./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-symm.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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:52:07,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:52:07,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:52:07,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:52:07,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:52:07,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:52:07,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:52:07,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:52:07,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:52:07,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:52:07,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:52:07,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:52:07,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:52:07,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:52:07,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:52:07,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:52:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:52:07,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:52:07,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:52:07,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:52:07,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:52:07,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:52:07,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:52:07,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:52:07,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:52:07,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:52:07,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:52:07,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:52:07,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:52:07,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:52:07,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:52:07,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:52:07,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:52:07,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:52:07,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:52:07,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:52:07,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:52:07,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:52:07,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:52:07,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:52:07,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:52:07,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:52:07,324 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:52:07,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:52:07,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:52:07,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:52:07,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:52:07,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:52:07,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:52:07,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:52:07,327 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:52:07,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:52:07,328 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:52:07,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:52:07,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:52:07,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:52:07,329 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:52:07,330 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:52:07,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:52:07,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:52:07,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:52:07,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:07,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:52:07,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:52:07,332 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:52:07,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:52:07,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:52:07,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:52:07,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:52:07,621 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:52:07,622 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:52:07,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-29 22:52:08,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:52:08,762 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:52:08,763 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-29 22:52:08,767 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442069f8a/b23627a5005544c48869edea922f3d6d/FLAG7a046b3d8 [2023-08-29 22:52:08,777 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442069f8a/b23627a5005544c48869edea922f3d6d [2023-08-29 22:52:08,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:52:08,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:52:08,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:08,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:52:08,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:52:08,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:08" (1/1) ... [2023-08-29 22:52:08,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520c9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:08, skipping insertion in model container [2023-08-29 22:52:08,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:08" (1/1) ... [2023-08-29 22:52:08,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:52:08,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:08,911 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-node-symm.wvr.c[3305,3318] [2023-08-29 22:52:08,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:08,949 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:52:08,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5188e8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:08, skipping insertion in model container [2023-08-29 22:52:08,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:08,950 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:52:08,951 INFO L158 Benchmark]: Toolchain (without parser) took 168.27ms. Allocated memory is still 73.4MB. Free memory was 51.2MB in the beginning and 40.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:52:08,952 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:52:08,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.74ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 40.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:52:08,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.74ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 40.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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-node-symm.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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:52:10,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:52:10,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:52:10,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:52:10,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:52:10,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:52:10,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:52:10,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:52:10,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:52:10,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:52:10,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:52:10,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:52:10,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:52:10,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:52:10,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:52:10,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:52:10,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:52:10,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:52:10,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:52:10,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:52:10,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:52:10,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:52:10,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:52:10,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:52:10,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:52:10,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:52:10,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:52:10,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:52:10,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:52:10,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:52:10,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:52:10,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:52:10,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:52:10,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:52:10,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:52:10,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:52:10,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:52:10,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:52:10,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:52:10,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:52:10,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:52:10,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:52:10,548 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:52:10,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:52:10,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:52:10,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:52:10,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:52:10,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:52:10,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:52:10,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:52:10,551 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:52:10,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:52:10,551 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:52:10,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:52:10,553 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:52:10,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:52:10,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:52:10,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:52:10,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:10,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:52:10,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:52:10,554 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:52:10,555 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:52:10,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:52:10,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:52:10,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:52:10,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:52:10,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:52:10,818 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:52:10,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-29 22:52:11,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:52:11,966 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:52:11,966 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-29 22:52:11,987 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9397c46/2e9d104992a847c386b4238800cfbb71/FLAG7e481e65f [2023-08-29 22:52:12,003 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9397c46/2e9d104992a847c386b4238800cfbb71 [2023-08-29 22:52:12,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:52:12,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:52:12,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:12,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:52:12,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:52:12,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547bb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12, skipping insertion in model container [2023-08-29 22:52:12,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:52:12,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:12,178 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-node-symm.wvr.c[3305,3318] [2023-08-29 22:52:12,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:12,205 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:52:12,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:12,232 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-node-symm.wvr.c[3305,3318] [2023-08-29 22:52:12,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:12,245 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:52:12,269 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-node-symm.wvr.c[3305,3318] [2023-08-29 22:52:12,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:12,290 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:52:12,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12 WrapperNode [2023-08-29 22:52:12,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:12,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:52:12,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:52:12,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:52:12,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,365 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 282 [2023-08-29 22:52:12,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:52:12,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:52:12,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:52:12,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:52:12,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,393 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:52:12,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:52:12,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:52:12,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:52:12,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (1/1) ... [2023-08-29 22:52:12,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:52:12,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:52:12,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:52:12,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:52:12,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-29 22:52:12,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:52:12,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:52:12,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:52:12,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:52:12,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:52:12,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:52:12,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:52:12,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:52:12,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:52:12,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:52:12,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-29 22:52:12,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:52:12,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:52:12,442 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:52:12,523 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:52:12,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:52:13,091 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:52:13,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:52:13,100 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:52:13,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:52:13 BoogieIcfgContainer [2023-08-29 22:52:13,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:52:13,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:52:13,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:52:13,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:52:13,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:52:12" (1/3) ... [2023-08-29 22:52:13,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629b8bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:52:13, skipping insertion in model container [2023-08-29 22:52:13,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:12" (2/3) ... [2023-08-29 22:52:13,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629b8bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:52:13, skipping insertion in model container [2023-08-29 22:52:13,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:52:13" (3/3) ... [2023-08-29 22:52:13,110 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-08-29 22:52:13,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:52:13,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-29 22:52:13,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:52:13,211 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:52:13,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 375 transitions, 766 flow [2023-08-29 22:52:13,366 INFO L130 PetriNetUnfolder]: 28/373 cut-off events. [2023-08-29 22:52:13,366 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:52:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 373 events. 28/373 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-08-29 22:52:13,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 375 transitions, 766 flow [2023-08-29 22:52:13,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 369 transitions, 750 flow [2023-08-29 22:52:13,384 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:52:13,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 369 transitions, 750 flow [2023-08-29 22:52:13,396 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 369 transitions, 750 flow [2023-08-29 22:52:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 369 transitions, 750 flow [2023-08-29 22:52:13,442 INFO L130 PetriNetUnfolder]: 28/369 cut-off events. [2023-08-29 22:52:13,442 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:52:13,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 369 events. 28/369 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 546 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-08-29 22:52:13,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 9676 [2023-08-29 22:52:48,930 INFO L134 LiptonReduction]: Checked pairs total: 14522 [2023-08-29 22:52:48,930 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-08-29 22:52:48,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:52:48,948 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;@7d2085b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:52:48,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2023-08-29 22:52:48,953 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:52:48,953 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:52:48,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:48,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:52:48,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:48,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 46781, now seen corresponding path program 1 times [2023-08-29 22:52:48,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:48,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967776510] [2023-08-29 22:52:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:48,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:48,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:48,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:52:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:49,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:52:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:49,180 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:52:49,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:52:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:49,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:52:49,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:49,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967776510] [2023-08-29 22:52:49,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967776510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:52:49,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:52:49,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:52:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620152153] [2023-08-29 22:52:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:52:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:52:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:52:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:52:49,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 822 [2023-08-29 22:52:49,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:49,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:49,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 822 [2023-08-29 22:52:49,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:49,992 INFO L130 PetriNetUnfolder]: 1023/1704 cut-off events. [2023-08-29 22:52:49,992 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 22:52:49,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3441 conditions, 1704 events. 1023/1704 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8707 event pairs, 945 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 3250. Up to 1684 conditions per place. [2023-08-29 22:52:49,999 INFO L137 encePairwiseOnDemand]: 810/822 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 22:52:49,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 276 flow [2023-08-29 22:52:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:52:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:52:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2023-08-29 22:52:50,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399837793998378 [2023-08-29 22:52:50,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2023-08-29 22:52:50,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2023-08-29 22:52:50,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:50,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2023-08-29 22:52:50,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,045 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 3 states and 1085 transitions. [2023-08-29 22:52:50,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 276 flow [2023-08-29 22:52:50,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:52:50,051 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 168 flow [2023-08-29 22:52:50,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-08-29 22:52:50,056 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-29 22:52:50,056 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 168 flow [2023-08-29 22:52:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:50,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:52:50,081 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 [2023-08-29 22:52:50,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:50,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:50,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash 46782, now seen corresponding path program 1 times [2023-08-29 22:52:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:50,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798850535] [2023-08-29 22:52:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:50,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:50,293 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:50,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:52:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:50,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:52:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:50,379 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:52:50,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:52:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:50,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:52:50,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798850535] [2023-08-29 22:52:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798850535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:52:50,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:52:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:52:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567977164] [2023-08-29 22:52:50,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:52:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:52:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:52:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:52:50,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-29 22:52:50,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:50,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-29 22:52:50,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:50,932 INFO L130 PetriNetUnfolder]: 1023/1700 cut-off events. [2023-08-29 22:52:50,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:52:50,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1700 events. 1023/1700 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8678 event pairs, 945 based on Foata normal form. 4/498 useless extension candidates. Maximal degree in co-relation 3380. Up to 1684 conditions per place. [2023-08-29 22:52:50,938 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 59 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-29 22:52:50,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 284 flow [2023-08-29 22:52:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:52:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:52:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-29 22:52:50,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43714517437145173 [2023-08-29 22:52:50,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-29 22:52:50,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-29 22:52:50,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:50,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-29 22:52:50,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,947 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 168 flow. Second operand 3 states and 1078 transitions. [2023-08-29 22:52:50,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 284 flow [2023-08-29 22:52:50,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:52:50,949 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 156 flow [2023-08-29 22:52:50,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-08-29 22:52:50,950 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2023-08-29 22:52:50,950 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 156 flow [2023-08-29 22:52:50,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:50,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:50,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:52:50,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:52:51,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:51,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:51,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1456754, now seen corresponding path program 1 times [2023-08-29 22:52:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771385457] [2023-08-29 22:52:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:51,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:51,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:51,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:52:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:52:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:51,263 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:52:51,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:52:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:51,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:52:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:51,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771385457] [2023-08-29 22:52:51,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771385457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:52:51,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:52:51,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:52:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731397902] [2023-08-29 22:52:51,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:52:51,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:52:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:52:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:52:52,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-29 22:52:52,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:52,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:52,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-29 22:52:52,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:54,119 INFO L130 PetriNetUnfolder]: 1029/1712 cut-off events. [2023-08-29 22:52:54,119 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:52:54,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 1712 events. 1029/1712 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8948 event pairs, 945 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 3446. Up to 1677 conditions per place. [2023-08-29 22:52:54,126 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2023-08-29 22:52:54,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 348 flow [2023-08-29 22:52:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:52:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:52:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2046 transitions. [2023-08-29 22:52:54,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148418491484185 [2023-08-29 22:52:54,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2046 transitions. [2023-08-29 22:52:54,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2046 transitions. [2023-08-29 22:52:54,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:54,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2046 transitions. [2023-08-29 22:52:54,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:54,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:54,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:54,150 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 156 flow. Second operand 6 states and 2046 transitions. [2023-08-29 22:52:54,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 348 flow [2023-08-29 22:52:54,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:52:54,156 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 279 flow [2023-08-29 22:52:54,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2023-08-29 22:52:54,157 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-29 22:52:54,157 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 279 flow [2023-08-29 22:52:54,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:54,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:54,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:52:54,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:52:54,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:54,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:54,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 45228781, now seen corresponding path program 1 times [2023-08-29 22:52:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548402474] [2023-08-29 22:52:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:54,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:54,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:54,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:52:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:52:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:54,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:52:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:54,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:52:54,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548402474] [2023-08-29 22:52:54,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548402474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:52:54,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:52:54,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:52:54,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028355153] [2023-08-29 22:52:54,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:52:54,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:52:54,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:52:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:52:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 822 [2023-08-29 22:52:54,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:54,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:54,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 822 [2023-08-29 22:52:54,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:55,429 INFO L130 PetriNetUnfolder]: 1030/1715 cut-off events. [2023-08-29 22:52:55,429 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:52:55,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1715 events. 1030/1715 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9055 event pairs, 945 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 3492. Up to 1693 conditions per place. [2023-08-29 22:52:55,435 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 67 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2023-08-29 22:52:55,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 438 flow [2023-08-29 22:52:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:52:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:52:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1404 transitions. [2023-08-29 22:52:55,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42700729927007297 [2023-08-29 22:52:55,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1404 transitions. [2023-08-29 22:52:55,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1404 transitions. [2023-08-29 22:52:55,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:55,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1404 transitions. [2023-08-29 22:52:55,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:55,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:55,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:55,447 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 279 flow. Second operand 4 states and 1404 transitions. [2023-08-29 22:52:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 438 flow [2023-08-29 22:52:55,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 412 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 22:52:55,452 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 289 flow [2023-08-29 22:52:55,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-08-29 22:52:55,454 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-29 22:52:55,454 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 289 flow [2023-08-29 22:52:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:55,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:55,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 22:52:55,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:52:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:55,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:55,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 45228782, now seen corresponding path program 1 times [2023-08-29 22:52:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336579404] [2023-08-29 22:52:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:55,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:55,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:52:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:52:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:55,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:52:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:52:55,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:52:55,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336579404] [2023-08-29 22:52:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336579404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:52:55,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:52:55,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:52:55,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797673266] [2023-08-29 22:52:55,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:52:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:52:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:52:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:52:55,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-29 22:52:55,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:55,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:55,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-29 22:52:55,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:56,201 INFO L130 PetriNetUnfolder]: 1030/1712 cut-off events. [2023-08-29 22:52:56,202 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 22:52:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1712 events. 1030/1712 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 9033 event pairs, 945 based on Foata normal form. 2/514 useless extension candidates. Maximal degree in co-relation 3485. Up to 1678 conditions per place. [2023-08-29 22:52:56,209 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 67 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-29 22:52:56,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 429 flow [2023-08-29 22:52:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:52:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:52:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-29 22:52:56,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-08-29 22:52:56,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-29 22:52:56,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-29 22:52:56,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:56,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-29 22:52:56,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:56,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:56,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:56,218 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 289 flow. Second operand 3 states and 1076 transitions. [2023-08-29 22:52:56,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 429 flow [2023-08-29 22:52:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 418 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:52:56,221 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 284 flow [2023-08-29 22:52:56,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-29 22:52:56,223 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-29 22:52:56,223 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 284 flow [2023-08-29 22:52:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:56,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:56,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:52:56,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:52:56,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:56,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:56,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:56,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1402097510, now seen corresponding path program 1 times [2023-08-29 22:52:56,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:56,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708750928] [2023-08-29 22:52:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:56,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:56,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:56,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:52:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:52:56,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:52:56,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:52:56,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708750928] [2023-08-29 22:52:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708750928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:52:56,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:52:56,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:52:56,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886688187] [2023-08-29 22:52:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:52:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:52:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:52:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:52:56,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-29 22:52:56,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:56,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:56,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-29 22:52:56,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:52:57,078 INFO L130 PetriNetUnfolder]: 1029/1711 cut-off events. [2023-08-29 22:52:57,078 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 22:52:57,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 1711 events. 1029/1711 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8946 event pairs, 945 based on Foata normal form. 1/512 useless extension candidates. Maximal degree in co-relation 3484. Up to 1695 conditions per place. [2023-08-29 22:52:57,088 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 69 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-29 22:52:57,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 422 flow [2023-08-29 22:52:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:52:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:52:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-29 22:52:57,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633414436334145 [2023-08-29 22:52:57,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-29 22:52:57,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-29 22:52:57,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:52:57,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-29 22:52:57,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:57,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:57,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:57,096 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 284 flow. Second operand 3 states and 1076 transitions. [2023-08-29 22:52:57,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 422 flow [2023-08-29 22:52:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:52:57,101 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 279 flow [2023-08-29 22:52:57,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-08-29 22:52:57,103 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-29 22:52:57,104 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 279 flow [2023-08-29 22:52:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:57,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:52:57,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:52:57,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:52:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:57,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:52:57,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:52:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 456930193, now seen corresponding path program 1 times [2023-08-29 22:52:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:52:57,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805706084] [2023-08-29 22:52:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:52:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:52:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:52:57,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:52:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:52:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:52:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:52:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:52:57,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:52:57,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:52:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:52:57,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:52:57,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805706084] [2023-08-29 22:52:57,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805706084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:52:57,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:52:57,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 22:52:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432977019] [2023-08-29 22:52:57,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:52:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:52:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:52:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:52:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:52:59,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 822 [2023-08-29 22:52:59,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:52:59,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:52:59,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 822 [2023-08-29 22:52:59,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:00,603 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 [] [2023-08-29 22:53:01,445 INFO L130 PetriNetUnfolder]: 1038/1725 cut-off events. [2023-08-29 22:53:01,445 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:53:01,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3539 conditions, 1725 events. 1038/1725 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 9175 event pairs, 945 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 3525. Up to 1678 conditions per place. [2023-08-29 22:53:01,451 INFO L137 encePairwiseOnDemand]: 812/822 looper letters, 63 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2023-08-29 22:53:01,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 498 flow [2023-08-29 22:53:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:53:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:53:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2357 transitions. [2023-08-29 22:53:01,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962808481056656 [2023-08-29 22:53:01,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2357 transitions. [2023-08-29 22:53:01,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2357 transitions. [2023-08-29 22:53:01,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:01,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2357 transitions. [2023-08-29 22:53:01,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 336.7142857142857) internal successors, (2357), 7 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:01,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:01,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 822.0) internal successors, (6576), 8 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:01,478 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 279 flow. Second operand 7 states and 2357 transitions. [2023-08-29 22:53:01,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 498 flow [2023-08-29 22:53:01,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:01,480 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 414 flow [2023-08-29 22:53:01,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-29 22:53:01,481 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2023-08-29 22:53:01,481 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 414 flow [2023-08-29 22:53:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 327.7142857142857) internal successors, (2294), 7 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:53:01,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:01,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:01,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:01,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 456932131, now seen corresponding path program 1 times [2023-08-29 22:53:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811224163] [2023-08-29 22:53:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:01,695 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:53:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:53:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:01,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:01,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811224163] [2023-08-29 22:53:01,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811224163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:01,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:01,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:53:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574412046] [2023-08-29 22:53:01,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:01,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:53:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:53:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:53:03,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-29 22:53:03,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 414 flow. Second operand has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:03,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:03,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-29 22:53:03,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:04,175 INFO L130 PetriNetUnfolder]: 2069/3437 cut-off events. [2023-08-29 22:53:04,175 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 22:53:04,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7096 conditions, 3437 events. 2069/3437 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 20531 event pairs, 1890 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 7078. Up to 1698 conditions per place. [2023-08-29 22:53:04,186 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 137 selfloop transitions, 20 changer transitions 0/161 dead transitions. [2023-08-29 22:53:04,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1044 flow [2023-08-29 22:53:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:53:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:53:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3027 transitions. [2023-08-29 22:53:04,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091646390916464 [2023-08-29 22:53:04,191 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3027 transitions. [2023-08-29 22:53:04,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3027 transitions. [2023-08-29 22:53:04,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:04,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3027 transitions. [2023-08-29 22:53:04,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 336.3333333333333) internal successors, (3027), 9 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:04,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:04,202 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:04,202 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 414 flow. Second operand 9 states and 3027 transitions. [2023-08-29 22:53:04,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1044 flow [2023-08-29 22:53:04,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 161 transitions, 1003 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-29 22:53:04,204 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 492 flow [2023-08-29 22:53:04,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=492, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2023-08-29 22:53:04,206 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2023-08-29 22:53:04,206 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 492 flow [2023-08-29 22:53:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 325.1) internal successors, (3251), 10 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:04,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:04,207 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:53:04,217 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 (9)] Ended with exit code 0 [2023-08-29 22:53:04,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:04,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:04,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash 454982653, now seen corresponding path program 2 times [2023-08-29 22:53:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:04,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609491451] [2023-08-29 22:53:04,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:53:04,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:04,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:04,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:04,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:53:04,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:53:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:53:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:53:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:04,540 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:53:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:53:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:05,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:05,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609491451] [2023-08-29 22:53:05,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609491451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:05,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:05,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:53:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476424893] [2023-08-29 22:53:05,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:53:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:53:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:53:10,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-29 22:53:10,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:10,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:10,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-29 22:53:10,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:12,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:14,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:15,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:17,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:53:21,106 INFO L130 PetriNetUnfolder]: 2095/3495 cut-off events. [2023-08-29 22:53:21,106 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-08-29 22:53:21,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 3495 events. 2095/3495 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 20904 event pairs, 1890 based on Foata normal form. 16/1104 useless extension candidates. Maximal degree in co-relation 7357. Up to 3378 conditions per place. [2023-08-29 22:53:21,130 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 76 selfloop transitions, 59 changer transitions 0/139 dead transitions. [2023-08-29 22:53:21,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1122 flow [2023-08-29 22:53:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:53:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:53:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5058 transitions. [2023-08-29 22:53:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021897810218977 [2023-08-29 22:53:21,138 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5058 transitions. [2023-08-29 22:53:21,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5058 transitions. [2023-08-29 22:53:21,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:21,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5058 transitions. [2023-08-29 22:53:21,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 337.2) internal successors, (5058), 15 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,155 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,155 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 492 flow. Second operand 15 states and 5058 transitions. [2023-08-29 22:53:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1122 flow [2023-08-29 22:53:21,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1117 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:53:21,158 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 992 flow [2023-08-29 22:53:21,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=992, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-08-29 22:53:21,159 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-29 22:53:21,159 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 992 flow [2023-08-29 22:53:21,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:21,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:21,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:21,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:21,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:21,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1023477905, now seen corresponding path program 1 times [2023-08-29 22:53:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549643221] [2023-08-29 22:53:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:21,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:21,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:53:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:53:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:53:21,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:21,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549643221] [2023-08-29 22:53:21,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549643221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:21,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:21,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:53:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193429599] [2023-08-29 22:53:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:53:21,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:53:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:53:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 822 [2023-08-29 22:53:21,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 992 flow. Second operand has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:21,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:21,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 822 [2023-08-29 22:53:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:22,376 INFO L130 PetriNetUnfolder]: 2093/3493 cut-off events. [2023-08-29 22:53:22,376 INFO L131 PetriNetUnfolder]: For 401/401 co-relation queries the response was YES. [2023-08-29 22:53:22,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 3493 events. 2093/3493 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 20931 event pairs, 1890 based on Foata normal form. 2/1093 useless extension candidates. Maximal degree in co-relation 7493. Up to 3450 conditions per place. [2023-08-29 22:53:22,389 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 111 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2023-08-29 22:53:22,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 1210 flow [2023-08-29 22:53:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:53:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:53:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1417 transitions. [2023-08-29 22:53:22,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309610705596107 [2023-08-29 22:53:22,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1417 transitions. [2023-08-29 22:53:22,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1417 transitions. [2023-08-29 22:53:22,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:22,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1417 transitions. [2023-08-29 22:53:22,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:22,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:22,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:22,401 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 992 flow. Second operand 4 states and 1417 transitions. [2023-08-29 22:53:22,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 1210 flow [2023-08-29 22:53:22,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1076 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-29 22:53:22,406 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 854 flow [2023-08-29 22:53:22,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-08-29 22:53:22,407 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-08-29 22:53:22,407 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 854 flow [2023-08-29 22:53:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:22,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:22,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:22,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:22,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:22,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:22,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash 110745844, now seen corresponding path program 1 times [2023-08-29 22:53:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964839503] [2023-08-29 22:53:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:22,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:22,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:22,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:22,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:53:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:53:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:22,835 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:53:22,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 22:53:22,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 22:53:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:22,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:53:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:22,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:53:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:22,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:53:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:53:23,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:23,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964839503] [2023-08-29 22:53:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964839503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:23,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:23,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:53:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133910802] [2023-08-29 22:53:23,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:53:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:53:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:53:23,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 822 [2023-08-29 22:53:23,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 854 flow. Second operand has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:23,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:23,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 822 [2023-08-29 22:53:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:23,810 INFO L130 PetriNetUnfolder]: 1563/2689 cut-off events. [2023-08-29 22:53:23,810 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-29 22:53:23,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2689 events. 1563/2689 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 15828 event pairs, 1396 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 5803. Up to 2657 conditions per place. [2023-08-29 22:53:23,818 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 119 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-08-29 22:53:23,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 124 transitions, 1077 flow [2023-08-29 22:53:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-08-29 22:53:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367396593673966 [2023-08-29 22:53:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-08-29 22:53:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-08-29 22:53:23,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:23,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-08-29 22:53:23,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:23,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:23,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:23,824 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 854 flow. Second operand 3 states and 1077 transitions. [2023-08-29 22:53:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 124 transitions, 1077 flow [2023-08-29 22:53:23,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 1063 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:53:23,829 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 825 flow [2023-08-29 22:53:23,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=825, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2023-08-29 22:53:23,829 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-08-29 22:53:23,829 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 825 flow [2023-08-29 22:53:23,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:23,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:23,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:23,838 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 (12)] Ended with exit code 0 [2023-08-29 22:53:24,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:24,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:24,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 110745843, now seen corresponding path program 1 times [2023-08-29 22:53:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499579461] [2023-08-29 22:53:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:24,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:24,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:24,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:53:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:53:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:24,198 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-29 22:53:24,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 22:53:24,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:24,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:53:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:24,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:53:24,286 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:53:24,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:53:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:53:24,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:53:24,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499579461] [2023-08-29 22:53:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499579461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:24,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:53:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169107018] [2023-08-29 22:53:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:24,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:53:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:53:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:53:24,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 822 [2023-08-29 22:53:24,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 825 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:24,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:24,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 822 [2023-08-29 22:53:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:24,967 INFO L130 PetriNetUnfolder]: 1033/1885 cut-off events. [2023-08-29 22:53:24,968 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-29 22:53:24,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1885 events. 1033/1885 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 10853 event pairs, 902 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 4177. Up to 1853 conditions per place. [2023-08-29 22:53:24,973 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 115 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2023-08-29 22:53:24,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1040 flow [2023-08-29 22:53:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2023-08-29 22:53:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383617193836172 [2023-08-29 22:53:24,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2023-08-29 22:53:24,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2023-08-29 22:53:24,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:24,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2023-08-29 22:53:24,999 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) [2023-08-29 22:53:25,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:25,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:25,001 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 825 flow. Second operand 3 states and 1081 transitions. [2023-08-29 22:53:25,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1040 flow [2023-08-29 22:53:25,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 1039 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:25,005 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 809 flow [2023-08-29 22:53:25,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=809, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2023-08-29 22:53:25,006 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 32 predicate places. [2023-08-29 22:53:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 809 flow [2023-08-29 22:53:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:25,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:25,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:25,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:25,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:25,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:25,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -861844025, now seen corresponding path program 1 times [2023-08-29 22:53:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:25,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740225136] [2023-08-29 22:53:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:25,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:25,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:25,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:53:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:25,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:53:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:25,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:53:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:53:25,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:53:25,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740225136] [2023-08-29 22:53:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740225136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:25,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:53:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886565728] [2023-08-29 22:53:25,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:25,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:53:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:53:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:53:31,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-08-29 22:53:31,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 809 flow. Second operand has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:31,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:31,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-08-29 22:53:31,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:33,233 INFO L130 PetriNetUnfolder]: 3003/5435 cut-off events. [2023-08-29 22:53:33,233 INFO L131 PetriNetUnfolder]: For 541/541 co-relation queries the response was YES. [2023-08-29 22:53:33,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11398 conditions, 5435 events. 3003/5435 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38778 event pairs, 2706 based on Foata normal form. 2/2281 useless extension candidates. Maximal degree in co-relation 11369. Up to 1834 conditions per place. [2023-08-29 22:53:33,247 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 182 selfloop transitions, 23 changer transitions 0/209 dead transitions. [2023-08-29 22:53:33,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 209 transitions, 1491 flow [2023-08-29 22:53:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:53:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:53:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2679 transitions. [2023-08-29 22:53:33,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073905109489051 [2023-08-29 22:53:33,252 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2679 transitions. [2023-08-29 22:53:33,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2679 transitions. [2023-08-29 22:53:33,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:33,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2679 transitions. [2023-08-29 22:53:33,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.875) internal successors, (2679), 8 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:33,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:33,260 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 822.0) internal successors, (7398), 9 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:33,260 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 809 flow. Second operand 8 states and 2679 transitions. [2023-08-29 22:53:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 209 transitions, 1491 flow [2023-08-29 22:53:33,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 209 transitions, 1490 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:53:33,266 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 927 flow [2023-08-29 22:53:33,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2023-08-29 22:53:33,267 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2023-08-29 22:53:33,267 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 927 flow [2023-08-29 22:53:33,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 319.38461538461536) internal successors, (4152), 13 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:33,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:33,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:33,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:53:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:33,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:33,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash -861886181, now seen corresponding path program 1 times [2023-08-29 22:53:33,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:33,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836125350] [2023-08-29 22:53:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:33,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:33,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:33,481 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 (15)] Waiting until timeout for monitored process [2023-08-29 22:53:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:53:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:53:33,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:53:33,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:33,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836125350] [2023-08-29 22:53:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836125350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:33,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 22:53:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089916955] [2023-08-29 22:53:33,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:33,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:53:33,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:53:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:53:35,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-29 22:53:35,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 927 flow. Second operand has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:35,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:35,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-29 22:53:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:36,203 INFO L130 PetriNetUnfolder]: 2019/3669 cut-off events. [2023-08-29 22:53:36,203 INFO L131 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2023-08-29 22:53:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7916 conditions, 3669 events. 2019/3669 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24150 event pairs, 1804 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 7883. Up to 1815 conditions per place. [2023-08-29 22:53:36,214 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 131 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2023-08-29 22:53:36,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 1396 flow [2023-08-29 22:53:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:53:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:53:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3014 transitions. [2023-08-29 22:53:36,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-29 22:53:36,225 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3014 transitions. [2023-08-29 22:53:36,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3014 transitions. [2023-08-29 22:53:36,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:36,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3014 transitions. [2023-08-29 22:53:36,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 334.8888888888889) internal successors, (3014), 9 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:36,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:36,234 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:36,234 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 927 flow. Second operand 9 states and 3014 transitions. [2023-08-29 22:53:36,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 1396 flow [2023-08-29 22:53:36,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1366 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:53:36,241 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 987 flow [2023-08-29 22:53:36,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2023-08-29 22:53:36,242 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2023-08-29 22:53:36,242 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 987 flow [2023-08-29 22:53:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 325.4166666666667) internal successors, (3905), 12 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:36,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:36,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:36,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-29 22:53:36,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:36,450 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:36,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash -863609600, now seen corresponding path program 1 times [2023-08-29 22:53:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313956037] [2023-08-29 22:53:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:36,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:36,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:36,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 22:53:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:53:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:36,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:53:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:53:36,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:53:37,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313956037] [2023-08-29 22:53:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313956037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:37,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 22:53:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861120422] [2023-08-29 22:53:37,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:53:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:53:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-29 22:53:47,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 822 [2023-08-29 22:53:47,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 987 flow. Second operand has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:47,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:47,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 822 [2023-08-29 22:53:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:50,738 INFO L130 PetriNetUnfolder]: 3014/5474 cut-off events. [2023-08-29 22:53:50,739 INFO L131 PetriNetUnfolder]: For 1162/1162 co-relation queries the response was YES. [2023-08-29 22:53:50,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11732 conditions, 5474 events. 3014/5474 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38132 event pairs, 2706 based on Foata normal form. 6/2324 useless extension candidates. Maximal degree in co-relation 11699. Up to 1805 conditions per place. [2023-08-29 22:53:50,762 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 216 selfloop transitions, 51 changer transitions 0/271 dead transitions. [2023-08-29 22:53:50,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 271 transitions, 2391 flow [2023-08-29 22:53:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:53:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:53:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4929 transitions. [2023-08-29 22:53:50,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997566909975669 [2023-08-29 22:53:50,769 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4929 transitions. [2023-08-29 22:53:50,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4929 transitions. [2023-08-29 22:53:50,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:50,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4929 transitions. [2023-08-29 22:53:50,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 328.6) internal successors, (4929), 15 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:50,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:50,782 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:50,782 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 987 flow. Second operand 15 states and 4929 transitions. [2023-08-29 22:53:50,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 271 transitions, 2391 flow [2023-08-29 22:53:50,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 2303 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-29 22:53:50,789 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1527 flow [2023-08-29 22:53:50,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1527, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2023-08-29 22:53:50,790 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 62 predicate places. [2023-08-29 22:53:50,790 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1527 flow [2023-08-29 22:53:50,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 319.1764705882353) internal successors, (5426), 17 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:50,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:50,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:50,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-29 22:53:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:50,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:53:50,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash -947396707, now seen corresponding path program 1 times [2023-08-29 22:53:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:50,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884040374] [2023-08-29 22:53:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:51,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:51,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 22:53:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-29 22:53:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:51,208 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:53:51,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:53:51,255 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:53:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:53:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:51,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:53:51,385 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:53:51,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:53:51,514 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:53:51,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:53:51,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:53:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:53:51,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:53:51,598 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:53:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:53:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:53:51,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:53:55,973 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_~get_2~0.offset .cse0))) (and (or (bvule (bvadd c_~get_2~0.offset .cse0) .cse1) (forall ((v_ArrVal_394 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_131| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132|))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132| v_ArrVal_394) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_131|) (_ bv0 1)))))) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132| (_ BitVec 32))) (or (forall ((v_ArrVal_394 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_131| (_ BitVec 32)) (v_ArrVal_395 (_ BitVec 32))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132| v_ArrVal_394) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_131|) (_ bv0 1))) (forall ((v_ArrVal_396 (_ BitVec 32))) (bvule .cse1 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132| v_ArrVal_395) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_131| v_ArrVal_396) c_~get_2~0.base))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_132|)))))))) is different from false [2023-08-29 22:54:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:54:00,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884040374] [2023-08-29 22:54:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884040374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:00,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-29 22:54:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702051346] [2023-08-29 22:54:00,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:54:00,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:54:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=65, Unknown=2, NotChecked=16, Total=110 [2023-08-29 22:54:03,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 822 [2023-08-29 22:54:03,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1527 flow. Second operand has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:03,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:03,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 822 [2023-08-29 22:54:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:22,348 WARN L222 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:54:31,488 INFO L130 PetriNetUnfolder]: 2866/5222 cut-off events. [2023-08-29 22:54:31,489 INFO L131 PetriNetUnfolder]: For 1486/1486 co-relation queries the response was YES. [2023-08-29 22:54:31,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11436 conditions, 5222 events. 2866/5222 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36421 event pairs, 2126 based on Foata normal form. 0/2298 useless extension candidates. Maximal degree in co-relation 11396. Up to 3382 conditions per place. [2023-08-29 22:54:31,507 INFO L137 encePairwiseOnDemand]: 801/822 looper letters, 231 selfloop transitions, 52 changer transitions 0/283 dead transitions. [2023-08-29 22:54:31,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 283 transitions, 2614 flow [2023-08-29 22:54:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 22:54:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 22:54:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3617 transitions. [2023-08-29 22:54:31,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31430309350017377 [2023-08-29 22:54:31,513 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3617 transitions. [2023-08-29 22:54:31,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3617 transitions. [2023-08-29 22:54:31,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:31,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3617 transitions. [2023-08-29 22:54:31,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 258.35714285714283) internal successors, (3617), 14 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:31,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:31,526 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 822.0) internal successors, (12330), 15 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:31,526 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1527 flow. Second operand 14 states and 3617 transitions. [2023-08-29 22:54:31,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 283 transitions, 2614 flow [2023-08-29 22:54:31,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 283 transitions, 2573 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-29 22:54:31,535 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1733 flow [2023-08-29 22:54:31,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1733, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2023-08-29 22:54:31,536 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 75 predicate places. [2023-08-29 22:54:31,536 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1733 flow [2023-08-29 22:54:31,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:31,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:31,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:54:31,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:31,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:54:31,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash -947396254, now seen corresponding path program 1 times [2023-08-29 22:54:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:31,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197666003] [2023-08-29 22:54:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:31,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:31,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 22:54:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-29 22:54:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:31,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:54:31,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:54:32,103 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:54:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:54:32,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:54:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:54:32,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:54:32,195 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:54:32,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:54:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:54:32,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:39,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:54:39,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:54:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:54:39,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197666003] [2023-08-29 22:54:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197666003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:39,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2023-08-29 22:54:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278387767] [2023-08-29 22:54:39,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:54:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:54:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:54:58,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:55:02,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 822 [2023-08-29 22:55:02,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1733 flow. Second operand has 16 states, 16 states have (on average 294.375) internal successors, (4710), 16 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:02,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:02,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 822 [2023-08-29 22:55:02,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:33,761 WARN L222 SmtUtils]: Spent 19.48s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:55:48,453 WARN L222 SmtUtils]: Spent 13.18s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:55:55,768 WARN L222 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:56:05,429 INFO L130 PetriNetUnfolder]: 2704/5066 cut-off events. [2023-08-29 22:56:05,430 INFO L131 PetriNetUnfolder]: For 2514/2582 co-relation queries the response was YES. [2023-08-29 22:56:05,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12863 conditions, 5066 events. 2704/5066 cut-off events. For 2514/2582 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36706 event pairs, 1466 based on Foata normal form. 26/2640 useless extension candidates. Maximal degree in co-relation 12817. Up to 2348 conditions per place. [2023-08-29 22:56:05,447 INFO L137 encePairwiseOnDemand]: 794/822 looper letters, 199 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2023-08-29 22:56:05,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 300 transitions, 2872 flow [2023-08-29 22:56:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 22:56:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 22:56:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5755 transitions. [2023-08-29 22:56:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36848508131642976 [2023-08-29 22:56:05,454 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5755 transitions. [2023-08-29 22:56:05,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5755 transitions. [2023-08-29 22:56:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:05,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5755 transitions. [2023-08-29 22:56:05,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 302.89473684210526) internal successors, (5755), 19 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:05,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:05,467 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 822.0) internal successors, (16440), 20 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:05,467 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1733 flow. Second operand 19 states and 5755 transitions. [2023-08-29 22:56:05,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 300 transitions, 2872 flow [2023-08-29 22:56:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 300 transitions, 2762 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-29 22:56:05,477 INFO L231 Difference]: Finished difference. Result has 160 places, 198 transitions, 2221 flow [2023-08-29 22:56:05,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2221, PETRI_PLACES=160, PETRI_TRANSITIONS=198} [2023-08-29 22:56:05,477 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 92 predicate places. [2023-08-29 22:56:05,477 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 198 transitions, 2221 flow [2023-08-29 22:56:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 294.375) internal successors, (4710), 16 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:05,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:05,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:05,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:05,686 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:56:05,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1824027223, now seen corresponding path program 2 times [2023-08-29 22:56:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:05,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677483039] [2023-08-29 22:56:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:56:05,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:05,688 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:05,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 22:56:05,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:56:05,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:56:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:56:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:05,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:56:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-29 22:56:05,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:56:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-29 22:56:06,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677483039] [2023-08-29 22:56:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677483039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:56:06,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:56:06,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-08-29 22:56:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090212692] [2023-08-29 22:56:06,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:56:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:56:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:56:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:56:09,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-29 22:56:09,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 198 transitions, 2221 flow. Second operand has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:09,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:09,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-29 22:56:09,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:10,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:11,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:13,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:17,214 INFO L130 PetriNetUnfolder]: 7960/15464 cut-off events. [2023-08-29 22:56:17,214 INFO L131 PetriNetUnfolder]: For 12690/13441 co-relation queries the response was YES. [2023-08-29 22:56:17,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50732 conditions, 15464 events. 7960/15464 cut-off events. For 12690/13441 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 139190 event pairs, 5413 based on Foata normal form. 18/8530 useless extension candidates. Maximal degree in co-relation 50679. Up to 4896 conditions per place. [2023-08-29 22:56:17,343 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 351 selfloop transitions, 86 changer transitions 0/442 dead transitions. [2023-08-29 22:56:17,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 442 transitions, 4545 flow [2023-08-29 22:56:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:56:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:56:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3155 transitions. [2023-08-29 22:56:17,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42646661259799945 [2023-08-29 22:56:17,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3155 transitions. [2023-08-29 22:56:17,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3155 transitions. [2023-08-29 22:56:17,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:17,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3155 transitions. [2023-08-29 22:56:17,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 350.55555555555554) internal successors, (3155), 9 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:17,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:17,354 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 822.0) internal successors, (8220), 10 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:17,354 INFO L175 Difference]: Start difference. First operand has 160 places, 198 transitions, 2221 flow. Second operand 9 states and 3155 transitions. [2023-08-29 22:56:17,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 442 transitions, 4545 flow [2023-08-29 22:56:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 442 transitions, 4479 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-29 22:56:17,540 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2500 flow [2023-08-29 22:56:17,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2500, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2023-08-29 22:56:17,541 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 98 predicate places. [2023-08-29 22:56:17,541 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2500 flow [2023-08-29 22:56:17,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:17,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:17,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:17,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:17,750 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:56:17,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash -947396284, now seen corresponding path program 1 times [2023-08-29 22:56:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:17,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210201234] [2023-08-29 22:56:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:17,753 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:17,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 22:56:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:56:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:17,929 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:56:17,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-29 22:56:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:17,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:56:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:17,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:56:18,015 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:56:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:56:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:56:18,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:56:18,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210201234] [2023-08-29 22:56:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210201234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:18,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:18,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389292814] [2023-08-29 22:56:18,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:18,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:56:18,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:56:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:56:18,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 822 [2023-08-29 22:56:18,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2500 flow. Second operand has 5 states, 5 states have (on average 340.2) internal successors, (1701), 5 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:18,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:18,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 822 [2023-08-29 22:56:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:20,821 INFO L130 PetriNetUnfolder]: 7526/14535 cut-off events. [2023-08-29 22:56:20,821 INFO L131 PetriNetUnfolder]: For 11558/12067 co-relation queries the response was YES. [2023-08-29 22:56:20,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48437 conditions, 14535 events. 7526/14535 cut-off events. For 11558/12067 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 131141 event pairs, 4090 based on Foata normal form. 10/8322 useless extension candidates. Maximal degree in co-relation 48382. Up to 14152 conditions per place. [2023-08-29 22:56:20,904 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 195 selfloop transitions, 1 changer transitions 0/201 dead transitions. [2023-08-29 22:56:20,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 201 transitions, 2888 flow [2023-08-29 22:56:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2023-08-29 22:56:20,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302514193025142 [2023-08-29 22:56:20,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2023-08-29 22:56:20,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2023-08-29 22:56:20,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:20,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2023-08-29 22:56:20,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:20,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:20,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:20,910 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2500 flow. Second operand 3 states and 1061 transitions. [2023-08-29 22:56:20,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 201 transitions, 2888 flow [2023-08-29 22:56:21,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 201 transitions, 2876 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:21,065 INFO L231 Difference]: Finished difference. Result has 165 places, 201 transitions, 2486 flow [2023-08-29 22:56:21,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2486, PETRI_PLACES=165, PETRI_TRANSITIONS=201} [2023-08-29 22:56:21,066 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 97 predicate places. [2023-08-29 22:56:21,066 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 201 transitions, 2486 flow [2023-08-29 22:56:21,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.2) internal successors, (1701), 5 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:21,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:21,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:21,074 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 (20)] Ended with exit code 0 [2023-08-29 22:56:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:21,274 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:56:21,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash -947396282, now seen corresponding path program 1 times [2023-08-29 22:56:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613522463] [2023-08-29 22:56:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:21,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 22:56:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:21,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:56:21,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:21,458 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 22:56:21,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 22:56:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-29 22:56:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:21,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:56:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:21,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:56:21,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:21,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:56:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:56:21,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:56:21,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613522463] [2023-08-29 22:56:21,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613522463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:21,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:21,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922300502] [2023-08-29 22:56:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:21,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:56:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:56:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:56:21,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 822 [2023-08-29 22:56:21,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 201 transitions, 2486 flow. Second operand has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:21,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:21,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 822 [2023-08-29 22:56:21,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:24,191 INFO L130 PetriNetUnfolder]: 7072/13586 cut-off events. [2023-08-29 22:56:24,191 INFO L131 PetriNetUnfolder]: For 10964/11473 co-relation queries the response was YES. [2023-08-29 22:56:24,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45839 conditions, 13586 events. 7072/13586 cut-off events. For 10964/11473 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 121365 event pairs, 3787 based on Foata normal form. 10/8098 useless extension candidates. Maximal degree in co-relation 45783. Up to 13203 conditions per place. [2023-08-29 22:56:24,268 INFO L137 encePairwiseOnDemand]: 819/822 looper letters, 193 selfloop transitions, 1 changer transitions 0/199 dead transitions. [2023-08-29 22:56:24,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 199 transitions, 2870 flow [2023-08-29 22:56:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-08-29 22:56:24,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306569343065693 [2023-08-29 22:56:24,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-08-29 22:56:24,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-08-29 22:56:24,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:24,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-08-29 22:56:24,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:24,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:24,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:24,273 INFO L175 Difference]: Start difference. First operand has 165 places, 201 transitions, 2486 flow. Second operand 3 states and 1062 transitions. [2023-08-29 22:56:24,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 199 transitions, 2870 flow [2023-08-29 22:56:24,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 199 transitions, 2869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:24,407 INFO L231 Difference]: Finished difference. Result has 164 places, 199 transitions, 2483 flow [2023-08-29 22:56:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2483, PETRI_PLACES=164, PETRI_TRANSITIONS=199} [2023-08-29 22:56:24,408 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-29 22:56:24,408 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 199 transitions, 2483 flow [2023-08-29 22:56:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:24,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:24,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:24,620 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:56:24,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 695483782, now seen corresponding path program 1 times [2023-08-29 22:56:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312102146] [2023-08-29 22:56:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:24,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:24,622 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:24,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 22:56:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:56:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:24,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:56:24,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:56:24,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:56:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:56:24,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:56:24,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312102146] [2023-08-29 22:56:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312102146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:24,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:24,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552482175] [2023-08-29 22:56:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:56:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:56:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:56:25,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-29 22:56:25,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 199 transitions, 2483 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:25,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:25,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-29 22:56:25,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:26,986 INFO L130 PetriNetUnfolder]: 5682/11086 cut-off events. [2023-08-29 22:56:26,986 INFO L131 PetriNetUnfolder]: For 10641/11150 co-relation queries the response was YES. [2023-08-29 22:56:27,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36851 conditions, 11086 events. 5682/11086 cut-off events. For 10641/11150 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 97074 event pairs, 3113 based on Foata normal form. 10/7072 useless extension candidates. Maximal degree in co-relation 36794. Up to 10598 conditions per place. [2023-08-29 22:56:27,062 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 128 selfloop transitions, 58 changer transitions 0/191 dead transitions. [2023-08-29 22:56:27,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 191 transitions, 2795 flow [2023-08-29 22:56:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:56:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:56:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1379 transitions. [2023-08-29 22:56:27,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194038929440389 [2023-08-29 22:56:27,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1379 transitions. [2023-08-29 22:56:27,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1379 transitions. [2023-08-29 22:56:27,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:27,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1379 transitions. [2023-08-29 22:56:27,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:27,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:27,069 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:27,069 INFO L175 Difference]: Start difference. First operand has 164 places, 199 transitions, 2483 flow. Second operand 4 states and 1379 transitions. [2023-08-29 22:56:27,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 191 transitions, 2795 flow [2023-08-29 22:56:27,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 191 transitions, 2794 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:27,168 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 2538 flow [2023-08-29 22:56:27,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2538, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2023-08-29 22:56:27,169 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-29 22:56:27,169 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 2538 flow [2023-08-29 22:56:27,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:27,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:27,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:27,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:27,374 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:56:27,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash 695483783, now seen corresponding path program 1 times [2023-08-29 22:56:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:27,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139117056] [2023-08-29 22:56:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:27,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:27,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:27,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 22:56:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:56:27,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:27,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:56:27,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:56:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:27,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:56:27,731 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:56:27,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:56:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:56:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:56:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 22:56:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:56:30,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:30,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139117056] [2023-08-29 22:56:30,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139117056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:56:30,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:56:30,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:56:30,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106874666] [2023-08-29 22:56:30,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:56:30,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:56:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:56:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:56:32,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:34,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:36,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:39,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:42,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:44,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:46,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:49,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:51,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:54,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:56,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:56:58,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:00,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:03,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:05,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:08,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:10,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:12,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:14,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:57:14,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 822 [2023-08-29 22:57:14,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 2538 flow. Second operand has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:14,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:14,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 822 [2023-08-29 22:57:14,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:57:18,990 INFO L130 PetriNetUnfolder]: 5123/9831 cut-off events. [2023-08-29 22:57:18,990 INFO L131 PetriNetUnfolder]: For 12267/12615 co-relation queries the response was YES. [2023-08-29 22:57:19,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32011 conditions, 9831 events. 5123/9831 cut-off events. For 12267/12615 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 81575 event pairs, 3052 based on Foata normal form. 10/7100 useless extension candidates. Maximal degree in co-relation 31954. Up to 5606 conditions per place. [2023-08-29 22:57:19,053 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 169 selfloop transitions, 62 changer transitions 0/233 dead transitions. [2023-08-29 22:57:19,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 233 transitions, 3225 flow [2023-08-29 22:57:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:57:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:57:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3051 transitions. [2023-08-29 22:57:19,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711678832116788 [2023-08-29 22:57:19,057 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3051 transitions. [2023-08-29 22:57:19,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3051 transitions. [2023-08-29 22:57:19,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:57:19,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3051 transitions. [2023-08-29 22:57:19,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 305.1) internal successors, (3051), 10 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:19,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:19,063 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:19,063 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 2538 flow. Second operand 10 states and 3051 transitions. [2023-08-29 22:57:19,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 233 transitions, 3225 flow [2023-08-29 22:57:19,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 3137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:57:19,155 INFO L231 Difference]: Finished difference. Result has 169 places, 183 transitions, 2514 flow [2023-08-29 22:57:19,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2514, PETRI_PLACES=169, PETRI_TRANSITIONS=183} [2023-08-29 22:57:19,156 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 101 predicate places. [2023-08-29 22:57:19,156 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 183 transitions, 2514 flow [2023-08-29 22:57:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:19,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:57:19,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:57:19,165 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 (23)] Ended with exit code 0 [2023-08-29 22:57:19,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:19,365 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:57:19,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:57:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash -710304319, now seen corresponding path program 1 times [2023-08-29 22:57:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:57:19,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078904577] [2023-08-29 22:57:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:57:19,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:57:19,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:57:19,369 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 (24)] Waiting until timeout for monitored process [2023-08-29 22:57:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:57:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:57:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:57:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:57:19,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:57:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:57:19,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:57:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078904577] [2023-08-29 22:57:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078904577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:57:19,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:57:19,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 22:57:19,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022993458] [2023-08-29 22:57:19,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:57:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 22:57:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:57:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 22:57:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-29 22:57:21,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 822 [2023-08-29 22:57:21,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 183 transitions, 2514 flow. Second operand has 15 states, 15 states have (on average 325.46666666666664) internal successors, (4882), 15 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:21,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:21,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 822 [2023-08-29 22:57:21,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:57:24,854 INFO L130 PetriNetUnfolder]: 6031/12126 cut-off events. [2023-08-29 22:57:24,855 INFO L131 PetriNetUnfolder]: For 15592/16660 co-relation queries the response was YES. [2023-08-29 22:57:24,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39613 conditions, 12126 events. 6031/12126 cut-off events. For 15592/16660 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 110315 event pairs, 4280 based on Foata normal form. 8/8349 useless extension candidates. Maximal degree in co-relation 39555. Up to 6082 conditions per place. [2023-08-29 22:57:24,928 INFO L137 encePairwiseOnDemand]: 811/822 looper letters, 214 selfloop transitions, 77 changer transitions 0/296 dead transitions. [2023-08-29 22:57:24,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 296 transitions, 4021 flow [2023-08-29 22:57:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:57:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:57:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4973 transitions. [2023-08-29 22:57:24,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40332522303325224 [2023-08-29 22:57:24,933 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4973 transitions. [2023-08-29 22:57:24,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4973 transitions. [2023-08-29 22:57:24,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:57:24,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4973 transitions. [2023-08-29 22:57:24,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 331.53333333333336) internal successors, (4973), 15 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:24,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:24,942 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:24,943 INFO L175 Difference]: Start difference. First operand has 169 places, 183 transitions, 2514 flow. Second operand 15 states and 4973 transitions. [2023-08-29 22:57:24,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 296 transitions, 4021 flow [2023-08-29 22:57:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 296 transitions, 3989 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 22:57:25,052 INFO L231 Difference]: Finished difference. Result has 180 places, 199 transitions, 2953 flow [2023-08-29 22:57:25,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2953, PETRI_PLACES=180, PETRI_TRANSITIONS=199} [2023-08-29 22:57:25,053 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 112 predicate places. [2023-08-29 22:57:25,053 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 199 transitions, 2953 flow [2023-08-29 22:57:25,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 325.46666666666664) internal successors, (4882), 15 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:25,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:57:25,054 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 22:57:25,061 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 (24)] Forceful destruction successful, exit code 0 [2023-08-29 22:57:25,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:25,261 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:57:25,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:57:25,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1007192099, now seen corresponding path program 3 times [2023-08-29 22:57:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:57:25,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053300779] [2023-08-29 22:57:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:57:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:57:25,263 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:57:25,265 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 (25)] Waiting until timeout for monitored process [2023-08-29 22:57:25,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:57:25,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:57:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:57:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:57:25,463 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:57:25,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:57:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:25,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:57:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:28,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:57:28,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053300779] [2023-08-29 22:57:28,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053300779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:57:28,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:57:28,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 22:57:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448340199] [2023-08-29 22:57:28,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:57:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 22:57:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:57:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 22:57:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 22:57:59,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-29 22:57:59,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 199 transitions, 2953 flow. Second operand has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:59,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:59,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-29 22:57:59,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:08,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:10,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:12,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:14,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:16,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:18,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:20,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:22,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:23,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:25,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:33,718 INFO L130 PetriNetUnfolder]: 6057/12200 cut-off events. [2023-08-29 22:58:33,719 INFO L131 PetriNetUnfolder]: For 17307/18063 co-relation queries the response was YES. [2023-08-29 22:58:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40252 conditions, 12200 events. 6057/12200 cut-off events. For 17307/18063 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 110760 event pairs, 3337 based on Foata normal form. 43/8466 useless extension candidates. Maximal degree in co-relation 40192. Up to 11577 conditions per place. [2023-08-29 22:58:33,810 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 107 selfloop transitions, 148 changer transitions 0/260 dead transitions. [2023-08-29 22:58:33,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 260 transitions, 4391 flow [2023-08-29 22:58:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 22:58:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 22:58:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 8049 transitions. [2023-08-29 22:58:33,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40799878345498786 [2023-08-29 22:58:33,817 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 8049 transitions. [2023-08-29 22:58:33,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 8049 transitions. [2023-08-29 22:58:33,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:33,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 8049 transitions. [2023-08-29 22:58:33,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 335.375) internal successors, (8049), 24 states have internal predecessors, (8049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:33,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 822.0) internal successors, (20550), 25 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:33,855 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 822.0) internal successors, (20550), 25 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:33,855 INFO L175 Difference]: Start difference. First operand has 180 places, 199 transitions, 2953 flow. Second operand 24 states and 8049 transitions. [2023-08-29 22:58:33,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 260 transitions, 4391 flow [2023-08-29 22:58:34,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 4097 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-29 22:58:34,004 INFO L231 Difference]: Finished difference. Result has 205 places, 248 transitions, 3963 flow [2023-08-29 22:58:34,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3963, PETRI_PLACES=205, PETRI_TRANSITIONS=248} [2023-08-29 22:58:34,005 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 137 predicate places. [2023-08-29 22:58:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 248 transitions, 3963 flow [2023-08-29 22:58:34,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:34,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:34,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:58:34,015 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 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:34,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:58:34,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:58:34,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1541585230, now seen corresponding path program 2 times [2023-08-29 22:58:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:58:34,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104829076] [2023-08-29 22:58:34,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:58:34,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:58:34,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:58:34,220 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:58:34,222 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 (26)] Waiting until timeout for monitored process [2023-08-29 22:58:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:58:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:58:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:58:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:58:34,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:58:34,349 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:58:34,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:58:34,364 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:58:34,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:58:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:58:34,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:58:34,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:58:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104829076] [2023-08-29 22:58:34,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104829076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:34,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:58:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:58:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065486781] [2023-08-29 22:58:34,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:58:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:58:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:58:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:58:34,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-29 22:58:34,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 248 transitions, 3963 flow. Second operand has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:34,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:34,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-29 22:58:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:36,194 INFO L130 PetriNetUnfolder]: 4889/9621 cut-off events. [2023-08-29 22:58:36,194 INFO L131 PetriNetUnfolder]: For 16114/16610 co-relation queries the response was YES. [2023-08-29 22:58:36,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31241 conditions, 9621 events. 4889/9621 cut-off events. For 16114/16610 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 81613 event pairs, 2525 based on Foata normal form. 1428/7790 useless extension candidates. Maximal degree in co-relation 31170. Up to 9332 conditions per place. [2023-08-29 22:58:36,269 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 194 selfloop transitions, 43 changer transitions 0/240 dead transitions. [2023-08-29 22:58:36,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 240 transitions, 4379 flow [2023-08-29 22:58:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:58:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:58:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1360 transitions. [2023-08-29 22:58:36,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41362530413625304 [2023-08-29 22:58:36,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1360 transitions. [2023-08-29 22:58:36,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1360 transitions. [2023-08-29 22:58:36,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:36,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1360 transitions. [2023-08-29 22:58:36,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:36,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:36,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:36,284 INFO L175 Difference]: Start difference. First operand has 205 places, 248 transitions, 3963 flow. Second operand 4 states and 1360 transitions. [2023-08-29 22:58:36,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 240 transitions, 4379 flow [2023-08-29 22:58:36,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 240 transitions, 4084 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-08-29 22:58:36,322 INFO L231 Difference]: Finished difference. Result has 197 places, 240 transitions, 3696 flow [2023-08-29 22:58:36,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3696, PETRI_PLACES=197, PETRI_TRANSITIONS=240} [2023-08-29 22:58:36,323 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 129 predicate places. [2023-08-29 22:58:36,323 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 240 transitions, 3696 flow [2023-08-29 22:58:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:36,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:36,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-29 22:58:36,331 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:58:36,530 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:58:36,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:36,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1486892958, now seen corresponding path program 2 times [2023-08-29 22:58:36,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:58:36,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503368032] [2023-08-29 22:58:36,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:58:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:58:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:58:36,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:58:36,535 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 (27)] Waiting until timeout for monitored process [2023-08-29 22:58:36,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:58:36,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:58:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:58:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:58:36,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:58:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:58:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:58:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:58:37,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:58:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503368032] [2023-08-29 22:58:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503368032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:58:37,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:58:37,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:58:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441428045] [2023-08-29 22:58:37,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:58:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 22:58:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:58:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 22:58:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-29 22:58:47,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 822 [2023-08-29 22:58:47,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 240 transitions, 3696 flow. Second operand has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:47,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:47,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 822 [2023-08-29 22:58:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:49,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:51,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:52,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:54,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:55,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:57,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:58:59,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:59:00,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:59:01,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:59:03,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:59:08,346 INFO L130 PetriNetUnfolder]: 4944/9751 cut-off events. [2023-08-29 22:59:08,346 INFO L131 PetriNetUnfolder]: For 16850/17359 co-relation queries the response was YES. [2023-08-29 22:59:08,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32482 conditions, 9751 events. 4944/9751 cut-off events. For 16850/17359 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 82773 event pairs, 3345 based on Foata normal form. 75/6559 useless extension candidates. Maximal degree in co-relation 32411. Up to 4190 conditions per place. [2023-08-29 22:59:08,418 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 227 selfloop transitions, 157 changer transitions 0/387 dead transitions. [2023-08-29 22:59:08,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 387 transitions, 6005 flow [2023-08-29 22:59:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:59:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:59:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5068 transitions. [2023-08-29 22:59:08,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110300081103001 [2023-08-29 22:59:08,424 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5068 transitions. [2023-08-29 22:59:08,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5068 transitions. [2023-08-29 22:59:08,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:08,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5068 transitions. [2023-08-29 22:59:08,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 337.8666666666667) internal successors, (5068), 15 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:08,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:08,433 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 822.0) internal successors, (13152), 16 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:08,433 INFO L175 Difference]: Start difference. First operand has 197 places, 240 transitions, 3696 flow. Second operand 15 states and 5068 transitions. [2023-08-29 22:59:08,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 387 transitions, 6005 flow [2023-08-29 22:59:08,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 387 transitions, 5961 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:59:08,467 INFO L231 Difference]: Finished difference. Result has 218 places, 289 transitions, 5278 flow [2023-08-29 22:59:08,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5278, PETRI_PLACES=218, PETRI_TRANSITIONS=289} [2023-08-29 22:59:08,468 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 150 predicate places. [2023-08-29 22:59:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 289 transitions, 5278 flow [2023-08-29 22:59:08,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 329.46666666666664) internal successors, (4942), 15 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:08,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:08,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:08,476 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 (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:59:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:08,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:08,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 85270872, now seen corresponding path program 1 times [2023-08-29 22:59:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371322607] [2023-08-29 22:59:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:59:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:08,678 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:08,680 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 (28)] Waiting until timeout for monitored process [2023-08-29 22:59:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:59:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:59:08,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:08,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:59:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:59:08,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:59:08,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:08,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371322607] [2023-08-29 22:59:08,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371322607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:59:08,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:59:08,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:59:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264611315] [2023-08-29 22:59:08,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:59:08,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:59:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:59:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:59:09,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-29 22:59:09,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 289 transitions, 5278 flow. Second operand has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:09,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:09,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-29 22:59:09,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:59:10,415 INFO L130 PetriNetUnfolder]: 3632/7387 cut-off events. [2023-08-29 22:59:10,415 INFO L131 PetriNetUnfolder]: For 15685/16057 co-relation queries the response was YES. [2023-08-29 22:59:10,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25741 conditions, 7387 events. 3632/7387 cut-off events. For 15685/16057 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 61367 event pairs, 1915 based on Foata normal form. 8/5498 useless extension candidates. Maximal degree in co-relation 25661. Up to 6725 conditions per place. [2023-08-29 22:59:10,465 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 233 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2023-08-29 22:59:10,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 283 transitions, 5794 flow [2023-08-29 22:59:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:59:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:59:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1373 transitions. [2023-08-29 22:59:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41757907542579076 [2023-08-29 22:59:10,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1373 transitions. [2023-08-29 22:59:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1373 transitions. [2023-08-29 22:59:10,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:10,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1373 transitions. [2023-08-29 22:59:10,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:10,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:10,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:10,470 INFO L175 Difference]: Start difference. First operand has 218 places, 289 transitions, 5278 flow. Second operand 4 states and 1373 transitions. [2023-08-29 22:59:10,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 283 transitions, 5794 flow [2023-08-29 22:59:10,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 283 transitions, 5430 flow, removed 103 selfloop flow, removed 4 redundant places. [2023-08-29 22:59:10,513 INFO L231 Difference]: Finished difference. Result has 215 places, 283 transitions, 4964 flow [2023-08-29 22:59:10,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4870, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4964, PETRI_PLACES=215, PETRI_TRANSITIONS=283} [2023-08-29 22:59:10,514 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2023-08-29 22:59:10,514 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 283 transitions, 4964 flow [2023-08-29 22:59:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:10,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:10,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:10,524 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 (28)] Forceful destruction successful, exit code 0 [2023-08-29 22:59:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:10,722 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:10,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 85270873, now seen corresponding path program 1 times [2023-08-29 22:59:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320559165] [2023-08-29 22:59:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:59:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:10,724 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:10,726 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 (29)] Waiting until timeout for monitored process [2023-08-29 22:59:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:59:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 22:59:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:10,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:59:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:59:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:59:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:59:11,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:11,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320559165] [2023-08-29 22:59:11,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320559165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:59:11,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:59:11,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:59:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889787995] [2023-08-29 22:59:11,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:59:11,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 22:59:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 22:59:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-08-29 22:59:17,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 822 [2023-08-29 22:59:17,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 283 transitions, 4964 flow. Second operand has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:17,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:17,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 822 [2023-08-29 22:59:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:59:20,871 INFO L130 PetriNetUnfolder]: 4142/8785 cut-off events. [2023-08-29 22:59:20,871 INFO L131 PetriNetUnfolder]: For 18829/19161 co-relation queries the response was YES. [2023-08-29 22:59:20,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28543 conditions, 8785 events. 4142/8785 cut-off events. For 18829/19161 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 78002 event pairs, 1751 based on Foata normal form. 0/6778 useless extension candidates. Maximal degree in co-relation 28463. Up to 4699 conditions per place. [2023-08-29 22:59:20,934 INFO L137 encePairwiseOnDemand]: 809/822 looper letters, 189 selfloop transitions, 141 changer transitions 0/333 dead transitions. [2023-08-29 22:59:20,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 333 transitions, 5888 flow [2023-08-29 22:59:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:59:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:59:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4060 transitions. [2023-08-29 22:59:20,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799363653378252 [2023-08-29 22:59:20,954 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4060 transitions. [2023-08-29 22:59:20,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4060 transitions. [2023-08-29 22:59:20,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:20,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4060 transitions. [2023-08-29 22:59:20,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 312.3076923076923) internal successors, (4060), 13 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:20,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 822.0) internal successors, (11508), 14 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:20,961 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 822.0) internal successors, (11508), 14 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:20,961 INFO L175 Difference]: Start difference. First operand has 215 places, 283 transitions, 4964 flow. Second operand 13 states and 4060 transitions. [2023-08-29 22:59:20,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 333 transitions, 5888 flow [2023-08-29 22:59:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 333 transitions, 5799 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:59:21,003 INFO L231 Difference]: Finished difference. Result has 228 places, 284 transitions, 5288 flow [2023-08-29 22:59:21,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5288, PETRI_PLACES=228, PETRI_TRANSITIONS=284} [2023-08-29 22:59:21,003 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 160 predicate places. [2023-08-29 22:59:21,003 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 284 transitions, 5288 flow [2023-08-29 22:59:21,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 307.73333333333335) internal successors, (4616), 15 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:21,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:21,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:21,012 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 (29)] Forceful destruction successful, exit code 0 [2023-08-29 22:59:21,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:21,207 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:21,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -543339933, now seen corresponding path program 2 times [2023-08-29 22:59:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:21,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778507542] [2023-08-29 22:59:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:59:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:21,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:21,209 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:21,211 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 (30)] Waiting until timeout for monitored process [2023-08-29 22:59:21,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:59:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:59:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:59:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:21,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:59:21,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-08-29 22:59:21,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:59:21,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:59:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:59:21,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:59:21,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:59:21,513 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:59:21,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:59:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:59:21,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:59:21,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:21,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778507542] [2023-08-29 22:59:21,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778507542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:59:21,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:59:21,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:59:21,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249162225] [2023-08-29 22:59:21,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:59:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:59:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:59:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:59:22,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-08-29 22:59:22,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 284 transitions, 5288 flow. Second operand has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:22,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:22,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-08-29 22:59:22,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:59:24,223 INFO L130 PetriNetUnfolder]: 3594/7293 cut-off events. [2023-08-29 22:59:24,224 INFO L131 PetriNetUnfolder]: For 30370/30654 co-relation queries the response was YES. [2023-08-29 22:59:24,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27541 conditions, 7293 events. 3594/7293 cut-off events. For 30370/30654 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59334 event pairs, 1851 based on Foata normal form. 224/6558 useless extension candidates. Maximal degree in co-relation 27457. Up to 7108 conditions per place. [2023-08-29 22:59:24,263 INFO L137 encePairwiseOnDemand]: 817/822 looper letters, 214 selfloop transitions, 65 changer transitions 0/281 dead transitions. [2023-08-29 22:59:24,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 281 transitions, 5818 flow [2023-08-29 22:59:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:59:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:59:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1636 transitions. [2023-08-29 22:59:24,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980535279805353 [2023-08-29 22:59:24,267 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1636 transitions. [2023-08-29 22:59:24,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1636 transitions. [2023-08-29 22:59:24,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:24,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1636 transitions. [2023-08-29 22:59:24,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 327.2) internal successors, (1636), 5 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:24,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:24,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 822.0) internal successors, (4932), 6 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:24,270 INFO L175 Difference]: Start difference. First operand has 228 places, 284 transitions, 5288 flow. Second operand 5 states and 1636 transitions. [2023-08-29 22:59:24,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 281 transitions, 5818 flow [2023-08-29 22:59:24,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 281 transitions, 5604 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-29 22:59:24,317 INFO L231 Difference]: Finished difference. Result has 217 places, 281 transitions, 5176 flow [2023-08-29 22:59:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5176, PETRI_PLACES=217, PETRI_TRANSITIONS=281} [2023-08-29 22:59:24,318 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 149 predicate places. [2023-08-29 22:59:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 281 transitions, 5176 flow [2023-08-29 22:59:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:24,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:24,319 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:24,326 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 (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:59:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:24,526 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:24,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1005020711, now seen corresponding path program 1 times [2023-08-29 22:59:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772952462] [2023-08-29 22:59:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:59:24,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:24,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:24,528 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:24,530 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 (31)] Waiting until timeout for monitored process [2023-08-29 22:59:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:59:24,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:59:24,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:24,702 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:59:24,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:59:24,831 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 13 treesize of output 9 [2023-08-29 22:59:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:59:24,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:59:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:59:25,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772952462] [2023-08-29 22:59:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772952462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:59:25,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:59:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-29 22:59:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328401774] [2023-08-29 22:59:25,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:59:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 22:59:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 22:59:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-29 22:59:34,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 822 [2023-08-29 22:59:34,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 281 transitions, 5176 flow. Second operand has 18 states, 18 states have (on average 313.27777777777777) internal successors, (5639), 18 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:34,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:34,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 822 [2023-08-29 22:59:34,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:59:38,008 INFO L130 PetriNetUnfolder]: 4883/10101 cut-off events. [2023-08-29 22:59:38,009 INFO L131 PetriNetUnfolder]: For 37221/37747 co-relation queries the response was YES. [2023-08-29 22:59:38,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37725 conditions, 10101 events. 4883/10101 cut-off events. For 37221/37747 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 86891 event pairs, 2572 based on Foata normal form. 25/8674 useless extension candidates. Maximal degree in co-relation 37645. Up to 4588 conditions per place. [2023-08-29 22:59:38,070 INFO L137 encePairwiseOnDemand]: 813/822 looper letters, 379 selfloop transitions, 74 changer transitions 0/455 dead transitions. [2023-08-29 22:59:38,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 455 transitions, 8446 flow [2023-08-29 22:59:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:59:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:59:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5414 transitions. [2023-08-29 22:59:38,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38743380563904395 [2023-08-29 22:59:38,075 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5414 transitions. [2023-08-29 22:59:38,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5414 transitions. [2023-08-29 22:59:38,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:38,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5414 transitions. [2023-08-29 22:59:38,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 318.47058823529414) internal successors, (5414), 17 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:38,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:38,084 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 822.0) internal successors, (14796), 18 states have internal predecessors, (14796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:38,084 INFO L175 Difference]: Start difference. First operand has 217 places, 281 transitions, 5176 flow. Second operand 17 states and 5414 transitions. [2023-08-29 22:59:38,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 455 transitions, 8446 flow [2023-08-29 22:59:38,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 455 transitions, 8339 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:59:38,144 INFO L231 Difference]: Finished difference. Result has 231 places, 294 transitions, 5647 flow [2023-08-29 22:59:38,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5647, PETRI_PLACES=231, PETRI_TRANSITIONS=294} [2023-08-29 22:59:38,145 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 163 predicate places. [2023-08-29 22:59:38,145 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 294 transitions, 5647 flow [2023-08-29 22:59:38,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 313.27777777777777) internal successors, (5639), 18 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:38,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:38,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:38,156 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 (31)] Forceful destruction successful, exit code 0 [2023-08-29 22:59:38,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:38,353 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:38,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1836338714, now seen corresponding path program 2 times [2023-08-29 22:59:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949494486] [2023-08-29 22:59:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:59:38,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:38,355 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:38,357 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 (32)] Waiting until timeout for monitored process [2023-08-29 22:59:38,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:59:38,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:59:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:59:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:38,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:59:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 22:59:38,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:59:38,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:38,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949494486] [2023-08-29 22:59:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949494486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:59:38,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:59:38,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:59:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860140684] [2023-08-29 22:59:38,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:59:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:59:38,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:59:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:59:39,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 822 [2023-08-29 22:59:39,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 294 transitions, 5647 flow. Second operand has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:39,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:39,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 822 [2023-08-29 22:59:39,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:59:40,570 INFO L130 PetriNetUnfolder]: 3022/6452 cut-off events. [2023-08-29 22:59:40,570 INFO L131 PetriNetUnfolder]: For 31521/32025 co-relation queries the response was YES. [2023-08-29 22:59:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24841 conditions, 6452 events. 3022/6452 cut-off events. For 31521/32025 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 52397 event pairs, 1623 based on Foata normal form. 640/6058 useless extension candidates. Maximal degree in co-relation 24760. Up to 5652 conditions per place. [2023-08-29 22:59:40,622 INFO L137 encePairwiseOnDemand]: 816/822 looper letters, 183 selfloop transitions, 104 changer transitions 0/289 dead transitions. [2023-08-29 22:59:40,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 289 transitions, 6180 flow [2023-08-29 22:59:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:59:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:59:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2038 transitions. [2023-08-29 22:59:40,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321978913219787 [2023-08-29 22:59:40,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2038 transitions. [2023-08-29 22:59:40,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2038 transitions. [2023-08-29 22:59:40,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:59:40,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2038 transitions. [2023-08-29 22:59:40,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.6666666666667) internal successors, (2038), 6 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:40,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:40,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 822.0) internal successors, (5754), 7 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:40,629 INFO L175 Difference]: Start difference. First operand has 231 places, 294 transitions, 5647 flow. Second operand 6 states and 2038 transitions. [2023-08-29 22:59:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 289 transitions, 6180 flow [2023-08-29 22:59:40,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 289 transitions, 5941 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-29 22:59:40,685 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 5575 flow [2023-08-29 22:59:40,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5575, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2023-08-29 22:59:40,686 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 155 predicate places. [2023-08-29 22:59:40,686 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 5575 flow [2023-08-29 22:59:40,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 336.1666666666667) internal successors, (2017), 6 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:40,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:59:40,687 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:59:40,694 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 (32)] Ended with exit code 0 [2023-08-29 22:59:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:40,894 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 22:59:40,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:59:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1876616425, now seen corresponding path program 3 times [2023-08-29 22:59:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:59:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856909806] [2023-08-29 22:59:40,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:59:40,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:59:40,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:59:40,895 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:59:40,896 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 (33)] Waiting until timeout for monitored process [2023-08-29 22:59:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:59:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:59:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 22:59:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:59:41,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:59:41,162 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 13 treesize of output 9 [2023-08-29 22:59:41,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:59:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-29 22:59:41,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:59:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 22:59:42,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:59:42,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856909806] [2023-08-29 22:59:42,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856909806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:59:42,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:59:42,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 10 [2023-08-29 22:59:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114106601] [2023-08-29 22:59:42,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:59:42,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:59:42,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:59:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:59:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:59:49,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 822 [2023-08-29 22:59:49,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 5575 flow. Second operand has 11 states, 11 states have (on average 315.90909090909093) internal successors, (3475), 11 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:59:49,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:59:49,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 822 [2023-08-29 22:59:49,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:00:11,307 WARN L222 SmtUtils]: Spent 18.80s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:00:19,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:00:20,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:00:21,885 INFO L130 PetriNetUnfolder]: 3022/6428 cut-off events. [2023-08-29 23:00:21,886 INFO L131 PetriNetUnfolder]: For 24275/24779 co-relation queries the response was YES. [2023-08-29 23:00:21,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24450 conditions, 6428 events. 3022/6428 cut-off events. For 24275/24779 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 51514 event pairs, 1703 based on Foata normal form. 24/5418 useless extension candidates. Maximal degree in co-relation 24372. Up to 3693 conditions per place. [2023-08-29 23:00:21,937 INFO L137 encePairwiseOnDemand]: 814/822 looper letters, 230 selfloop transitions, 102 changer transitions 0/334 dead transitions. [2023-08-29 23:00:21,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 334 transitions, 6295 flow [2023-08-29 23:00:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 23:00:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 23:00:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3203 transitions. [2023-08-29 23:00:21,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896593673965937 [2023-08-29 23:00:21,942 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3203 transitions. [2023-08-29 23:00:21,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3203 transitions. [2023-08-29 23:00:21,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:00:21,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3203 transitions. [2023-08-29 23:00:21,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 320.3) internal successors, (3203), 10 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:21,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:21,947 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 822.0) internal successors, (9042), 11 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:21,947 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 5575 flow. Second operand 10 states and 3203 transitions. [2023-08-29 23:00:21,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 334 transitions, 6295 flow [2023-08-29 23:00:21,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 334 transitions, 5472 flow, removed 16 selfloop flow, removed 24 redundant places. [2023-08-29 23:00:21,992 INFO L231 Difference]: Finished difference. Result has 200 places, 276 transitions, 4664 flow [2023-08-29 23:00:21,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4664, PETRI_PLACES=200, PETRI_TRANSITIONS=276} [2023-08-29 23:00:21,994 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 132 predicate places. [2023-08-29 23:00:21,994 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 276 transitions, 4664 flow [2023-08-29 23:00:21,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 315.90909090909093) internal successors, (3475), 11 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:21,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:00:21,995 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:00:22,002 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 (33)] Forceful destruction successful, exit code 0 [2023-08-29 23:00:22,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:22,203 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 23:00:22,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:00:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1723830135, now seen corresponding path program 2 times [2023-08-29 23:00:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:00:22,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738667190] [2023-08-29 23:00:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:00:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:00:22,204 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:00:22,205 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 (34)] Waiting until timeout for monitored process [2023-08-29 23:00:22,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:00:22,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:00:22,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:00:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:00:22,465 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:00:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:00:22,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:00:22,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:00:22,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:00:22,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:00:22,735 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:00:22,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:00:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 23:00:22,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:00:22,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:00:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738667190] [2023-08-29 23:00:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738667190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:00:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:00:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:00:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040637072] [2023-08-29 23:00:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:00:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:00:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:00:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:00:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:00:23,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-29 23:00:23,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 276 transitions, 4664 flow. Second operand has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:23,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:00:23,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-29 23:00:23,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:00:24,801 INFO L130 PetriNetUnfolder]: 2650/5478 cut-off events. [2023-08-29 23:00:24,801 INFO L131 PetriNetUnfolder]: For 17014/17302 co-relation queries the response was YES. [2023-08-29 23:00:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20506 conditions, 5478 events. 2650/5478 cut-off events. For 17014/17302 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 40920 event pairs, 1323 based on Foata normal form. 108/4926 useless extension candidates. Maximal degree in co-relation 20444. Up to 5399 conditions per place. [2023-08-29 23:00:24,830 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 249 selfloop transitions, 23 changer transitions 0/273 dead transitions. [2023-08-29 23:00:24,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 273 transitions, 5179 flow [2023-08-29 23:00:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:00:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:00:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-08-29 23:00:24,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41088807785888076 [2023-08-29 23:00:24,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-08-29 23:00:24,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-08-29 23:00:24,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:00:24,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-08-29 23:00:24,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:24,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:24,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:24,835 INFO L175 Difference]: Start difference. First operand has 200 places, 276 transitions, 4664 flow. Second operand 4 states and 1351 transitions. [2023-08-29 23:00:24,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 273 transitions, 5179 flow [2023-08-29 23:00:24,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 273 transitions, 5100 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:00:24,862 INFO L231 Difference]: Finished difference. Result has 195 places, 273 transitions, 4602 flow [2023-08-29 23:00:24,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4602, PETRI_PLACES=195, PETRI_TRANSITIONS=273} [2023-08-29 23:00:24,863 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 127 predicate places. [2023-08-29 23:00:24,863 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 273 transitions, 4602 flow [2023-08-29 23:00:24,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:24,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:00:24,863 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:00:24,870 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 (34)] Ended with exit code 0 [2023-08-29 23:00:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:25,070 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 23:00:25,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:00:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1723830134, now seen corresponding path program 2 times [2023-08-29 23:00:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:00:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783444797] [2023-08-29 23:00:25,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:00:25,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:25,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:00:25,072 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:00:25,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-29 23:00:25,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:00:25,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:00:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:00:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:00:25,404 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:00:25,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:00:25,564 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:00:25,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:00:25,922 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:00:25,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:00:25,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:00:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:00:26,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:00:26,185 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:00:26,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:00:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:00:26,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 23:00:26,342 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:00:26,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:00:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 23:00:26,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:00:26,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:00:26,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783444797] [2023-08-29 23:00:26,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783444797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:00:26,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:00:26,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:00:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903143239] [2023-08-29 23:00:26,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:00:26,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:00:26,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:00:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:00:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:00:28,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 822 [2023-08-29 23:00:28,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 273 transitions, 4602 flow. Second operand has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:28,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:00:28,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 822 [2023-08-29 23:00:28,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:00:30,063 INFO L130 PetriNetUnfolder]: 2350/4672 cut-off events. [2023-08-29 23:00:30,063 INFO L131 PetriNetUnfolder]: For 16418/16418 co-relation queries the response was YES. [2023-08-29 23:00:30,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17971 conditions, 4672 events. 2350/4672 cut-off events. For 16418/16418 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 32410 event pairs, 1095 based on Foata normal form. 108/4296 useless extension candidates. Maximal degree in co-relation 17908. Up to 4647 conditions per place. [2023-08-29 23:00:30,102 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 247 selfloop transitions, 23 changer transitions 0/270 dead transitions. [2023-08-29 23:00:30,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 270 transitions, 5113 flow [2023-08-29 23:00:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:00:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:00:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1310 transitions. [2023-08-29 23:00:30,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984184914841849 [2023-08-29 23:00:30,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1310 transitions. [2023-08-29 23:00:30,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1310 transitions. [2023-08-29 23:00:30,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:00:30,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1310 transitions. [2023-08-29 23:00:30,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:30,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:30,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 822.0) internal successors, (4110), 5 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:30,108 INFO L175 Difference]: Start difference. First operand has 195 places, 273 transitions, 4602 flow. Second operand 4 states and 1310 transitions. [2023-08-29 23:00:30,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 270 transitions, 5113 flow [2023-08-29 23:00:30,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 270 transitions, 5071 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:00:30,140 INFO L231 Difference]: Finished difference. Result has 192 places, 270 transitions, 4577 flow [2023-08-29 23:00:30,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4577, PETRI_PLACES=192, PETRI_TRANSITIONS=270} [2023-08-29 23:00:30,141 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 124 predicate places. [2023-08-29 23:00:30,141 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 270 transitions, 4577 flow [2023-08-29 23:00:30,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:00:30,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:00:30,141 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1] [2023-08-29 23:00:30,148 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 (35)] Ended with exit code 0 [2023-08-29 23:00:30,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:30,345 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 23:00:30,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:00:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1075766526, now seen corresponding path program 1 times [2023-08-29 23:00:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:00:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425683018] [2023-08-29 23:00:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:00:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:00:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:00:30,347 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:00:30,349 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 (36)] Waiting until timeout for monitored process [2023-08-29 23:00:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:00:30,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-29 23:00:30,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:00:30,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 23:00:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:00:32,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:00:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:00:40,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:00:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425683018] [2023-08-29 23:00:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425683018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:00:40,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:00:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-08-29 23:00:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527037469] [2023-08-29 23:00:40,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:00:40,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-29 23:00:40,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:00:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-29 23:00:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2023-08-29 23:02:55,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 822 [2023-08-29 23:02:55,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 270 transitions, 4577 flow. Second operand has 32 states, 32 states have (on average 331.0625) internal successors, (10594), 32 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:02:55,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:02:55,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 822 [2023-08-29 23:02:55,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:03:09,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:11,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:13,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:15,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:17,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:19,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:21,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:22,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:24,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:26,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:28,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:30,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:32,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:03:34,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:04:09,217 INFO L130 PetriNetUnfolder]: 2445/4872 cut-off events. [2023-08-29 23:04:09,217 INFO L131 PetriNetUnfolder]: For 27019/27019 co-relation queries the response was YES. [2023-08-29 23:04:09,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19833 conditions, 4872 events. 2445/4872 cut-off events. For 27019/27019 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 33838 event pairs, 1095 based on Foata normal form. 64/4452 useless extension candidates. Maximal degree in co-relation 19772. Up to 4356 conditions per place. [2023-08-29 23:04:09,252 INFO L137 encePairwiseOnDemand]: 815/822 looper letters, 106 selfloop transitions, 282 changer transitions 0/388 dead transitions. [2023-08-29 23:04:09,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 388 transitions, 7912 flow [2023-08-29 23:04:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 23:04:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 23:04:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 10700 transitions. [2023-08-29 23:04:09,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067822384428224 [2023-08-29 23:04:09,259 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 10700 transitions. [2023-08-29 23:04:09,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 10700 transitions. [2023-08-29 23:04:09,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:04:09,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 10700 transitions. [2023-08-29 23:04:09,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 334.375) internal successors, (10700), 32 states have internal predecessors, (10700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:09,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 822.0) internal successors, (27126), 33 states have internal predecessors, (27126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:09,281 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 822.0) internal successors, (27126), 33 states have internal predecessors, (27126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:09,281 INFO L175 Difference]: Start difference. First operand has 192 places, 270 transitions, 4577 flow. Second operand 32 states and 10700 transitions. [2023-08-29 23:04:09,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 388 transitions, 7912 flow [2023-08-29 23:04:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 388 transitions, 7888 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:04:09,324 INFO L231 Difference]: Finished difference. Result has 237 places, 365 transitions, 7953 flow [2023-08-29 23:04:09,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7953, PETRI_PLACES=237, PETRI_TRANSITIONS=365} [2023-08-29 23:04:09,325 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 169 predicate places. [2023-08-29 23:04:09,325 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 365 transitions, 7953 flow [2023-08-29 23:04:09,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 331.0625) internal successors, (10594), 32 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:09,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:04:09,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:04:09,337 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 (36)] Forceful destruction successful, exit code 0 [2023-08-29 23:04:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:04:09,534 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 23:04:09,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:04:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1941554760, now seen corresponding path program 1 times [2023-08-29 23:04:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:04:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77008025] [2023-08-29 23:04:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:04:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:04:09,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:04:09,537 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:04:09,538 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 (37)] Waiting until timeout for monitored process [2023-08-29 23:04:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:04:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 23:04:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:04:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 23:04:09,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:04:09,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:04:09,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77008025] [2023-08-29 23:04:09,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77008025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:04:09,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:04:09,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:04:09,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832101924] [2023-08-29 23:04:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:04:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:04:09,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:04:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:04:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:04:09,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 822 [2023-08-29 23:04:09,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 365 transitions, 7953 flow. Second operand has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:09,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:04:09,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 822 [2023-08-29 23:04:09,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:04:11,101 INFO L130 PetriNetUnfolder]: 2379/4880 cut-off events. [2023-08-29 23:04:11,101 INFO L131 PetriNetUnfolder]: For 25342/25342 co-relation queries the response was YES. [2023-08-29 23:04:11,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20758 conditions, 4880 events. 2379/4880 cut-off events. For 25342/25342 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 35031 event pairs, 799 based on Foata normal form. 0/4508 useless extension candidates. Maximal degree in co-relation 20681. Up to 3811 conditions per place. [2023-08-29 23:04:11,148 INFO L137 encePairwiseOnDemand]: 818/822 looper letters, 368 selfloop transitions, 3 changer transitions 0/371 dead transitions. [2023-08-29 23:04:11,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 371 transitions, 8725 flow [2023-08-29 23:04:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:04:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:04:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2023-08-29 23:04:11,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310624493106245 [2023-08-29 23:04:11,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2023-08-29 23:04:11,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2023-08-29 23:04:11,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:04:11,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2023-08-29 23:04:11,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:11,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:11,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 822.0) internal successors, (3288), 4 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:11,154 INFO L175 Difference]: Start difference. First operand has 237 places, 365 transitions, 7953 flow. Second operand 3 states and 1063 transitions. [2023-08-29 23:04:11,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 371 transitions, 8725 flow [2023-08-29 23:04:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 371 transitions, 8407 flow, removed 107 selfloop flow, removed 9 redundant places. [2023-08-29 23:04:11,231 INFO L231 Difference]: Finished difference. Result has 232 places, 366 transitions, 7653 flow [2023-08-29 23:04:11,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=822, PETRI_DIFFERENCE_MINUEND_FLOW=7635, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7653, PETRI_PLACES=232, PETRI_TRANSITIONS=366} [2023-08-29 23:04:11,232 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 164 predicate places. [2023-08-29 23:04:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 366 transitions, 7653 flow [2023-08-29 23:04:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:04:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:04:11,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:04:11,240 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 (37)] Forceful destruction successful, exit code 0 [2023-08-29 23:04:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:04:11,436 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-29 23:04:11,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:04:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 136891066, now seen corresponding path program 1 times [2023-08-29 23:04:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:04:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470366488] [2023-08-29 23:04:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:04:11,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:04:11,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:04:11,438 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:04:11,440 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 (38)] Waiting until timeout for monitored process [2023-08-29 23:04:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:04:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:04:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:04:12,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:04:12,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 77 [2023-08-29 23:04:12,940 INFO L321 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2023-08-29 23:04:12,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 21 [2023-08-29 23:04:24,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:04:24,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 159 [2023-08-29 23:04:24,505 INFO L321 Elim1Store]: treesize reduction 30, result has 50.8 percent of original size [2023-08-29 23:04:24,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 129 Killed by 15