,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:14,546 INFO L130 PetriNetUnfolder]: 2132/3337 cut-off events. [2023-08-29 23:11:14,546 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-29 23:11:14,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 3337 events. 2132/3337 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 19844 event pairs, 956 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 6730. Up to 2252 conditions per place. [2023-08-29 23:11:14,556 INFO L137 encePairwiseOnDemand]: 590/607 looper letters, 129 selfloop transitions, 18 changer transitions 0/150 dead transitions. [2023-08-29 23:11:14,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 150 transitions, 824 flow [2023-08-29 23:11:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:11:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:11:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1331 transitions. [2023-08-29 23:11:14,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385502471169687 [2023-08-29 23:11:14,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1331 transitions. [2023-08-29 23:11:14,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1331 transitions. [2023-08-29 23:11:14,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:14,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1331 transitions. [2023-08-29 23:11:14,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 266.2) internal successors, (1331), 5 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:14,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:14,570 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:14,570 INFO L175 Difference]: Start difference. First operand has 63 places, 81 transitions, 342 flow. Second operand 5 states and 1331 transitions. [2023-08-29 23:11:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 150 transitions, 824 flow [2023-08-29 23:11:14,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 150 transitions, 823 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:11:14,573 INFO L231 Difference]: Finished difference. Result has 68 places, 93 transitions, 491 flow [2023-08-29 23:11:14,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=68, PETRI_TRANSITIONS=93} [2023-08-29 23:11:14,574 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-29 23:11:14,574 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 93 transitions, 491 flow [2023-08-29 23:11:14,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:14,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:14,575 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:11:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:14,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:14,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:11:14,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1909218932, now seen corresponding path program 2 times [2023-08-29 23:11:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:11:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440425515] [2023-08-29 23:11:14,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:11:14,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:11:14,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:11:14,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:11:14,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:11:14,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:11:14,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:14,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:11:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:15,009 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:11:15,010 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 [2023-08-29 23:11:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:15,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:15,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:11:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440425515] [2023-08-29 23:11:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440425515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:15,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:11:15,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:11:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949957419] [2023-08-29 23:11:15,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:11:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:11:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:11:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:11:23,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 607 [2023-08-29 23:11:23,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 93 transitions, 491 flow. Second operand has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:23,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:23,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 607 [2023-08-29 23:11:23,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:27,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:28,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:30,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:32,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:34,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:36,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:38,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:39,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:41,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:43,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:44,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:46,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:48,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:49,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:53,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:11:55,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:12:01,934 INFO L130 PetriNetUnfolder]: 6189/9723 cut-off events. [2023-08-29 23:12:01,934 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-08-29 23:12:01,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21112 conditions, 9723 events. 6189/9723 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 65943 event pairs, 3492 based on Foata normal form. 20/4561 useless extension candidates. Maximal degree in co-relation 21094. Up to 1726 conditions per place. [2023-08-29 23:12:01,972 INFO L137 encePairwiseOnDemand]: 594/607 looper letters, 434 selfloop transitions, 70 changer transitions 0/507 dead transitions. [2023-08-29 23:12:01,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 507 transitions, 3071 flow [2023-08-29 23:12:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:12:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:12:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4015 transitions. [2023-08-29 23:12:01,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44096650192202086 [2023-08-29 23:12:01,987 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4015 transitions. [2023-08-29 23:12:01,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4015 transitions. [2023-08-29 23:12:01,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:01,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4015 transitions. [2023-08-29 23:12:01,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 267.6666666666667) internal successors, (4015), 15 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 607.0) internal successors, (9712), 16 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,009 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 607.0) internal successors, (9712), 16 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,009 INFO L175 Difference]: Start difference. First operand has 68 places, 93 transitions, 491 flow. Second operand 15 states and 4015 transitions. [2023-08-29 23:12:02,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 507 transitions, 3071 flow [2023-08-29 23:12:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 507 transitions, 3047 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:12:02,026 INFO L231 Difference]: Finished difference. Result has 89 places, 139 transitions, 1093 flow [2023-08-29 23:12:02,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1093, PETRI_PLACES=89, PETRI_TRANSITIONS=139} [2023-08-29 23:12:02,027 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 28 predicate places. [2023-08-29 23:12:02,028 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 139 transitions, 1093 flow [2023-08-29 23:12:02,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:02,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:12:02,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:02,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:02,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:12:02,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1942236765, now seen corresponding path program 1 times [2023-08-29 23:12:02,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:12:02,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121730777] [2023-08-29 23:12:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:02,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:12:02,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:12:02,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:12:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:12:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:02,464 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 23:12:02,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 23:12:02,477 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 42 treesize of output 38 [2023-08-29 23:12:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:02,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:12:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:02,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:12:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:02,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:12:02,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:12:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121730777] [2023-08-29 23:12:02,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121730777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:12:02,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:12:02,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:12:02,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696744919] [2023-08-29 23:12:02,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:12:02,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:12:02,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:12:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:12:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:12:03,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 607 [2023-08-29 23:12:03,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 139 transitions, 1093 flow. Second operand has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:03,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:03,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 607 [2023-08-29 23:12:03,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:12:04,674 INFO L130 PetriNetUnfolder]: 5877/9179 cut-off events. [2023-08-29 23:12:04,674 INFO L131 PetriNetUnfolder]: For 1066/1066 co-relation queries the response was YES. [2023-08-29 23:12:04,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20165 conditions, 9179 events. 5877/9179 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 61328 event pairs, 3294 based on Foata normal form. 0/4406 useless extension candidates. Maximal degree in co-relation 20138. Up to 8881 conditions per place. [2023-08-29 23:12:04,713 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 133 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-08-29 23:12:04,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 1357 flow [2023-08-29 23:12:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:12:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:12:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2023-08-29 23:12:04,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44096650192202086 [2023-08-29 23:12:04,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2023-08-29 23:12:04,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2023-08-29 23:12:04,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:04,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2023-08-29 23:12:04,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:04,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:04,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:04,738 INFO L175 Difference]: Start difference. First operand has 89 places, 139 transitions, 1093 flow. Second operand 3 states and 803 transitions. [2023-08-29 23:12:04,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 1357 flow [2023-08-29 23:12:04,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1266 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-29 23:12:04,752 INFO L231 Difference]: Finished difference. Result has 87 places, 137 transitions, 1000 flow [2023-08-29 23:12:04,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1000, PETRI_PLACES=87, PETRI_TRANSITIONS=137} [2023-08-29 23:12:04,754 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 26 predicate places. [2023-08-29 23:12:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 137 transitions, 1000 flow [2023-08-29 23:12:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:04,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:04,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:12:04,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:04,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:04,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:12:04,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1942236766, now seen corresponding path program 1 times [2023-08-29 23:12:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:12:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147311654] [2023-08-29 23:12:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:04,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:12:04,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:12:04,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:12:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:05,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:12:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:05,170 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:12:05,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-29 23:12:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:05,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:12:05,244 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:12:05,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:12:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:05,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:12:05,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:12:05,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147311654] [2023-08-29 23:12:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147311654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:12:05,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:12:05,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:12:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138000329] [2023-08-29 23:12:05,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:12:05,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:12:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:12:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:12:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:12:05,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 607 [2023-08-29 23:12:05,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 137 transitions, 1000 flow. Second operand has 4 states, 4 states have (on average 251.5) internal successors, (1006), 4 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:05,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:05,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 607 [2023-08-29 23:12:05,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:12:07,158 INFO L130 PetriNetUnfolder]: 5565/8633 cut-off events. [2023-08-29 23:12:07,158 INFO L131 PetriNetUnfolder]: For 1082/1082 co-relation queries the response was YES. [2023-08-29 23:12:07,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18946 conditions, 8633 events. 5565/8633 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 56658 event pairs, 3096 based on Foata normal form. 0/4295 useless extension candidates. Maximal degree in co-relation 18918. Up to 8335 conditions per place. [2023-08-29 23:12:07,235 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 131 selfloop transitions, 1 changer transitions 0/135 dead transitions. [2023-08-29 23:12:07,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1260 flow [2023-08-29 23:12:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:12:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:12:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-08-29 23:12:07,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382207578253707 [2023-08-29 23:12:07,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-08-29 23:12:07,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-08-29 23:12:07,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:07,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-08-29 23:12:07,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:07,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:07,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:07,250 INFO L175 Difference]: Start difference. First operand has 87 places, 137 transitions, 1000 flow. Second operand 3 states and 798 transitions. [2023-08-29 23:12:07,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1260 flow [2023-08-29 23:12:07,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:12:07,267 INFO L231 Difference]: Finished difference. Result has 86 places, 135 transitions, 997 flow [2023-08-29 23:12:07,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=997, PETRI_PLACES=86, PETRI_TRANSITIONS=135} [2023-08-29 23:12:07,268 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2023-08-29 23:12:07,268 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 135 transitions, 997 flow [2023-08-29 23:12:07,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.5) internal successors, (1006), 4 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:07,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:07,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:12:07,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:07,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:07,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:12:07,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash 79789042, now seen corresponding path program 1 times [2023-08-29 23:12:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:12:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126294509] [2023-08-29 23:12:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:12:07,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:12:07,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:12:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:12:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:07,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:12:07,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:12:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126294509] [2023-08-29 23:12:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126294509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:12:07,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:12:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:12:07,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648196830] [2023-08-29 23:12:07,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:12:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:12:07,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:12:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:12:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:12:07,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 607 [2023-08-29 23:12:07,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 135 transitions, 997 flow. Second operand has 5 states, 5 states have (on average 246.4) internal successors, (1232), 5 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:07,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:07,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 607 [2023-08-29 23:12:07,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:12:10,288 INFO L130 PetriNetUnfolder]: 5624/9928 cut-off events. [2023-08-29 23:12:10,288 INFO L131 PetriNetUnfolder]: For 1813/1813 co-relation queries the response was YES. [2023-08-29 23:12:10,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22525 conditions, 9928 events. 5624/9928 cut-off events. For 1813/1813 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 73483 event pairs, 3281 based on Foata normal form. 1/6356 useless extension candidates. Maximal degree in co-relation 22496. Up to 7087 conditions per place. [2023-08-29 23:12:10,328 INFO L137 encePairwiseOnDemand]: 595/607 looper letters, 250 selfloop transitions, 18 changer transitions 0/270 dead transitions. [2023-08-29 23:12:10,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 270 transitions, 2251 flow [2023-08-29 23:12:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:12:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:12:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1865 transitions. [2023-08-29 23:12:10,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389268063073664 [2023-08-29 23:12:10,337 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1865 transitions. [2023-08-29 23:12:10,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1865 transitions. [2023-08-29 23:12:10,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:10,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1865 transitions. [2023-08-29 23:12:10,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 266.42857142857144) internal successors, (1865), 7 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:10,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:10,347 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:10,348 INFO L175 Difference]: Start difference. First operand has 86 places, 135 transitions, 997 flow. Second operand 7 states and 1865 transitions. [2023-08-29 23:12:10,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 270 transitions, 2251 flow [2023-08-29 23:12:10,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 270 transitions, 2250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:12:10,367 INFO L231 Difference]: Finished difference. Result has 95 places, 139 transitions, 1105 flow [2023-08-29 23:12:10,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1105, PETRI_PLACES=95, PETRI_TRANSITIONS=139} [2023-08-29 23:12:10,368 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2023-08-29 23:12:10,368 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 139 transitions, 1105 flow [2023-08-29 23:12:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.4) internal successors, (1232), 5 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:10,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:10,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-29 23:12:10,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:10,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:12:10,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 83260101, now seen corresponding path program 1 times [2023-08-29 23:12:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:12:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73296724] [2023-08-29 23:12:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:10,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:12:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:12:10,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:12:10,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:12:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:12:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:10,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:12:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:12:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:10,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:12:10,883 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:12:10,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:12:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:12:10,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-08-29 23:12:11,002 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:12:11,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:12:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:11,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:12:13,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:12:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2023-08-29 23:12:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 23:12:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 23:12:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:15,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:12:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73296724] [2023-08-29 23:12:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73296724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:12:15,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:12:15,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:12:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304880350] [2023-08-29 23:12:15,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:12:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:12:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:12:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:12:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2023-08-29 23:12:17,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:20,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:22,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:24,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:26,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:29,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:32,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:34,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:36,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:38,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:41,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:43,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:45,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:47,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:49,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:51,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:54,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:57,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:12:59,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:01,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:03,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:06,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:08,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:11,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:13,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:15,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:17,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:20,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:22,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:24,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:26,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:29,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:31,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:33,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:35,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:37,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:39,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:42,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:44,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:47,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:49,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:51,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:53,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:55,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:13:57,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:00,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:03,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:05,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:07,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:14:07,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 607 [2023-08-29 23:14:07,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 139 transitions, 1105 flow. Second operand has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:07,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:07,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 607 [2023-08-29 23:14:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:14:21,694 WARN L222 SmtUtils]: Spent 13.17s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:14:39,120 WARN L222 SmtUtils]: Spent 16.93s on a formula simplification. DAG size of input: 71 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:14:45,911 INFO L130 PetriNetUnfolder]: 17634/28175 cut-off events. [2023-08-29 23:14:45,912 INFO L131 PetriNetUnfolder]: For 9219/9938 co-relation queries the response was YES. [2023-08-29 23:14:45,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78133 conditions, 28175 events. 17634/28175 cut-off events. For 9219/9938 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 227609 event pairs, 10008 based on Foata normal form. 979/17195 useless extension candidates. Maximal degree in co-relation 78099. Up to 8702 conditions per place. [2023-08-29 23:14:46,027 INFO L137 encePairwiseOnDemand]: 589/607 looper letters, 275 selfloop transitions, 75 changer transitions 0/354 dead transitions. [2023-08-29 23:14:46,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 354 transitions, 3123 flow [2023-08-29 23:14:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:14:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:14:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2194 transitions. [2023-08-29 23:14:46,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285906844391194 [2023-08-29 23:14:46,036 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2194 transitions. [2023-08-29 23:14:46,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2194 transitions. [2023-08-29 23:14:46,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:14:46,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2194 transitions. [2023-08-29 23:14:46,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 199.45454545454547) internal successors, (2194), 11 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:46,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 607.0) internal successors, (7284), 12 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:46,048 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 607.0) internal successors, (7284), 12 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:46,048 INFO L175 Difference]: Start difference. First operand has 95 places, 139 transitions, 1105 flow. Second operand 11 states and 2194 transitions. [2023-08-29 23:14:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 354 transitions, 3123 flow [2023-08-29 23:14:46,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 354 transitions, 3121 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 23:14:46,117 INFO L231 Difference]: Finished difference. Result has 110 places, 185 transitions, 1832 flow [2023-08-29 23:14:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1832, PETRI_PLACES=110, PETRI_TRANSITIONS=185} [2023-08-29 23:14:46,118 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 49 predicate places. [2023-08-29 23:14:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 185 transitions, 1832 flow [2023-08-29 23:14:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:46,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:14:46,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:14:46,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:14:46,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:14:46,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:14:46,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:14:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash -374313648, now seen corresponding path program 1 times [2023-08-29 23:14:46,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:14:46,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895144352] [2023-08-29 23:14:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:14:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:14:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:14:46,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:14:46,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:14:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:14:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:14:46,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:14:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:47,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:14:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:47,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:14:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895144352] [2023-08-29 23:14:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895144352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:14:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:14:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 23:14:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921682055] [2023-08-29 23:14:47,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:14:47,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:14:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:14:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:14:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:14:51,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:14:56,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:14:57,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 607 [2023-08-29 23:14:57,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 185 transitions, 1832 flow. Second operand has 10 states, 10 states have (on average 236.4) internal successors, (2364), 10 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:57,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:57,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 607 [2023-08-29 23:14:57,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:15:00,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:15:02,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:15:05,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:15:16,429 INFO L130 PetriNetUnfolder]: 32546/54520 cut-off events. [2023-08-29 23:15:16,430 INFO L131 PetriNetUnfolder]: For 24129/26046 co-relation queries the response was YES. [2023-08-29 23:15:16,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149947 conditions, 54520 events. 32546/54520 cut-off events. For 24129/26046 co-relation queries the response was YES. Maximal size of possible extension queue 3065. Compared 514663 event pairs, 19578 based on Foata normal form. 1923/35745 useless extension candidates. Maximal degree in co-relation 149906. Up to 23664 conditions per place. [2023-08-29 23:15:16,745 INFO L137 encePairwiseOnDemand]: 590/607 looper letters, 208 selfloop transitions, 247 changer transitions 0/460 dead transitions. [2023-08-29 23:15:16,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 460 transitions, 5515 flow [2023-08-29 23:15:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:15:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:15:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3188 transitions. [2023-08-29 23:15:16,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40400456215942215 [2023-08-29 23:15:16,759 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3188 transitions. [2023-08-29 23:15:16,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3188 transitions. [2023-08-29 23:15:16,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:15:16,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3188 transitions. [2023-08-29 23:15:16,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 245.23076923076923) internal successors, (3188), 13 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:16,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:16,769 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:16,770 INFO L175 Difference]: Start difference. First operand has 110 places, 185 transitions, 1832 flow. Second operand 13 states and 3188 transitions. [2023-08-29 23:15:16,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 460 transitions, 5515 flow [2023-08-29 23:15:16,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 460 transitions, 5368 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-08-29 23:15:16,964 INFO L231 Difference]: Finished difference. Result has 123 places, 345 transitions, 4468 flow [2023-08-29 23:15:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4468, PETRI_PLACES=123, PETRI_TRANSITIONS=345} [2023-08-29 23:15:16,965 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 62 predicate places. [2023-08-29 23:15:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 345 transitions, 4468 flow [2023-08-29 23:15:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.4) internal successors, (2364), 10 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:16,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:15:16,965 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-08-29 23:15:16,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:15:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:15:17,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:15:17,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:15:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1591356386, now seen corresponding path program 1 times [2023-08-29 23:15:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:15:17,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644933652] [2023-08-29 23:15:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:15:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:15:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:15:17,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:15:17,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:15:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:15:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:15:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:15:17,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:15:17,396 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:15:17,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:15:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:15:17,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:15:17,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:15:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644933652] [2023-08-29 23:15:17,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644933652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:15:17,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:15:17,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:15:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971145124] [2023-08-29 23:15:17,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:15:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:15:17,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:15:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:15:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:15:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 607 [2023-08-29 23:15:18,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 345 transitions, 4468 flow. Second operand has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:18,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:15:18,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 607 [2023-08-29 23:15:18,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:15:25,281 INFO L130 PetriNetUnfolder]: 30711/51345 cut-off events. [2023-08-29 23:15:25,281 INFO L131 PetriNetUnfolder]: For 26572/28309 co-relation queries the response was YES. [2023-08-29 23:15:25,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139675 conditions, 51345 events. 30711/51345 cut-off events. For 26572/28309 co-relation queries the response was YES. Maximal size of possible extension queue 2937. Compared 480958 event pairs, 18258 based on Foata normal form. 2982/34249 useless extension candidates. Maximal degree in co-relation 139629. Up to 48982 conditions per place. [2023-08-29 23:15:25,585 INFO L137 encePairwiseOnDemand]: 602/607 looper letters, 324 selfloop transitions, 27 changer transitions 0/356 dead transitions. [2023-08-29 23:15:25,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 356 transitions, 5081 flow [2023-08-29 23:15:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:15:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:15:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1031 transitions. [2023-08-29 23:15:25,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42462932454695224 [2023-08-29 23:15:25,592 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1031 transitions. [2023-08-29 23:15:25,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1031 transitions. [2023-08-29 23:15:25,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:15:25,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1031 transitions. [2023-08-29 23:15:25,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.75) internal successors, (1031), 4 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:25,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:25,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:25,596 INFO L175 Difference]: Start difference. First operand has 123 places, 345 transitions, 4468 flow. Second operand 4 states and 1031 transitions. [2023-08-29 23:15:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 356 transitions, 5081 flow [2023-08-29 23:15:25,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 356 transitions, 4999 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-29 23:15:25,772 INFO L231 Difference]: Finished difference. Result has 122 places, 332 transitions, 4262 flow [2023-08-29 23:15:25,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4262, PETRI_PLACES=122, PETRI_TRANSITIONS=332} [2023-08-29 23:15:25,774 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 61 predicate places. [2023-08-29 23:15:25,774 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 332 transitions, 4262 flow [2023-08-29 23:15:25,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:25,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:15:25,774 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1] [2023-08-29 23:15:25,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:15:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:15:25,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:15:25,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:15:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -95936073, now seen corresponding path program 1 times [2023-08-29 23:15:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:15:25,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494673985] [2023-08-29 23:15:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:15:25,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:15:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:15:25,990 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:15:25,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:15:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:15:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:15:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:15:26,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:15:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:15:26,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:15:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:15:27,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:15:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494673985] [2023-08-29 23:15:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494673985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:15:27,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:15:28,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-08-29 23:15:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565895951] [2023-08-29 23:15:28,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:15:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:15:28,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:15:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:15:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:15:52,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 607 [2023-08-29 23:15:52,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 332 transitions, 4262 flow. Second operand has 17 states, 17 states have (on average 228.11764705882354) internal successors, (3878), 17 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:52,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:15:52,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 607 [2023-08-29 23:15:52,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:16:05,023 INFO L130 PetriNetUnfolder]: 30708/51338 cut-off events. [2023-08-29 23:16:05,024 INFO L131 PetriNetUnfolder]: For 18972/20709 co-relation queries the response was YES. [2023-08-29 23:16:05,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139530 conditions, 51338 events. 30708/51338 cut-off events. For 18972/20709 co-relation queries the response was YES. Maximal size of possible extension queue 2957. Compared 481413 event pairs, 18258 based on Foata normal form. 1739/32999 useless extension candidates. Maximal degree in co-relation 139484. Up to 48961 conditions per place. [2023-08-29 23:16:05,325 INFO L137 encePairwiseOnDemand]: 598/607 looper letters, 312 selfloop transitions, 47 changer transitions 0/364 dead transitions. [2023-08-29 23:16:05,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 364 transitions, 5122 flow [2023-08-29 23:16:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 23:16:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 23:16:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3738 transitions. [2023-08-29 23:16:05,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848846787479407 [2023-08-29 23:16:05,336 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3738 transitions. [2023-08-29 23:16:05,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3738 transitions. [2023-08-29 23:16:05,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:16:05,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3738 transitions. [2023-08-29 23:16:05,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 233.625) internal successors, (3738), 16 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:05,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 607.0) internal successors, (10319), 17 states have internal predecessors, (10319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:05,348 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 607.0) internal successors, (10319), 17 states have internal predecessors, (10319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:05,348 INFO L175 Difference]: Start difference. First operand has 122 places, 332 transitions, 4262 flow. Second operand 16 states and 3738 transitions. [2023-08-29 23:16:05,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 364 transitions, 5122 flow [2023-08-29 23:16:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 364 transitions, 5074 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:16:05,486 INFO L231 Difference]: Finished difference. Result has 141 places, 340 transitions, 4400 flow [2023-08-29 23:16:05,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4400, PETRI_PLACES=141, PETRI_TRANSITIONS=340} [2023-08-29 23:16:05,486 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 80 predicate places. [2023-08-29 23:16:05,487 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 340 transitions, 4400 flow [2023-08-29 23:16:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 228.11764705882354) internal successors, (3878), 17 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:05,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:16:05,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:16:05,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:16:05,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:05,693 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:16:05,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:16:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2138180904, now seen corresponding path program 1 times [2023-08-29 23:16:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:16:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868523591] [2023-08-29 23:16:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:16:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:16:05,701 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:16:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:16:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:16:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:16:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:16:05,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:16:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:06,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:16:06,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:16:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868523591] [2023-08-29 23:16:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868523591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:16:06,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:16:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:16:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912577756] [2023-08-29 23:16:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:16:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:16:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:16:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:16:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:16:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 607 [2023-08-29 23:16:07,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 340 transitions, 4400 flow. Second operand has 6 states, 6 states have (on average 246.66666666666666) internal successors, (1480), 6 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:07,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:16:07,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 607 [2023-08-29 23:16:07,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:16:15,315 INFO L130 PetriNetUnfolder]: 30875/51573 cut-off events. [2023-08-29 23:16:15,316 INFO L131 PetriNetUnfolder]: For 18953/20799 co-relation queries the response was YES. [2023-08-29 23:16:15,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141374 conditions, 51573 events. 30875/51573 cut-off events. For 18953/20799 co-relation queries the response was YES. Maximal size of possible extension queue 2878. Compared 477204 event pairs, 19371 based on Foata normal form. 1846/34086 useless extension candidates. Maximal degree in co-relation 141321. Up to 49719 conditions per place. [2023-08-29 23:16:15,665 INFO L137 encePairwiseOnDemand]: 595/607 looper letters, 351 selfloop transitions, 36 changer transitions 0/391 dead transitions. [2023-08-29 23:16:15,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 391 transitions, 5373 flow [2023-08-29 23:16:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:16:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:16:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1564 transitions. [2023-08-29 23:16:15,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294343767160901 [2023-08-29 23:16:15,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1564 transitions. [2023-08-29 23:16:15,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1564 transitions. [2023-08-29 23:16:15,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:16:15,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1564 transitions. [2023-08-29 23:16:15,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.6666666666667) internal successors, (1564), 6 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:15,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:15,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:15,677 INFO L175 Difference]: Start difference. First operand has 141 places, 340 transitions, 4400 flow. Second operand 6 states and 1564 transitions. [2023-08-29 23:16:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 391 transitions, 5373 flow [2023-08-29 23:16:15,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 391 transitions, 5333 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-29 23:16:15,820 INFO L231 Difference]: Finished difference. Result has 147 places, 348 transitions, 4544 flow [2023-08-29 23:16:15,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4544, PETRI_PLACES=147, PETRI_TRANSITIONS=348} [2023-08-29 23:16:15,821 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 86 predicate places. [2023-08-29 23:16:15,821 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 348 transitions, 4544 flow [2023-08-29 23:16:15,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 246.66666666666666) internal successors, (1480), 6 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:15,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:16:15,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:16:15,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-29 23:16:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:16,022 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:16:16,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:16:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2138180742, now seen corresponding path program 1 times [2023-08-29 23:16:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:16:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229721180] [2023-08-29 23:16:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:16:16,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:16:16,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:16:16,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 23:16:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:16:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:16:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:16:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:16,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:16:16,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:16:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229721180] [2023-08-29 23:16:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229721180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:16:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:16:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:16:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001983273] [2023-08-29 23:16:16,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:16:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:16:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:16:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:16:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:16:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 607 [2023-08-29 23:16:16,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 348 transitions, 4544 flow. Second operand has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:16,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:16:16,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 607 [2023-08-29 23:16:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:16:24,867 INFO L130 PetriNetUnfolder]: 30696/51250 cut-off events. [2023-08-29 23:16:24,867 INFO L131 PetriNetUnfolder]: For 21750/23556 co-relation queries the response was YES. [2023-08-29 23:16:25,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147088 conditions, 51250 events. 30696/51250 cut-off events. For 21750/23556 co-relation queries the response was YES. Maximal size of possible extension queue 2796. Compared 472847 event pairs, 19293 based on Foata normal form. 1813/35302 useless extension candidates. Maximal degree in co-relation 147032. Up to 49646 conditions per place. [2023-08-29 23:16:25,266 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 304 selfloop transitions, 37 changer transitions 16/360 dead transitions. [2023-08-29 23:16:25,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 360 transitions, 5278 flow [2023-08-29 23:16:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:16:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:16:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1587 transitions. [2023-08-29 23:16:25,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357495881383855 [2023-08-29 23:16:25,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1587 transitions. [2023-08-29 23:16:25,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1587 transitions. [2023-08-29 23:16:25,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:16:25,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1587 transitions. [2023-08-29 23:16:25,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.5) internal successors, (1587), 6 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:25,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:25,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:25,277 INFO L175 Difference]: Start difference. First operand has 147 places, 348 transitions, 4544 flow. Second operand 6 states and 1587 transitions. [2023-08-29 23:16:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 360 transitions, 5278 flow [2023-08-29 23:16:26,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 360 transitions, 5208 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:16:26,538 INFO L231 Difference]: Finished difference. Result has 148 places, 331 transitions, 4425 flow [2023-08-29 23:16:26,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4425, PETRI_PLACES=148, PETRI_TRANSITIONS=331} [2023-08-29 23:16:26,539 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 87 predicate places. [2023-08-29 23:16:26,539 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 331 transitions, 4425 flow [2023-08-29 23:16:26,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:26,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:16:26,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:16:26,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:16:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:26,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:16:26,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:16:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 99151747, now seen corresponding path program 1 times [2023-08-29 23:16:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:16:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689344343] [2023-08-29 23:16:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:16:26,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:16:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:16:26,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:16:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:16:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:16:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:16:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:16:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:16:29,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:16:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:16:30,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:16:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689344343] [2023-08-29 23:16:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689344343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:16:30,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:16:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-29 23:16:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904857452] [2023-08-29 23:16:30,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:16:30,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:16:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:16:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:16:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:16:38,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 607 [2023-08-29 23:16:38,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 331 transitions, 4425 flow. Second operand has 13 states, 13 states have (on average 236.3846153846154) internal successors, (3073), 13 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:38,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:16:38,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 607 [2023-08-29 23:16:38,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:17:00,655 INFO L130 PetriNetUnfolder]: 30141/50797 cut-off events. [2023-08-29 23:17:00,656 INFO L131 PetriNetUnfolder]: For 21978/24031 co-relation queries the response was YES. [2023-08-29 23:17:00,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136520 conditions, 50797 events. 30141/50797 cut-off events. For 21978/24031 co-relation queries the response was YES. Maximal size of possible extension queue 2969. Compared 480253 event pairs, 18048 based on Foata normal form. 2063/34486 useless extension candidates. Maximal degree in co-relation 136464. Up to 23881 conditions per place. [2023-08-29 23:17:01,000 INFO L137 encePairwiseOnDemand]: 589/607 looper letters, 201 selfloop transitions, 308 changer transitions 0/513 dead transitions. [2023-08-29 23:17:01,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 513 transitions, 7301 flow [2023-08-29 23:17:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:17:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:17:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5311 transitions. [2023-08-29 23:17:01,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977085517447956 [2023-08-29 23:17:01,011 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5311 transitions. [2023-08-29 23:17:01,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5311 transitions. [2023-08-29 23:17:01,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:17:01,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5311 transitions. [2023-08-29 23:17:01,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 241.4090909090909) internal successors, (5311), 22 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:01,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 607.0) internal successors, (13961), 23 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:01,025 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 607.0) internal successors, (13961), 23 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:01,025 INFO L175 Difference]: Start difference. First operand has 148 places, 331 transitions, 4425 flow. Second operand 22 states and 5311 transitions. [2023-08-29 23:17:01,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 513 transitions, 7301 flow [2023-08-29 23:17:01,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 513 transitions, 7103 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-29 23:17:01,271 INFO L231 Difference]: Finished difference. Result has 163 places, 421 transitions, 6492 flow [2023-08-29 23:17:01,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6492, PETRI_PLACES=163, PETRI_TRANSITIONS=421} [2023-08-29 23:17:01,272 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 102 predicate places. [2023-08-29 23:17:01,272 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 421 transitions, 6492 flow [2023-08-29 23:17:01,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 236.3846153846154) internal successors, (3073), 13 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:01,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:17:01,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:17:01,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:17:01,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:01,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:17:01,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:17:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash -549916948, now seen corresponding path program 1 times [2023-08-29 23:17:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:17:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781120669] [2023-08-29 23:17:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:17:01,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:17:01,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:17:01,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:17:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:17:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:17:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:17:01,910 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:17:01,911 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 [2023-08-29 23:17:01,976 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:17:01,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:17:02,033 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:17:02,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2023-08-29 23:17:02,098 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:17:02,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-08-29 23:17:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:17:02,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:17:02,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:17:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781120669] [2023-08-29 23:17:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781120669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:17:02,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:17:02,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:17:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435073245] [2023-08-29 23:17:02,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:17:02,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:17:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:17:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:17:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:17:03,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 607 [2023-08-29 23:17:03,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 421 transitions, 6492 flow. Second operand has 6 states, 6 states have (on average 222.83333333333334) internal successors, (1337), 6 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:03,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:17:03,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 607 [2023-08-29 23:17:03,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:17:10,619 INFO L130 PetriNetUnfolder]: 29430/49007 cut-off events. [2023-08-29 23:17:10,619 INFO L131 PetriNetUnfolder]: For 16367/18551 co-relation queries the response was YES. [2023-08-29 23:17:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118981 conditions, 49007 events. 29430/49007 cut-off events. For 16367/18551 co-relation queries the response was YES. Maximal size of possible extension queue 2883. Compared 453311 event pairs, 18280 based on Foata normal form. 2184/31151 useless extension candidates. Maximal degree in co-relation 118924. Up to 48290 conditions per place. [2023-08-29 23:17:10,933 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 401 selfloop transitions, 12 changer transitions 0/416 dead transitions. [2023-08-29 23:17:10,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 416 transitions, 7286 flow [2023-08-29 23:17:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:17:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:17:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-29 23:17:10,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38220757825370677 [2023-08-29 23:17:10,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-29 23:17:10,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-29 23:17:10,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:17:10,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-29 23:17:10,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:10,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:10,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:10,941 INFO L175 Difference]: Start difference. First operand has 163 places, 421 transitions, 6492 flow. Second operand 4 states and 928 transitions. [2023-08-29 23:17:10,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 416 transitions, 7286 flow [2023-08-29 23:17:11,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 416 transitions, 7025 flow, removed 108 selfloop flow, removed 5 redundant places. [2023-08-29 23:17:11,018 INFO L231 Difference]: Finished difference. Result has 159 places, 416 transitions, 6223 flow [2023-08-29 23:17:11,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=6199, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6223, PETRI_PLACES=159, PETRI_TRANSITIONS=416} [2023-08-29 23:17:11,018 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 98 predicate places. [2023-08-29 23:17:11,018 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 416 transitions, 6223 flow [2023-08-29 23:17:11,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.83333333333334) internal successors, (1337), 6 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:11,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:17:11,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:17:11,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:17:11,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:11,219 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:17:11,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:17:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash -297804832, now seen corresponding path program 1 times [2023-08-29 23:17:11,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:17:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459613861] [2023-08-29 23:17:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:17:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:17:11,221 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:17:11,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:17:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:17:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:17:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:17:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:13,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:17:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:14,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:17:14,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459613861] [2023-08-29 23:17:14,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459613861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:17:14,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:17:14,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 23:17:14,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655640611] [2023-08-29 23:17:14,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:17:14,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:17:14,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:17:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:17:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:17:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 607 [2023-08-29 23:17:24,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 416 transitions, 6223 flow. Second operand has 16 states, 16 states have (on average 232.375) internal successors, (3718), 16 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:24,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:17:24,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 607 [2023-08-29 23:17:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:17:49,467 INFO L130 PetriNetUnfolder]: 41040/71500 cut-off events. [2023-08-29 23:17:49,467 INFO L131 PetriNetUnfolder]: For 24440/27304 co-relation queries the response was YES. [2023-08-29 23:17:49,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173926 conditions, 71500 events. 41040/71500 cut-off events. For 24440/27304 co-relation queries the response was YES. Maximal size of possible extension queue 4090. Compared 730322 event pairs, 20989 based on Foata normal form. 3036/47341 useless extension candidates. Maximal degree in co-relation 173870. Up to 32670 conditions per place. [2023-08-29 23:17:49,947 INFO L137 encePairwiseOnDemand]: 584/607 looper letters, 358 selfloop transitions, 329 changer transitions 39/730 dead transitions. [2023-08-29 23:17:49,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 730 transitions, 10533 flow [2023-08-29 23:17:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:17:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:17:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5778 transitions. [2023-08-29 23:17:49,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39662273476112025 [2023-08-29 23:17:49,960 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5778 transitions. [2023-08-29 23:17:49,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5778 transitions. [2023-08-29 23:17:49,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:17:49,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5778 transitions. [2023-08-29 23:17:49,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.75) internal successors, (5778), 24 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:49,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 607.0) internal successors, (15175), 25 states have internal predecessors, (15175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:49,974 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 607.0) internal successors, (15175), 25 states have internal predecessors, (15175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:49,975 INFO L175 Difference]: Start difference. First operand has 159 places, 416 transitions, 6223 flow. Second operand 24 states and 5778 transitions. [2023-08-29 23:17:49,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 730 transitions, 10533 flow [2023-08-29 23:17:50,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 730 transitions, 10520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:17:50,153 INFO L231 Difference]: Finished difference. Result has 189 places, 516 transitions, 8722 flow [2023-08-29 23:17:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8722, PETRI_PLACES=189, PETRI_TRANSITIONS=516} [2023-08-29 23:17:50,154 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 128 predicate places. [2023-08-29 23:17:50,154 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 516 transitions, 8722 flow [2023-08-29 23:17:50,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 232.375) internal successors, (3718), 16 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:50,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:17:50,155 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1] [2023-08-29 23:17:50,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:17:50,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:50,369 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:17:50,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:17:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash 375710371, now seen corresponding path program 1 times [2023-08-29 23:17:50,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:17:50,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731186707] [2023-08-29 23:17:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:17:50,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:17:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:17:50,371 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:17:50,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:17:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:17:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:17:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:17:50,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:17:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:51,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:17:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:53,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:17:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731186707] [2023-08-29 23:17:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731186707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:17:53,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:17:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-29 23:17:53,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074807793] [2023-08-29 23:17:53,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:17:53,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:17:53,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:17:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:17:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:18:28,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 607 [2023-08-29 23:18:28,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 516 transitions, 8722 flow. Second operand has 19 states, 19 states have (on average 234.26315789473685) internal successors, (4451), 19 states have internal predecessors, (4451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:28,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:18:28,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 607 [2023-08-29 23:18:28,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:18:35,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:37,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:38,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:40,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:42,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:44,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:46,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:49,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:54,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:56,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:18:58,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:19:00,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:19:02,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:19:04,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:19:06,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:19:42,393 INFO L130 PetriNetUnfolder]: 65024/111913 cut-off events. [2023-08-29 23:19:42,393 INFO L131 PetriNetUnfolder]: For 122904/126758 co-relation queries the response was YES. [2023-08-29 23:19:43,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326548 conditions, 111913 events. 65024/111913 cut-off events. For 122904/126758 co-relation queries the response was YES. Maximal size of possible extension queue 4607. Compared 1154764 event pairs, 41683 based on Foata normal form. 4158/82059 useless extension candidates. Maximal degree in co-relation 326483. Up to 25757 conditions per place. [2023-08-29 23:19:43,374 INFO L137 encePairwiseOnDemand]: 595/607 looper letters, 1327 selfloop transitions, 421 changer transitions 0/1752 dead transitions. [2023-08-29 23:19:43,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1752 transitions, 27397 flow [2023-08-29 23:19:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:19:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:19:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5487 transitions. [2023-08-29 23:19:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045422452341725 [2023-08-29 23:19:43,386 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5487 transitions. [2023-08-29 23:19:43,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5487 transitions. [2023-08-29 23:19:43,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:19:43,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5487 transitions. [2023-08-29 23:19:43,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 261.2857142857143) internal successors, (5487), 21 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:43,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:43,403 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:43,403 INFO L175 Difference]: Start difference. First operand has 189 places, 516 transitions, 8722 flow. Second operand 21 states and 5487 transitions. [2023-08-29 23:19:43,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1752 transitions, 27397 flow [2023-08-29 23:19:55,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1752 transitions, 25678 flow, removed 858 selfloop flow, removed 5 redundant places. [2023-08-29 23:19:55,755 INFO L231 Difference]: Finished difference. Result has 209 places, 676 transitions, 12805 flow [2023-08-29 23:19:55,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12805, PETRI_PLACES=209, PETRI_TRANSITIONS=676} [2023-08-29 23:19:55,756 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 148 predicate places. [2023-08-29 23:19:55,756 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 676 transitions, 12805 flow [2023-08-29 23:19:55,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 234.26315789473685) internal successors, (4451), 19 states have internal predecessors, (4451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:55,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:19:55,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:19:55,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:19:55,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:19:55,958 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:19:55,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:19:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -549917037, now seen corresponding path program 1 times [2023-08-29 23:19:55,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:19:55,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585655029] [2023-08-29 23:19:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:19:55,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:19:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:19:55,960 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:19:55,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 23:19:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:19:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:19:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:19:56,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:19:56,325 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:19:56,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2023-08-29 23:19:56,389 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 23:19:56,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-08-29 23:19:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:19:56,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:19:56,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:19:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585655029] [2023-08-29 23:19:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585655029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:19:56,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:19:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:19:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309710829] [2023-08-29 23:19:56,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:19:56,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:19:56,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:19:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:19:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:19:57,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 607 [2023-08-29 23:19:57,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 676 transitions, 12805 flow. Second operand has 6 states, 6 states have (on average 238.83333333333334) internal successors, (1433), 6 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:57,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:19:57,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 607 [2023-08-29 23:19:57,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:20:16,108 INFO L130 PetriNetUnfolder]: 56804/97678 cut-off events. [2023-08-29 23:20:16,108 INFO L131 PetriNetUnfolder]: For 70109/73805 co-relation queries the response was YES. [2023-08-29 23:20:16,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261381 conditions, 97678 events. 56804/97678 cut-off events. For 70109/73805 co-relation queries the response was YES. Maximal size of possible extension queue 3902. Compared 988593 event pairs, 37162 based on Foata normal form. 3696/74520 useless extension candidates. Maximal degree in co-relation 261310. Up to 96303 conditions per place. [2023-08-29 23:20:17,212 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 649 selfloop transitions, 22 changer transitions 0/674 dead transitions. [2023-08-29 23:20:17,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 674 transitions, 14141 flow [2023-08-29 23:20:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:20:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:20:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 990 transitions. [2023-08-29 23:20:17,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40774299835255357 [2023-08-29 23:20:17,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 990 transitions. [2023-08-29 23:20:17,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 990 transitions. [2023-08-29 23:20:17,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:20:17,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 990 transitions. [2023-08-29 23:20:17,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,222 INFO L175 Difference]: Start difference. First operand has 209 places, 676 transitions, 12805 flow. Second operand 4 states and 990 transitions. [2023-08-29 23:20:17,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 674 transitions, 14141 flow [2023-08-29 23:20:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 674 transitions, 13595 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-29 23:20:17,707 INFO L231 Difference]: Finished difference. Result has 202 places, 674 transitions, 12297 flow [2023-08-29 23:20:17,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=12253, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=12297, PETRI_PLACES=202, PETRI_TRANSITIONS=674} [2023-08-29 23:20:17,708 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 141 predicate places. [2023-08-29 23:20:17,708 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 674 transitions, 12297 flow [2023-08-29 23:20:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.83333333333334) internal successors, (1433), 6 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:20:17,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:20:17,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:20:17,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:20:17,909 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 23:20:17,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:20:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash -549917036, now seen corresponding path program 1 times [2023-08-29 23:20:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:20:17,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044539351] [2023-08-29 23:20:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:20:17,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:20:17,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:20:17,911 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:20:17,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 23:20:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:20:18,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 23:20:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:20:18,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:20:18,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-08-29 23:20:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:20:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:20:19,215 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:20:19,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:20:19,614 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-29 23:20:19,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2023-08-29 23:20:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:20:21,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:20:22,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 23:20:22,289 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 [2023-08-29 23:20:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:20:22,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:20:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044539351] [2023-08-29 23:20:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044539351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:20:22,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:20:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 23:20:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527560825] [2023-08-29 23:20:22,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:20:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:20:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:20:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:20:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:20:54,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 607 [2023-08-29 23:20:54,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 674 transitions, 12297 flow. Second operand has 14 states, 14 states have (on average 221.71428571428572) internal successors, (3104), 14 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:54,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:20:54,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 607 [2023-08-29 23:20:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:21:24,199 WARN L222 SmtUtils]: Spent 11.85s on a formula simplification. DAG size of input: 48 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:21:40,827 WARN L222 SmtUtils]: Spent 12.50s on a formula simplification. DAG size of input: 59 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:21:53,641 WARN L222 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:22:03,609 WARN L222 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:22:14,691 WARN L222 SmtUtils]: Spent 7.44s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:22:26,665 WARN L222 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:22:28,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:30,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:32,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:34,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:36,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:38,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:40,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:22:42,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:22:51,747 WARN L222 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:05,725 WARN L222 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 61 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:22,371 WARN L222 SmtUtils]: Spent 11.76s on a formula simplification. DAG size of input: 54 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:35,256 WARN L222 SmtUtils]: Spent 10.67s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:38,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:23:45,790 WARN L222 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:23:47,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] Killed by 15