./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:54:44,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:54:44,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:54:44,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:54:44,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:54:44,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:54:44,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:54:44,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:54:44,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:54:44,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:54:44,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:54:44,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:54:44,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:54:44,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:54:44,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:54:44,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:54:44,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:54:44,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:54:44,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:54:44,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:54:44,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:54:44,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:54:44,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:54:44,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:54:44,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:54:44,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:54:44,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:54:44,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:54:44,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:54:44,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:54:44,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:54:44,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:54:44,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:54:44,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:54:44,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:54:44,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:54:44,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:54:44,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:54:44,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:54:44,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:54:44,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:54:44,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:54:44,943 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:54:44,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:54:44,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:54:44,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:54:44,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:54:44,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:54:44,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:54:44,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:54:44,946 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:54:44,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:54:44,947 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:54:44,948 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:54:44,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:54:44,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:54:44,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:54:44,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:54:44,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:54:44,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:54:44,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:54:44,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:54:44,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:54:44,950 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:54:44,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:54:44,950 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:54:44,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:54:45,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:54:45,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:54:45,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:54:45,247 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:54:45,248 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:54:45,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 04:54:46,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:54:46,484 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:54:46,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 04:54:46,490 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55cd2832a/2fc82429e2154459aadcc8f321408345/FLAG2ce60b7dd [2023-08-30 04:54:46,507 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55cd2832a/2fc82429e2154459aadcc8f321408345 [2023-08-30 04:54:46,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:54:46,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:54:46,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:54:46,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:54:46,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:54:46,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:54:46" (1/1) ... [2023-08-30 04:54:46,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca6e4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:46, skipping insertion in model container [2023-08-30 04:54:46,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:54:46" (1/1) ... [2023-08-30 04:54:46,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:54:46,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:54:46,678 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 04:54:46,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:54:46,697 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:54:46,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56cdd9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:46, skipping insertion in model container [2023-08-30 04:54:46,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:54:46,698 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:54:46,700 INFO L158 Benchmark]: Toolchain (without parser) took 188.75ms. Allocated memory is still 88.1MB. Free memory was 68.0MB in the beginning and 57.9MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:54:46,700 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:54:46,701 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.81ms. Allocated memory is still 88.1MB. Free memory was 67.9MB in the beginning and 57.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:54:46,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.81ms. Allocated memory is still 88.1MB. Free memory was 67.9MB in the beginning and 57.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 117]: 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/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:54:48,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:54:48,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:54:48,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:54:48,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:54:48,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:54:48,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:54:48,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:54:48,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:54:48,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:54:48,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:54:48,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:54:48,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:54:48,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:54:48,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:54:48,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:54:48,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:54:48,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:54:48,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:54:48,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:54:48,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:54:48,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:54:48,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:54:48,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:54:48,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:54:48,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:54:48,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:54:48,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:54:48,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:54:48,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:54:48,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:54:48,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:54:48,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:54:48,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:54:48,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:54:48,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:54:48,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:54:48,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:54:48,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:54:48,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:54:48,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:54:48,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:54:48,255 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:54:48,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:54:48,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:54:48,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:54:48,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:54:48,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:54:48,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:54:48,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:54:48,257 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:54:48,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:54:48,258 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:54:48,258 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:54:48,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:54:48,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:54:48,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:54:48,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:54:48,260 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:54:48,260 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:54:48,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:54:48,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:54:48,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:54:48,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:54:48,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:54:48,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:54:48,261 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:54:48,262 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:54:48,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:54:48,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:54:48,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:54:48,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:54:48,517 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:54:48,517 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:54:48,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 04:54:49,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:54:49,713 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:54:49,714 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 04:54:49,718 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b9c1bc0/d15bcee0ba8d469b8ea07334f1616873/FLAG41f714981 [2023-08-30 04:54:49,729 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b9c1bc0/d15bcee0ba8d469b8ea07334f1616873 [2023-08-30 04:54:49,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:54:49,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:54:49,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:54:49,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:54:49,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:54:49,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:49,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772e4685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49, skipping insertion in model container [2023-08-30 04:54:49,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:49,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:54:49,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:54:49,852 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 04:54:49,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:54:49,878 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:54:49,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:54:49,898 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 04:54:49,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:54:49,917 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:54:49,943 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 04:54:49,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:54:49,966 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:54:49,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49 WrapperNode [2023-08-30 04:54:49,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:54:49,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:54:49,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:54:49,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:54:49,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:49,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,024 INFO L138 Inliner]: procedures = 28, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 274 [2023-08-30 04:54:50,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:54:50,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:54:50,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:54:50,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:54:50,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,066 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:54:50,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:54:50,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:54:50,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:54:50,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (1/1) ... [2023-08-30 04:54:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:54:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:54:50,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:54:50,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:54:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:54:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:54:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:54:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:54:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:54:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:54:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:54:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:54:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 04:54:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 04:54:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:54:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:54:50,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:54:50,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:54:50,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:54:50,133 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:54:50,249 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:54:50,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:54:50,788 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:54:50,795 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:54:50,795 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 04:54:50,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:54:50 BoogieIcfgContainer [2023-08-30 04:54:50,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:54:50,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:54:50,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:54:50,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:54:50,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:54:49" (1/3) ... [2023-08-30 04:54:50,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126e2d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:54:50, skipping insertion in model container [2023-08-30 04:54:50,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:54:49" (2/3) ... [2023-08-30 04:54:50,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126e2d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:54:50, skipping insertion in model container [2023-08-30 04:54:50,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:54:50" (3/3) ... [2023-08-30 04:54:50,801 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-08-30 04:54:50,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:54:50,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-30 04:54:50,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:54:50,917 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:54:50,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 355 transitions, 734 flow [2023-08-30 04:54:51,082 INFO L130 PetriNetUnfolder]: 28/352 cut-off events. [2023-08-30 04:54:51,082 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:54:51,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 352 events. 28/352 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 772 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-30 04:54:51,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 355 transitions, 734 flow [2023-08-30 04:54:51,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 348 transitions, 714 flow [2023-08-30 04:54:51,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:54:51,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 348 transitions, 714 flow [2023-08-30 04:54:51,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 348 transitions, 714 flow [2023-08-30 04:54:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 348 transitions, 714 flow [2023-08-30 04:54:51,172 INFO L130 PetriNetUnfolder]: 28/348 cut-off events. [2023-08-30 04:54:51,172 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:54:51,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 348 events. 28/348 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 770 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 266. Up to 3 conditions per place. [2023-08-30 04:54:51,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 21114 [2023-08-30 04:55:20,198 INFO L134 LiptonReduction]: Checked pairs total: 32594 [2023-08-30 04:55:20,198 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-30 04:55:20,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:55:20,211 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;@5b7e619d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:55:20,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-30 04:55:20,213 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:55:20,213 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:55:20,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:20,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:55:20,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:55:20,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 45647, now seen corresponding path program 1 times [2023-08-30 04:55:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18290833] [2023-08-30 04:55:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:20,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:20,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:20,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:55:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:55:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:20,400 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:55:20,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:55:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:20,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:20,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18290833] [2023-08-30 04:55:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18290833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:20,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:20,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:55:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025197875] [2023-08-30 04:55:20,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:55:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:55:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:55:20,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-08-30 04:55:20,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:20,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:20,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-08-30 04:55:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:22,855 INFO L130 PetriNetUnfolder]: 17182/23633 cut-off events. [2023-08-30 04:55:22,856 INFO L131 PetriNetUnfolder]: For 452/452 co-relation queries the response was YES. [2023-08-30 04:55:22,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 23633 events. 17182/23633 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 133802 event pairs, 14603 based on Foata normal form. 0/7805 useless extension candidates. Maximal degree in co-relation 45108. Up to 23465 conditions per place. [2023-08-30 04:55:22,962 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 69 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 04:55:22,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 300 flow [2023-08-30 04:55:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:55:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:55:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-30 04:55:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-30 04:55:22,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-30 04:55:22,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-30 04:55:22,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:22,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-30 04:55:22,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:22,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:22,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:22,988 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1020 transitions. [2023-08-30 04:55:22,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 300 flow [2023-08-30 04:55:22,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 04:55:22,994 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 150 flow [2023-08-30 04:55:22,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-30 04:55:22,997 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-08-30 04:55:22,997 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 150 flow [2023-08-30 04:55:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:22,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:22,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:55:23,008 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 (2)] Ended with exit code 0 [2023-08-30 04:55:23,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:23,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:55:23,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash 45648, now seen corresponding path program 1 times [2023-08-30 04:55:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:23,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820407381] [2023-08-30 04:55:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:23,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:23,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:23,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 04:55:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:55:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:23,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:55:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 04:55:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:23,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:23,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820407381] [2023-08-30 04:55:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820407381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:23,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:23,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:55:23,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804444227] [2023-08-30 04:55:23,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:23,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:55:23,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:55:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:55:23,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 770 [2023-08-30 04:55:23,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:23,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:23,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 770 [2023-08-30 04:55:23,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:28,009 INFO L130 PetriNetUnfolder]: 34363/47262 cut-off events. [2023-08-30 04:55:28,010 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 04:55:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94586 conditions, 47262 events. 34363/47262 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 2801. Compared 291677 event pairs, 29206 based on Foata normal form. 0/15889 useless extension candidates. Maximal degree in co-relation 94580. Up to 23466 conditions per place. [2023-08-30 04:55:28,245 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 130 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-08-30 04:55:28,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 560 flow [2023-08-30 04:55:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:55:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:55:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-08-30 04:55:28,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467965367965368 [2023-08-30 04:55:28,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-08-30 04:55:28,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-08-30 04:55:28,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:28,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-08-30 04:55:28,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:28,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:28,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:28,256 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 150 flow. Second operand 3 states and 1081 transitions. [2023-08-30 04:55:28,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 560 flow [2023-08-30 04:55:28,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:55:28,259 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 199 flow [2023-08-30 04:55:28,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-30 04:55:28,260 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2023-08-30 04:55:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 199 flow [2023-08-30 04:55:28,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:28,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:28,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:55:28,283 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 (3)] Ended with exit code 0 [2023-08-30 04:55:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:28,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:55:28,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1419537, now seen corresponding path program 1 times [2023-08-30 04:55:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052960360] [2023-08-30 04:55:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:28,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:28,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:28,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:55:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:55:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:28,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:55:28,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 04:55:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:55:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:28,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:28,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052960360] [2023-08-30 04:55:28,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052960360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:55:28,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:55:28,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:55:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932480876] [2023-08-30 04:55:28,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:55:28,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:55:28,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:55:28,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:55:29,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 770 [2023-08-30 04:55:29,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:29,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:29,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 770 [2023-08-30 04:55:29,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:38,267 INFO L130 PetriNetUnfolder]: 51554/70907 cut-off events. [2023-08-30 04:55:38,267 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2023-08-30 04:55:38,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141947 conditions, 70907 events. 51554/70907 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 3744. Compared 456867 event pairs, 43809 based on Foata normal form. 0/23994 useless extension candidates. Maximal degree in co-relation 141938. Up to 23467 conditions per place. [2023-08-30 04:55:38,673 INFO L137 encePairwiseOnDemand]: 758/770 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2023-08-30 04:55:38,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 219 transitions, 975 flow [2023-08-30 04:55:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:55:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:55:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2021 transitions. [2023-08-30 04:55:38,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43744588744588747 [2023-08-30 04:55:38,682 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2021 transitions. [2023-08-30 04:55:38,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2021 transitions. [2023-08-30 04:55:38,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:38,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2021 transitions. [2023-08-30 04:55:38,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 336.8333333333333) internal successors, (2021), 6 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:38,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:38,699 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:38,699 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 199 flow. Second operand 6 states and 2021 transitions. [2023-08-30 04:55:38,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 219 transitions, 975 flow [2023-08-30 04:55:38,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:55:38,707 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2023-08-30 04:55:38,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2023-08-30 04:55:38,712 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2023-08-30 04:55:38,712 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2023-08-30 04:55:38,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:38,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:38,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:55:38,722 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 (4)] Ended with exit code 0 [2023-08-30 04:55:38,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:38,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:55:38,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 44050835, now seen corresponding path program 1 times [2023-08-30 04:55:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:38,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700622284] [2023-08-30 04:55:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:38,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:38,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:55:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:55:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:55:39,148 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 04:55:39,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 04:55:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:55:39,368 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 04:55:39,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 04:55:39,609 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 04:55:39,610 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 04:55:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:41,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:41,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700622284] [2023-08-30 04:55:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700622284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:41,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:55:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739549976] [2023-08-30 04:55:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:55:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:55:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 04:55:44,013 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] [2023-08-30 04:55:46,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:48,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:51,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:53,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:55,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:57,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:55:59,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:01,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:04,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:05,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:08,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:10,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:56:10,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 770 [2023-08-30 04:56:10,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:10,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:10,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 770 [2023-08-30 04:56:10,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:15,212 INFO L130 PetriNetUnfolder]: 42450/58608 cut-off events. [2023-08-30 04:56:15,213 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2023-08-30 04:56:15,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117957 conditions, 58608 events. 42450/58608 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 371371 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 117944. Up to 58608 conditions per place. [2023-08-30 04:56:15,439 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 92 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-08-30 04:56:15,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 557 flow [2023-08-30 04:56:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:56:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:56:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-08-30 04:56:15,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2023-08-30 04:56:15,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-08-30 04:56:15,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-08-30 04:56:15,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:15,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-08-30 04:56:15,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:15,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:15,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:15,448 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 869 transitions. [2023-08-30 04:56:15,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 557 flow [2023-08-30 04:56:15,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 527 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 04:56:15,453 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2023-08-30 04:56:15,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-30 04:56:15,456 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-08-30 04:56:15,456 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2023-08-30 04:56:15,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:15,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:15,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:56:15,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:15,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:15,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:56:15,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 44050836, now seen corresponding path program 1 times [2023-08-30 04:56:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024462391] [2023-08-30 04:56:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:15,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:15,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:15,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:56:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:56:15,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:15,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,852 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 04:56:15,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 04:56:15,865 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:56:15,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 04:56:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,895 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 [2023-08-30 04:56:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:15,917 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 [2023-08-30 04:56:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:56:15,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:15,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024462391] [2023-08-30 04:56:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024462391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:56:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854178221] [2023-08-30 04:56:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:56:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:56:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:56:16,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-30 04:56:16,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:16,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:16,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-30 04:56:16,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:19,510 INFO L130 PetriNetUnfolder]: 27484/39019 cut-off events. [2023-08-30 04:56:19,510 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-30 04:56:19,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78375 conditions, 39019 events. 27484/39019 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 249941 event pairs, 23103 based on Foata normal form. 0/15833 useless extension candidates. Maximal degree in co-relation 78361. Up to 38683 conditions per place. [2023-08-30 04:56:19,633 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-30 04:56:19,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 499 flow [2023-08-30 04:56:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:56:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:56:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 04:56:19,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44632034632034634 [2023-08-30 04:56:19,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 04:56:19,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 04:56:19,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:19,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 04:56:19,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 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) [2023-08-30 04:56:19,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:19,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:19,643 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 1031 transitions. [2023-08-30 04:56:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 499 flow [2023-08-30 04:56:19,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:56:19,647 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2023-08-30 04:56:19,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2023-08-30 04:56:19,649 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-08-30 04:56:19,649 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2023-08-30 04:56:19,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:19,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:19,650 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:56:19,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:19,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:56:19,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash -655828336, now seen corresponding path program 2 times [2023-08-30 04:56:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850799322] [2023-08-30 04:56:19,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:56:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:19,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:19,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:19,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:56:19,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:56:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:56:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:20,020 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:56:20,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 04:56:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:56:20,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:56:20,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:20,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850799322] [2023-08-30 04:56:20,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850799322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:20,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:20,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:56:20,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017491705] [2023-08-30 04:56:20,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:56:20,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:56:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:56:26,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 770 [2023-08-30 04:56:26,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:26,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 770 [2023-08-30 04:56:26,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:30,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:32,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:33,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:35,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:37,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:39,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:41,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:43,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:44,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:46,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:48,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:57:02,078 INFO L130 PetriNetUnfolder]: 82436/117022 cut-off events. [2023-08-30 04:57:02,078 INFO L131 PetriNetUnfolder]: For 807/807 co-relation queries the response was YES. [2023-08-30 04:57:02,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234960 conditions, 117022 events. 82436/117022 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 4105. Compared 822992 event pairs, 69309 based on Foata normal form. 15/48592 useless extension candidates. Maximal degree in co-relation 234945. Up to 12906 conditions per place. [2023-08-30 04:57:02,667 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 521 selfloop transitions, 50 changer transitions 0/572 dead transitions. [2023-08-30 04:57:02,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 572 transitions, 2624 flow [2023-08-30 04:57:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 04:57:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 04:57:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4512 transitions. [2023-08-30 04:57:02,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45074925074925076 [2023-08-30 04:57:02,678 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4512 transitions. [2023-08-30 04:57:02,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4512 transitions. [2023-08-30 04:57:02,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:02,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4512 transitions. [2023-08-30 04:57:02,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 347.0769230769231) internal successors, (4512), 13 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 770.0) internal successors, (10780), 14 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:02,701 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 770.0) internal successors, (10780), 14 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:02,701 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 13 states and 4512 transitions. [2023-08-30 04:57:02,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 572 transitions, 2624 flow [2023-08-30 04:57:02,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 572 transitions, 2623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:57:02,707 INFO L231 Difference]: Finished difference. Result has 96 places, 118 transitions, 690 flow [2023-08-30 04:57:02,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=690, PETRI_PLACES=96, PETRI_TRANSITIONS=118} [2023-08-30 04:57:02,708 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-08-30 04:57:02,708 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 118 transitions, 690 flow [2023-08-30 04:57:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 303.0) internal successors, (3636), 12 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:02,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:02,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:57:02,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:02,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:02,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:57:02,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -616786858, now seen corresponding path program 1 times [2023-08-30 04:57:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023877565] [2023-08-30 04:57:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:02,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:02,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:57:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:57:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:03,078 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 04:57:03,078 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 04:57:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:03,148 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 [2023-08-30 04:57:03,183 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:57:03,183 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 [2023-08-30 04:57:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:03,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:03,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023877565] [2023-08-30 04:57:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023877565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:57:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65605706] [2023-08-30 04:57:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:57:03,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:57:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:57:03,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-30 04:57:03,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 690 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:03,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:03,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-30 04:57:03,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:14,319 INFO L130 PetriNetUnfolder]: 80600/114241 cut-off events. [2023-08-30 04:57:14,324 INFO L131 PetriNetUnfolder]: For 848/848 co-relation queries the response was YES. [2023-08-30 04:57:14,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229517 conditions, 114241 events. 80600/114241 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 3597. Compared 796827 event pairs, 67734 based on Foata normal form. 0/46874 useless extension candidates. Maximal degree in co-relation 229493. Up to 113233 conditions per place. [2023-08-30 04:57:14,970 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 114 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2023-08-30 04:57:14,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 116 transitions, 916 flow [2023-08-30 04:57:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:57:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:57:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1029 transitions. [2023-08-30 04:57:14,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2023-08-30 04:57:14,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1029 transitions. [2023-08-30 04:57:14,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1029 transitions. [2023-08-30 04:57:14,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:14,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1029 transitions. [2023-08-30 04:57:14,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:15,000 INFO L175 Difference]: Start difference. First operand has 96 places, 118 transitions, 690 flow. Second operand 3 states and 1029 transitions. [2023-08-30 04:57:15,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 116 transitions, 916 flow [2023-08-30 04:57:15,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 116 transitions, 823 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 04:57:15,003 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 595 flow [2023-08-30 04:57:15,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=595, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2023-08-30 04:57:15,017 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 11 predicate places. [2023-08-30 04:57:15,017 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 595 flow [2023-08-30 04:57:15,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:15,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:15,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:57:15,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:15,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:57:15,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash -616786859, now seen corresponding path program 1 times [2023-08-30 04:57:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625648300] [2023-08-30 04:57:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:15,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:15,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:15,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:15,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 04:57:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:57:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:15,420 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 04:57:15,420 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 04:57:15,431 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 39 treesize of output 37 [2023-08-30 04:57:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:15,471 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 [2023-08-30 04:57:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:15,488 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 [2023-08-30 04:57:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:15,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:15,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:15,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625648300] [2023-08-30 04:57:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625648300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:15,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:15,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:57:15,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741126725] [2023-08-30 04:57:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:15,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:57:15,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:57:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:57:15,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 770 [2023-08-30 04:57:15,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 595 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:15,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:15,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 770 [2023-08-30 04:57:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:27,355 INFO L130 PetriNetUnfolder]: 78764/111460 cut-off events. [2023-08-30 04:57:27,355 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-08-30 04:57:27,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223900 conditions, 111460 events. 78764/111460 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 3702. Compared 774593 event pairs, 66159 based on Foata normal form. 0/46282 useless extension candidates. Maximal degree in co-relation 223875. Up to 110452 conditions per place. [2023-08-30 04:57:28,198 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 112 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-08-30 04:57:28,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 817 flow [2023-08-30 04:57:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:57:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:57:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-30 04:57:28,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445887445887446 [2023-08-30 04:57:28,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-30 04:57:28,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-30 04:57:28,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:28,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-30 04:57:28,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:28,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:28,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:28,205 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 595 flow. Second operand 3 states and 1027 transitions. [2023-08-30 04:57:28,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 817 flow [2023-08-30 04:57:28,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 114 transitions, 816 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:57:28,208 INFO L231 Difference]: Finished difference. Result has 91 places, 114 transitions, 592 flow [2023-08-30 04:57:28,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=91, PETRI_TRANSITIONS=114} [2023-08-30 04:57:28,209 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2023-08-30 04:57:28,209 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 114 transitions, 592 flow [2023-08-30 04:57:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:28,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:28,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:28,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:28,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:28,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:57:28,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1940525924, now seen corresponding path program 1 times [2023-08-30 04:57:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:28,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333784408] [2023-08-30 04:57:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:28,441 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:28,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:57:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:57:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:57:28,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:28,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:28,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333784408] [2023-08-30 04:57:28,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333784408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:28,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:28,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:57:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631457170] [2023-08-30 04:57:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:57:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:57:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:57:28,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-08-30 04:57:28,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 114 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:28,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:28,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-08-30 04:57:28,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:42,025 INFO L130 PetriNetUnfolder]: 95947/137027 cut-off events. [2023-08-30 04:57:42,025 INFO L131 PetriNetUnfolder]: For 970/970 co-relation queries the response was YES. [2023-08-30 04:57:42,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275477 conditions, 137027 events. 95947/137027 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 4538. Compared 1001244 event pairs, 68697 based on Foata normal form. 0/61823 useless extension candidates. Maximal degree in co-relation 275451. Up to 110451 conditions per place. [2023-08-30 04:57:42,914 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 213 selfloop transitions, 4 changer transitions 0/218 dead transitions. [2023-08-30 04:57:42,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 218 transitions, 1458 flow [2023-08-30 04:57:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:57:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:57:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1702 transitions. [2023-08-30 04:57:42,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44207792207792207 [2023-08-30 04:57:42,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1702 transitions. [2023-08-30 04:57:42,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1702 transitions. [2023-08-30 04:57:42,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:42,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1702 transitions. [2023-08-30 04:57:42,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:42,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:42,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:42,925 INFO L175 Difference]: Start difference. First operand has 91 places, 114 transitions, 592 flow. Second operand 5 states and 1702 transitions. [2023-08-30 04:57:42,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 218 transitions, 1458 flow [2023-08-30 04:57:42,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 218 transitions, 1457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:57:42,930 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 616 flow [2023-08-30 04:57:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=616, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2023-08-30 04:57:42,931 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-08-30 04:57:42,931 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 616 flow [2023-08-30 04:57:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:42,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:43,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:57:43,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1975384452, now seen corresponding path program 1 times [2023-08-30 04:57:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820336376] [2023-08-30 04:57:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:43,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:43,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:43,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:43,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:57:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:57:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:57:43,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:43,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:43,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820336376] [2023-08-30 04:57:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820336376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:43,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:57:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242444609] [2023-08-30 04:57:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:57:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:57:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:57:43,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 770 [2023-08-30 04:57:43,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 616 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:43,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:43,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 770 [2023-08-30 04:57:43,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:01,787 INFO L130 PetriNetUnfolder]: 130293/188047 cut-off events. [2023-08-30 04:58:01,787 INFO L131 PetriNetUnfolder]: For 20874/20874 co-relation queries the response was YES. [2023-08-30 04:58:02,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401722 conditions, 188047 events. 130293/188047 cut-off events. For 20874/20874 co-relation queries the response was YES. Maximal size of possible extension queue 6034. Compared 1459215 event pairs, 86211 based on Foata normal form. 2124/94609 useless extension candidates. Maximal degree in co-relation 401693. Up to 135935 conditions per place. [2023-08-30 04:58:03,076 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 183 selfloop transitions, 15 changer transitions 0/199 dead transitions. [2023-08-30 04:58:03,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 199 transitions, 1290 flow [2023-08-30 04:58:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:58:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:58:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1699 transitions. [2023-08-30 04:58:03,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412987012987013 [2023-08-30 04:58:03,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1699 transitions. [2023-08-30 04:58:03,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1699 transitions. [2023-08-30 04:58:03,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:03,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1699 transitions. [2023-08-30 04:58:03,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.8) internal successors, (1699), 5 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,111 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 616 flow. Second operand 5 states and 1699 transitions. [2023-08-30 04:58:03,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 199 transitions, 1290 flow [2023-08-30 04:58:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 199 transitions, 1284 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:03,242 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 669 flow [2023-08-30 04:58:03,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=669, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2023-08-30 04:58:03,243 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 20 predicate places. [2023-08-30 04:58:03,243 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 669 flow [2023-08-30 04:58:03,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:03,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:03,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:03,451 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:58:03,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -26653916, now seen corresponding path program 1 times [2023-08-30 04:58:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728812877] [2023-08-30 04:58:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:03,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:03,453 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:03,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:58:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:58:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,631 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:58:03,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 04:58:03,637 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 18 treesize of output 16 [2023-08-30 04:58:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,687 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 [2023-08-30 04:58:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:03,713 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 [2023-08-30 04:58:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:03,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:03,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:03,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728812877] [2023-08-30 04:58:03,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728812877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:03,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:58:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385279046] [2023-08-30 04:58:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:58:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:58:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:58:04,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 770 [2023-08-30 04:58:04,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 669 flow. Second operand has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:04,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 770 [2023-08-30 04:58:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:21,119 INFO L130 PetriNetUnfolder]: 124686/179605 cut-off events. [2023-08-30 04:58:21,119 INFO L131 PetriNetUnfolder]: For 59383/59383 co-relation queries the response was YES. [2023-08-30 04:58:21,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405534 conditions, 179605 events. 124686/179605 cut-off events. For 59383/59383 co-relation queries the response was YES. Maximal size of possible extension queue 5890. Compared 1367869 event pairs, 106164 based on Foata normal form. 0/88273 useless extension candidates. Maximal degree in co-relation 405503. Up to 178345 conditions per place. [2023-08-30 04:58:22,536 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 113 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-30 04:58:22,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 115 transitions, 893 flow [2023-08-30 04:58:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-30 04:58:22,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44112554112554114 [2023-08-30 04:58:22,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-30 04:58:22,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-30 04:58:22,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:22,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-30 04:58:22,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,542 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 669 flow. Second operand 3 states and 1019 transitions. [2023-08-30 04:58:22,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 115 transitions, 893 flow [2023-08-30 04:58:22,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 115 transitions, 877 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:22,733 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 651 flow [2023-08-30 04:58:22,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2023-08-30 04:58:22,734 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2023-08-30 04:58:22,735 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 651 flow [2023-08-30 04:58:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:22,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:22,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:22,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:22,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-30 04:58:22,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -26653915, now seen corresponding path program 1 times [2023-08-30 04:58:22,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:22,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423501695] [2023-08-30 04:58:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:22,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:22,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:58:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:58:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:23,099 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 04:58:23,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 04:58:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:23,132 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 [2023-08-30 04:58:23,158 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:58:23,158 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 [2023-08-30 04:58:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:23,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:23,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423501695] [2023-08-30 04:58:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423501695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:23,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:58:23,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657077754] [2023-08-30 04:58:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:58:23,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:58:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:58:23,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 770 [2023-08-30 04:58:23,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 651 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:23,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:23,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 770 [2023-08-30 04:58:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand