./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:15:53,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:15:53,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:15:53,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:15:53,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:15:53,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:15:53,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:15:53,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:15:53,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:15:53,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:15:53,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:15:53,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:15:53,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:15:53,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:15:53,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:15:53,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:15:53,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:15:53,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:15:53,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:15:53,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:15:53,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:15:53,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:15:53,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:15:53,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:15:53,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:15:53,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:15:53,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:15:53,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:15:53,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:15:53,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:15:53,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:15:53,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:15:53,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:15:53,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:15:53,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:15:53,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:15:53,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:15:53,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:15:53,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:15:53,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:15:53,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:15:53,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:15:53,569 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:15:53,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:15:53,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:15:53,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:15:53,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:15:53,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:15:53,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:15:53,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:15:53,573 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:15:53,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:15:53,574 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:15:53,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:15:53,575 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:15:53,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:15:53,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:15:53,576 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:15:53,576 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:15:53,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:15:53,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:15:53,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:15:53,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:15:53,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:15:53,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:15:53,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:15:53,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:15:53,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:15:53,578 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:15:53,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:15:53,578 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:15:53,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:15:53,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:15:53,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:15:53,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:15:53,878 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:15:53,878 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:15:53,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 03:15:55,003 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:15:55,180 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:15:55,181 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 03:15:55,195 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22f1b587/980365d4d60a4d429d823516f13954d9/FLAGead6b82e8 [2023-09-01 03:15:55,214 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22f1b587/980365d4d60a4d429d823516f13954d9 [2023-09-01 03:15:55,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:15:55,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:15:55,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:15:55,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:15:55,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:15:55,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:15:55" (1/1) ... [2023-09-01 03:15:55,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e15c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:55, skipping insertion in model container [2023-09-01 03:15:55,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:15:55" (1/1) ... [2023-09-01 03:15:55,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:15:55,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:15:55,427 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 03:15:55,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:15:55,449 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:15:55,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@607baf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:55, skipping insertion in model container [2023-09-01 03:15:55,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:15:55,451 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:15:55,452 INFO L158 Benchmark]: Toolchain (without parser) took 233.01ms. Allocated memory is still 81.8MB. Free memory was 57.3MB in the beginning and 47.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:15:55,453 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 39.0MB in the end (delta: 41.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:15:55,454 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.76ms. Allocated memory is still 81.8MB. Free memory was 57.2MB in the beginning and 47.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:15:55,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 39.0MB in the end (delta: 41.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.76ms. Allocated memory is still 81.8MB. Free memory was 57.2MB in the beginning and 47.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:15:57,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:15:57,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:15:57,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:15:57,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:15:57,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:15:57,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:15:57,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:15:57,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:15:57,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:15:57,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:15:57,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:15:57,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:15:57,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:15:57,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:15:57,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:15:57,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:15:57,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:15:57,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:15:57,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:15:57,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:15:57,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:15:57,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:15:57,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:15:57,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:15:57,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:15:57,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:15:57,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:15:57,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:15:57,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:15:57,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:15:57,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:15:57,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:15:57,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:15:57,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:15:57,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:15:57,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:15:57,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:15:57,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:15:57,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:15:57,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:15:57,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:15:57,541 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:15:57,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:15:57,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:15:57,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:15:57,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:15:57,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:15:57,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:15:57,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:15:57,542 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:15:57,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:15:57,543 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:15:57,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:15:57,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:15:57,544 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:15:57,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:15:57,545 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:15:57,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:15:57,545 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:15:57,545 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:15:57,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:15:57,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:15:57,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:15:57,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:15:57,887 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:15:57,887 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:15:57,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 03:15:59,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:15:59,219 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:15:59,220 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 03:15:59,233 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2312c146e/f17354545e524ba8b530f9b702c5d5c6/FLAG830e19c31 [2023-09-01 03:15:59,253 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2312c146e/f17354545e524ba8b530f9b702c5d5c6 [2023-09-01 03:15:59,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:15:59,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:15:59,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:15:59,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:15:59,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:15:59,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10959c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59, skipping insertion in model container [2023-09-01 03:15:59,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:15:59,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:15:59,404 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 03:15:59,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:15:59,418 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:15:59,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:15:59,451 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 03:15:59,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:15:59,457 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:15:59,483 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 03:15:59,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:15:59,504 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:15:59,507 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:15:59,513 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:15:59,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59 WrapperNode [2023-09-01 03:15:59,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:15:59,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:15:59,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:15:59,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:15:59,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,590 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2023-09-01 03:15:59,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:15:59,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:15:59,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:15:59,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:15:59,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:15:59,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:15:59,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:15:59,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:15:59,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (1/1) ... [2023-09-01 03:15:59,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:15:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:15:59,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:15:59,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:15:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:15:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:15:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:15:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:15:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:15:59,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:15:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:15:59,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:15:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:15:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:15:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:15:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:15:59,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:15:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:15:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:15:59,756 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:15:59,852 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:15:59,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:16:00,333 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:16:00,452 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:16:00,452 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:16:00,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:16:00 BoogieIcfgContainer [2023-09-01 03:16:00,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:16:00,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:16:00,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:16:00,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:16:00,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:15:59" (1/3) ... [2023-09-01 03:16:00,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6d01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:16:00, skipping insertion in model container [2023-09-01 03:16:00,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:15:59" (2/3) ... [2023-09-01 03:16:00,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6d01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:16:00, skipping insertion in model container [2023-09-01 03:16:00,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:16:00" (3/3) ... [2023-09-01 03:16:00,466 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-09-01 03:16:00,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:16:00,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 03:16:00,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:16:00,574 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:16:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 418 flow [2023-09-01 03:16:00,666 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-09-01 03:16:00,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:16:00,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-09-01 03:16:00,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 418 flow [2023-09-01 03:16:00,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 195 transitions, 402 flow [2023-09-01 03:16:00,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:16:00,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 195 transitions, 402 flow [2023-09-01 03:16:00,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 195 transitions, 402 flow [2023-09-01 03:16:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 195 transitions, 402 flow [2023-09-01 03:16:00,736 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-09-01 03:16:00,737 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:16:00,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 15/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-09-01 03:16:00,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-09-01 03:16:17,206 INFO L134 LiptonReduction]: Checked pairs total: 3331 [2023-09-01 03:16:17,206 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-09-01 03:16:17,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:16:17,232 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;@2c422e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:16:17,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-09-01 03:16:17,234 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:16:17,234 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:16:17,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:17,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:16:17,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:17,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 26589, now seen corresponding path program 1 times [2023-09-01 03:16:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28378369] [2023-09-01 03:16:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:17,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:17,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:17,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:17,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:16:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:16:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:17,458 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:16:17,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:16:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:17,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:17,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28378369] [2023-09-01 03:16:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28378369] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:17,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:16:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073082862] [2023-09-01 03:16:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:17,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:16:17,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:16:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:16:17,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-09-01 03:16:17,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:17,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:17,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-09-01 03:16:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:18,055 INFO L130 PetriNetUnfolder]: 436/746 cut-off events. [2023-09-01 03:16:18,056 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 03:16:18,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 746 events. 436/746 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4120 event pairs, 378 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 1382. Up to 726 conditions per place. [2023-09-01 03:16:18,064 INFO L137 encePairwiseOnDemand]: 401/413 looper letters, 46 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-09-01 03:16:18,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 216 flow [2023-09-01 03:16:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-09-01 03:16:18,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45117029862792574 [2023-09-01 03:16:18,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-09-01 03:16:18,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-09-01 03:16:18,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:18,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-09-01 03:16:18,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,103 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 108 flow. Second operand 3 states and 559 transitions. [2023-09-01 03:16:18,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 216 flow [2023-09-01 03:16:18,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:16:18,108 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 132 flow [2023-09-01 03:16:18,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-09-01 03:16:18,112 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-09-01 03:16:18,112 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 132 flow [2023-09-01 03:16:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:18,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:16:18,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:18,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:18,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash 26588, now seen corresponding path program 1 times [2023-09-01 03:16:18,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:18,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891651446] [2023-09-01 03:16:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:18,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:18,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:16:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:16:18,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:18,439 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:16:18,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:16:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:18,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:18,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891651446] [2023-09-01 03:16:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891651446] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:18,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:18,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:16:18,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117932337] [2023-09-01 03:16:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:18,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:16:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:16:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:16:18,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-09-01 03:16:18,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:18,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-09-01 03:16:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:18,747 INFO L130 PetriNetUnfolder]: 436/740 cut-off events. [2023-09-01 03:16:18,748 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:16:18,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 740 events. 436/740 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4122 event pairs, 378 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 1467. Up to 726 conditions per place. [2023-09-01 03:16:18,753 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-09-01 03:16:18,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 212 flow [2023-09-01 03:16:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-09-01 03:16:18,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390637610976594 [2023-09-01 03:16:18,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-09-01 03:16:18,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-09-01 03:16:18,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:18,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-09-01 03:16:18,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,760 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 132 flow. Second operand 3 states and 544 transitions. [2023-09-01 03:16:18,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 212 flow [2023-09-01 03:16:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:16:18,762 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-09-01 03:16:18,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-09-01 03:16:18,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-09-01 03:16:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-09-01 03:16:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:16:18,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:18,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:18,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 827133, now seen corresponding path program 1 times [2023-09-01 03:16:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962593964] [2023-09-01 03:16:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:18,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:18,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:18,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:16:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:16:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:19,055 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 [2023-09-01 03:16:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:19,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:19,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962593964] [2023-09-01 03:16:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962593964] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347093767] [2023-09-01 03:16:19,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:19,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:16:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:16:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:16:19,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-09-01 03:16:19,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:19,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:19,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-09-01 03:16:19,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:19,391 INFO L130 PetriNetUnfolder]: 436/738 cut-off events. [2023-09-01 03:16:19,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:16:19,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 738 events. 436/738 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4090 event pairs, 378 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 1483. Up to 720 conditions per place. [2023-09-01 03:16:19,394 INFO L137 encePairwiseOnDemand]: 411/413 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 03:16:19,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-09-01 03:16:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-09-01 03:16:19,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43664245359160614 [2023-09-01 03:16:19,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-09-01 03:16:19,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-09-01 03:16:19,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:19,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-09-01 03:16:19,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:19,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:19,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:19,400 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 541 transitions. [2023-09-01 03:16:19,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-09-01 03:16:19,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:19,402 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 121 flow [2023-09-01 03:16:19,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-09-01 03:16:19,402 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-09-01 03:16:19,403 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 121 flow [2023-09-01 03:16:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:19,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:16:19,427 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 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:19,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:19,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 826017, now seen corresponding path program 1 times [2023-09-01 03:16:19,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:19,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035800849] [2023-09-01 03:16:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:19,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:19,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:16:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:16:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:19,716 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:16:19,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:16:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:19,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:19,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035800849] [2023-09-01 03:16:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035800849] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:19,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:19,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:16:19,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177368184] [2023-09-01 03:16:19,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:19,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:16:19,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:16:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:16:20,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-09-01 03:16:20,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:20,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:20,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-09-01 03:16:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:21,596 INFO L130 PetriNetUnfolder]: 878/1482 cut-off events. [2023-09-01 03:16:21,598 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:16:21,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1482 events. 878/1482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 9383 event pairs, 756 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 2992. Up to 723 conditions per place. [2023-09-01 03:16:21,604 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 71 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2023-09-01 03:16:21,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 443 flow [2023-09-01 03:16:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:16:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:16:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-09-01 03:16:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188861985472155 [2023-09-01 03:16:21,608 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-09-01 03:16:21,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-09-01 03:16:21,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:21,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-09-01 03:16:21,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:21,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:21,617 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:21,617 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 121 flow. Second operand 6 states and 1038 transitions. [2023-09-01 03:16:21,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 443 flow [2023-09-01 03:16:21,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:21,621 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 279 flow [2023-09-01 03:16:21,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-09-01 03:16:21,623 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-09-01 03:16:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 279 flow [2023-09-01 03:16:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:16:21,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:21,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:21,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:21,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:21,832 INFO L85 PathProgramCache]: Analyzing trace with hash 25640801, now seen corresponding path program 1 times [2023-09-01 03:16:21,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:21,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257563226] [2023-09-01 03:16:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:21,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:21,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:21,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:16:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:16:21,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:21,959 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:16:21,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:16:21,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 03:16:22,071 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 03:16:22,072 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 [2023-09-01 03:16:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:22,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:22,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257563226] [2023-09-01 03:16:22,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257563226] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:22,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:22,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971104755] [2023-09-01 03:16:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:22,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:22,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:22,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-09-01 03:16:22,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:22,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:22,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-09-01 03:16:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:22,883 INFO L130 PetriNetUnfolder]: 876/1478 cut-off events. [2023-09-01 03:16:22,883 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 03:16:22,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1478 events. 876/1478 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 9370 event pairs, 756 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 3026. Up to 1443 conditions per place. [2023-09-01 03:16:22,890 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 48 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-09-01 03:16:22,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 363 flow [2023-09-01 03:16:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:16:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:16:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-09-01 03:16:22,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279661016949153 [2023-09-01 03:16:22,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-09-01 03:16:22,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-09-01 03:16:22,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:22,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-09-01 03:16:22,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:22,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:22,898 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:22,898 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 279 flow. Second operand 4 states and 707 transitions. [2023-09-01 03:16:22,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 363 flow [2023-09-01 03:16:22,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 348 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:22,904 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 252 flow [2023-09-01 03:16:22,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-09-01 03:16:22,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-09-01 03:16:22,906 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 252 flow [2023-09-01 03:16:22,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:22,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:22,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:16:22,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:23,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 25640802, now seen corresponding path program 1 times [2023-09-01 03:16:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091891471] [2023-09-01 03:16:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:23,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:23,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:16:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:16:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:23,246 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 03:16:23,247 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 [2023-09-01 03:16:23,287 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:16:23,287 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 [2023-09-01 03:16:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:23,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:23,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091891471] [2023-09-01 03:16:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091891471] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:23,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:16:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182878956] [2023-09-01 03:16:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:23,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:16:23,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:16:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:16:23,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 413 [2023-09-01 03:16:23,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:23,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 413 [2023-09-01 03:16:23,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:23,652 INFO L130 PetriNetUnfolder]: 666/1156 cut-off events. [2023-09-01 03:16:23,653 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:16:23,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1156 events. 666/1156 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 7070 event pairs, 568 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2368. Up to 1128 conditions per place. [2023-09-01 03:16:23,658 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 49 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 03:16:23,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 328 flow [2023-09-01 03:16:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-09-01 03:16:23,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44229217110573044 [2023-09-01 03:16:23,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-09-01 03:16:23,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-09-01 03:16:23,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:23,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-09-01 03:16:23,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,666 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 252 flow. Second operand 3 states and 548 transitions. [2023-09-01 03:16:23,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 328 flow [2023-09-01 03:16:23,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:16:23,670 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 223 flow [2023-09-01 03:16:23,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-09-01 03:16:23,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-09-01 03:16:23,673 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 223 flow [2023-09-01 03:16:23,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:23,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:23,675 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:16:23,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:23,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:23,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1160185635, now seen corresponding path program 2 times [2023-09-01 03:16:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:23,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079913947] [2023-09-01 03:16:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:16:23,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:23,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:23,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:23,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:16:23,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:16:23,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:16:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:16:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:24,029 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:16:24,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:16:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:24,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:24,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079913947] [2023-09-01 03:16:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079913947] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:24,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:24,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:16:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893523043] [2023-09-01 03:16:24,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:24,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:16:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:24,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:16:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:16:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-09-01 03:16:27,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:27,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:27,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-09-01 03:16:27,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:30,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:32,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:34,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:37,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:38,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:16:42,070 INFO L130 PetriNetUnfolder]: 2646/4583 cut-off events. [2023-09-01 03:16:42,070 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 03:16:42,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 4583 events. 2646/4583 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33496 event pairs, 2272 based on Foata normal form. 11/1781 useless extension candidates. Maximal degree in co-relation 9280. Up to 557 conditions per place. [2023-09-01 03:16:42,091 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 244 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2023-09-01 03:16:42,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 281 transitions, 1401 flow [2023-09-01 03:16:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:16:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:16:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2675 transitions. [2023-09-01 03:16:42,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317998385794996 [2023-09-01 03:16:42,104 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2675 transitions. [2023-09-01 03:16:42,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2675 transitions. [2023-09-01 03:16:42,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:42,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2675 transitions. [2023-09-01 03:16:42,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.33333333333334) internal successors, (2675), 15 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:42,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:42,120 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:42,121 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 223 flow. Second operand 15 states and 2675 transitions. [2023-09-01 03:16:42,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 281 transitions, 1401 flow [2023-09-01 03:16:42,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 281 transitions, 1400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:42,125 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 526 flow [2023-09-01 03:16:42,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=526, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-09-01 03:16:42,126 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2023-09-01 03:16:42,126 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 526 flow [2023-09-01 03:16:42,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:42,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:42,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:42,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:42,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:42,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:42,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971168, now seen corresponding path program 1 times [2023-09-01 03:16:42,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:42,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106053147] [2023-09-01 03:16:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:42,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:42,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:42,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:16:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:16:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:42,469 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-09-01 03:16:42,469 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 [2023-09-01 03:16:42,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-09-01 03:16:42,543 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 03:16:42,544 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 [2023-09-01 03:16:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:16:43,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106053147] [2023-09-01 03:16:43,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106053147] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:43,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:43,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-09-01 03:16:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711453486] [2023-09-01 03:16:43,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:43,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:16:43,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:16:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:16:44,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-09-01 03:16:44,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:44,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:44,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-09-01 03:16:44,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:45,558 INFO L130 PetriNetUnfolder]: 2518/4327 cut-off events. [2023-09-01 03:16:45,558 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 03:16:45,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4327 events. 2518/4327 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31554 event pairs, 2160 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 8842. Up to 3668 conditions per place. [2023-09-01 03:16:45,584 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 83 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2023-09-01 03:16:45,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 788 flow [2023-09-01 03:16:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:16:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:16:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1312 transitions. [2023-09-01 03:16:45,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39709443099273606 [2023-09-01 03:16:45,590 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1312 transitions. [2023-09-01 03:16:45,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1312 transitions. [2023-09-01 03:16:45,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:45,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1312 transitions. [2023-09-01 03:16:45,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:45,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:45,600 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:45,600 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 526 flow. Second operand 8 states and 1312 transitions. [2023-09-01 03:16:45,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 788 flow [2023-09-01 03:16:45,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 702 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-09-01 03:16:45,605 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 483 flow [2023-09-01 03:16:45,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=483, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-09-01 03:16:45,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-09-01 03:16:45,606 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 483 flow [2023-09-01 03:16:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:45,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:45,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:45,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:45,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:45,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:45,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971167, now seen corresponding path program 1 times [2023-09-01 03:16:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:45,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104133137] [2023-09-01 03:16:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:45,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:45,820 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:45,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:16:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:16:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:45,959 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 03:16:45,959 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 [2023-09-01 03:16:45,979 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:16:45,980 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 [2023-09-01 03:16:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:46,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:46,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:46,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104133137] [2023-09-01 03:16:46,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104133137] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:46,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:16:46,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256026124] [2023-09-01 03:16:46,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:46,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:16:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:16:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:16:46,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-09-01 03:16:46,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:46,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:46,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-09-01 03:16:46,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:46,613 INFO L130 PetriNetUnfolder]: 2390/4071 cut-off events. [2023-09-01 03:16:46,613 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2023-09-01 03:16:46,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8325 conditions, 4071 events. 2390/4071 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 29081 event pairs, 2048 based on Foata normal form. 0/1679 useless extension candidates. Maximal degree in co-relation 8300. Up to 3959 conditions per place. [2023-09-01 03:16:46,631 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 70 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-09-01 03:16:46,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 621 flow [2023-09-01 03:16:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-09-01 03:16:46,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43422114608555284 [2023-09-01 03:16:46,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-09-01 03:16:46,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-09-01 03:16:46,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:46,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-09-01 03:16:46,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:46,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:46,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:46,637 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 483 flow. Second operand 3 states and 538 transitions. [2023-09-01 03:16:46,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 621 flow [2023-09-01 03:16:46,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 584 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 03:16:46,640 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 444 flow [2023-09-01 03:16:46,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-09-01 03:16:46,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-09-01 03:16:46,641 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 444 flow [2023-09-01 03:16:46,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:46,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:46,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:46,650 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 (10)] Ended with exit code 0 [2023-09-01 03:16:46,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:46,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:46,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971283, now seen corresponding path program 1 times [2023-09-01 03:16:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500362875] [2023-09-01 03:16:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:46,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:46,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:46,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:46,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:16:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:16:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:46,930 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 [2023-09-01 03:16:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:46,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:46,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500362875] [2023-09-01 03:16:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500362875] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:46,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:46,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:16:46,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541778046] [2023-09-01 03:16:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:46,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:46,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:47,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-09-01 03:16:47,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 444 flow. Second operand has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:47,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:47,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-09-01 03:16:47,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:47,490 INFO L130 PetriNetUnfolder]: 1998/3399 cut-off events. [2023-09-01 03:16:47,490 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-09-01 03:16:47,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 3399 events. 1998/3399 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23269 event pairs, 1664 based on Foata normal form. 0/1511 useless extension candidates. Maximal degree in co-relation 6935. Up to 3266 conditions per place. [2023-09-01 03:16:47,504 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 58 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2023-09-01 03:16:47,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 578 flow [2023-09-01 03:16:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:16:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:16:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-09-01 03:16:47,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043583535108959 [2023-09-01 03:16:47,507 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-09-01 03:16:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-09-01 03:16:47,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:47,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-09-01 03:16:47,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:47,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:47,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:47,511 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 444 flow. Second operand 4 states and 668 transitions. [2023-09-01 03:16:47,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 578 flow [2023-09-01 03:16:47,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:47,514 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 461 flow [2023-09-01 03:16:47,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-09-01 03:16:47,515 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-09-01 03:16:47,515 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 461 flow [2023-09-01 03:16:47,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:47,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:47,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:47,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:47,724 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:47,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971282, now seen corresponding path program 1 times [2023-09-01 03:16:47,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:47,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470447954] [2023-09-01 03:16:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:47,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:47,727 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:16:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:16:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:47,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:47,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470447954] [2023-09-01 03:16:47,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470447954] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:47,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:16:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207827619] [2023-09-01 03:16:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:47,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:16:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:16:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:16:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-09-01 03:16:48,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:48,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:48,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-09-01 03:16:48,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:48,833 INFO L130 PetriNetUnfolder]: 3534/5975 cut-off events. [2023-09-01 03:16:48,833 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-09-01 03:16:48,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 5975 events. 3534/5975 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 44824 event pairs, 1280 based on Foata normal form. 0/2719 useless extension candidates. Maximal degree in co-relation 12169. Up to 3521 conditions per place. [2023-09-01 03:16:48,858 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 76 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2023-09-01 03:16:48,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 682 flow [2023-09-01 03:16:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:16:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:16:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-09-01 03:16:48,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43099273607748184 [2023-09-01 03:16:48,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-09-01 03:16:48,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-09-01 03:16:48,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:48,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-09-01 03:16:48,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:48,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:48,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:48,865 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 461 flow. Second operand 4 states and 712 transitions. [2023-09-01 03:16:48,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 682 flow [2023-09-01 03:16:48,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 670 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:16:48,868 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 499 flow [2023-09-01 03:16:48,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-09-01 03:16:48,868 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-09-01 03:16:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 499 flow [2023-09-01 03:16:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:48,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:48,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:48,882 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 [2023-09-01 03:16:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:49,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:49,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971162, now seen corresponding path program 1 times [2023-09-01 03:16:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932471694] [2023-09-01 03:16:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:49,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:49,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:16:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:16:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:49,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:49,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932471694] [2023-09-01 03:16:49,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932471694] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:49,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:49,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:49,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206174320] [2023-09-01 03:16:49,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:49,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-09-01 03:16:49,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 499 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:49,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:49,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-09-01 03:16:49,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:50,055 INFO L130 PetriNetUnfolder]: 4080/7110 cut-off events. [2023-09-01 03:16:50,055 INFO L131 PetriNetUnfolder]: For 751/751 co-relation queries the response was YES. [2023-09-01 03:16:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15949 conditions, 7110 events. 4080/7110 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 56541 event pairs, 3552 based on Foata normal form. 128/4150 useless extension candidates. Maximal degree in co-relation 15922. Up to 5894 conditions per place. [2023-09-01 03:16:50,093 INFO L137 encePairwiseOnDemand]: 403/413 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-09-01 03:16:50,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 967 flow [2023-09-01 03:16:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:16:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:16:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-09-01 03:16:50,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43825665859564167 [2023-09-01 03:16:50,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-09-01 03:16:50,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-09-01 03:16:50,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:50,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-09-01 03:16:50,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:50,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:50,101 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:50,101 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 499 flow. Second operand 4 states and 724 transitions. [2023-09-01 03:16:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 967 flow [2023-09-01 03:16:50,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 942 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:16:50,107 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 506 flow [2023-09-01 03:16:50,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-09-01 03:16:50,108 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-09-01 03:16:50,108 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 506 flow [2023-09-01 03:16:50,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:50,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:50,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:16:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:50,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:50,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:50,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800086, now seen corresponding path program 1 times [2023-09-01 03:16:50,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:50,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477259775] [2023-09-01 03:16:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:50,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:50,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:16:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:16:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:50,512 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:16:50,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:16:50,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 03:16:50,542 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 [2023-09-01 03:16:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:16:50,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:50,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477259775] [2023-09-01 03:16:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477259775] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:50,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946719355] [2023-09-01 03:16:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:50,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-09-01 03:16:50,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:50,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:50,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-09-01 03:16:50,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:51,323 INFO L130 PetriNetUnfolder]: 3048/5430 cut-off events. [2023-09-01 03:16:51,323 INFO L131 PetriNetUnfolder]: For 1495/1519 co-relation queries the response was YES. [2023-09-01 03:16:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13408 conditions, 5430 events. 3048/5430 cut-off events. For 1495/1519 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41967 event pairs, 2600 based on Foata normal form. 0/4110 useless extension candidates. Maximal degree in co-relation 13380. Up to 5329 conditions per place. [2023-09-01 03:16:51,354 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 57 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2023-09-01 03:16:51,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 636 flow [2023-09-01 03:16:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:16:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:16:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 690 transitions. [2023-09-01 03:16:51,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41767554479418884 [2023-09-01 03:16:51,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 690 transitions. [2023-09-01 03:16:51,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 690 transitions. [2023-09-01 03:16:51,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:51,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 690 transitions. [2023-09-01 03:16:51,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:51,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:51,369 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:51,369 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 506 flow. Second operand 4 states and 690 transitions. [2023-09-01 03:16:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 636 flow [2023-09-01 03:16:51,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 631 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:16:51,374 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 517 flow [2023-09-01 03:16:51,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-09-01 03:16:51,375 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-09-01 03:16:51,375 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 517 flow [2023-09-01 03:16:51,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:51,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:51,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:16:51,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:51,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:51,584 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:16:51,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800085, now seen corresponding path program 1 times [2023-09-01 03:16:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974017238] [2023-09-01 03:16:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:51,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:16:51,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:51,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:16:51,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:16:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:16:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:51,809 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:16:51,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:16:51,859 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:16:51,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:16:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:51,959 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 [2023-09-01 03:16:51,973 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:16:51,973 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 [2023-09-01 03:16:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:52,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:16:57,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974017238] [2023-09-01 03:16:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974017238] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:57,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:16:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801811168] [2023-09-01 03:16:57,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:16:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:16:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:17:04,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:17:08,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:17:13,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-09-01 03:17:13,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:13,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:13,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-09-01 03:17:13,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:20,549 WARN L222 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:17:22,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:17:30,792 WARN L222 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:17:42,854 INFO L130 PetriNetUnfolder]: 6284/11124 cut-off events. [2023-09-01 03:17:42,854 INFO L131 PetriNetUnfolder]: For 3443/3443 co-relation queries the response was YES. [2023-09-01 03:17:42,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 11124 events. 6284/11124 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 92557 event pairs, 5256 based on Foata normal form. 352/9244 useless extension candidates. Maximal degree in co-relation 27292. Up to 4194 conditions per place. [2023-09-01 03:17:42,904 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 110 selfloop transitions, 46 changer transitions 0/158 dead transitions. [2023-09-01 03:17:42,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 158 transitions, 1364 flow [2023-09-01 03:17:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:17:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:17:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2323 transitions. [2023-09-01 03:17:42,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37497982243744954 [2023-09-01 03:17:42,911 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2323 transitions. [2023-09-01 03:17:42,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2323 transitions. [2023-09-01 03:17:42,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:42,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2323 transitions. [2023-09-01 03:17:42,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 154.86666666666667) internal successors, (2323), 15 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:42,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:42,922 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:42,922 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 517 flow. Second operand 15 states and 2323 transitions. [2023-09-01 03:17:42,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 158 transitions, 1364 flow [2023-09-01 03:17:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 158 transitions, 1351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:17:42,931 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 912 flow [2023-09-01 03:17:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=912, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2023-09-01 03:17:42,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-09-01 03:17:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 912 flow [2023-09-01 03:17:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:42,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:42,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:43,145 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:17:43,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1685451407, now seen corresponding path program 1 times [2023-09-01 03:17:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471150550] [2023-09-01 03:17:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:17:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:43,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:43,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:43,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:17:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:17:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:17:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:17:43,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:43,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:43,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471150550] [2023-09-01 03:17:43,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471150550] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:43,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:17:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104903815] [2023-09-01 03:17:43,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:43,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:17:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:17:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:17:43,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-09-01 03:17:43,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 912 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:43,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:43,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-09-01 03:17:43,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:44,542 INFO L130 PetriNetUnfolder]: 4204/7900 cut-off events. [2023-09-01 03:17:44,543 INFO L131 PetriNetUnfolder]: For 4441/4537 co-relation queries the response was YES. [2023-09-01 03:17:44,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20548 conditions, 7900 events. 4204/7900 cut-off events. For 4441/4537 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 67289 event pairs, 3440 based on Foata normal form. 0/7268 useless extension candidates. Maximal degree in co-relation 20515. Up to 7669 conditions per place. [2023-09-01 03:17:44,596 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 51 selfloop transitions, 42 changer transitions 0/95 dead transitions. [2023-09-01 03:17:44,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 1096 flow [2023-09-01 03:17:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:17:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:17:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-09-01 03:17:44,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423728813559322 [2023-09-01 03:17:44,599 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-09-01 03:17:44,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-09-01 03:17:44,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:44,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-09-01 03:17:44,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:44,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:44,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:44,604 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 912 flow. Second operand 4 states and 700 transitions. [2023-09-01 03:17:44,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 1096 flow [2023-09-01 03:17:44,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 1077 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 03:17:44,615 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 975 flow [2023-09-01 03:17:44,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=975, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-09-01 03:17:44,616 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-09-01 03:17:44,616 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 975 flow [2023-09-01 03:17:44,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:44,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:44,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:44,636 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 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:44,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:44,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:17:44,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1685344759, now seen corresponding path program 1 times [2023-09-01 03:17:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456176798] [2023-09-01 03:17:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:17:44,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:44,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:44,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:17:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:17:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:17:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:44,945 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 [2023-09-01 03:17:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:17:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:17:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:17:45,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456176798] [2023-09-01 03:17:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456176798] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:17:45,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:17:45,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:17:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096981817] [2023-09-01 03:17:45,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:17:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:17:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:17:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:17:48,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-09-01 03:17:48,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 975 flow. Second operand has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:48,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:48,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-09-01 03:17:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:53,719 INFO L130 PetriNetUnfolder]: 8420/15284 cut-off events. [2023-09-01 03:17:53,719 INFO L131 PetriNetUnfolder]: For 6693/6789 co-relation queries the response was YES. [2023-09-01 03:17:53,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40037 conditions, 15284 events. 8420/15284 cut-off events. For 6693/6789 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 136362 event pairs, 928 based on Foata normal form. 768/14972 useless extension candidates. Maximal degree in co-relation 40003. Up to 4336 conditions per place. [2023-09-01 03:17:53,822 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 95 selfloop transitions, 53 changer transitions 0/150 dead transitions. [2023-09-01 03:17:53,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 150 transitions, 1467 flow [2023-09-01 03:17:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:17:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:17:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-09-01 03:17:53,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067796610169492 [2023-09-01 03:17:53,827 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-09-01 03:17:53,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-09-01 03:17:53,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:53,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-09-01 03:17:53,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:53,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:53,837 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:53,837 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 975 flow. Second operand 8 states and 1344 transitions. [2023-09-01 03:17:53,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 150 transitions, 1467 flow [2023-09-01 03:17:53,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 1383 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:17:53,862 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 1092 flow [2023-09-01 03:17:53,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2023-09-01 03:17:53,863 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2023-09-01 03:17:53,864 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 1092 flow [2023-09-01 03:17:53,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:53,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:53,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:53,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:54,076 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:17:54,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1188910439, now seen corresponding path program 2 times [2023-09-01 03:17:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435476323] [2023-09-01 03:17:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:17:54,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:54,078 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:54,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:17:54,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:17:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:17:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:17:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:54,284 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:17:54,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:17:54,340 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:17:54,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:17:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:17:54,443 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 [2023-09-01 03:17:54,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:17:54,458 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 [2023-09-01 03:17:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:17:54,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:54,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435476323] [2023-09-01 03:17:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435476323] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:17:54,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437171434] [2023-09-01 03:17:54,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:17:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:17:54,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:17:54,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 413 [2023-09-01 03:17:54,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 1092 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:54,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:54,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 413 [2023-09-01 03:17:54,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:56,393 INFO L130 PetriNetUnfolder]: 7252/13364 cut-off events. [2023-09-01 03:17:56,393 INFO L131 PetriNetUnfolder]: For 14392/14488 co-relation queries the response was YES. [2023-09-01 03:17:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40650 conditions, 13364 events. 7252/13364 cut-off events. For 14392/14488 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 119563 event pairs, 5936 based on Foata normal form. 736/13756 useless extension candidates. Maximal degree in co-relation 40611. Up to 13239 conditions per place. [2023-09-01 03:17:56,507 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 85 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2023-09-01 03:17:56,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 99 transitions, 1256 flow [2023-09-01 03:17:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:17:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:17:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-09-01 03:17:56,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40617433414043586 [2023-09-01 03:17:56,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-09-01 03:17:56,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-09-01 03:17:56,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:56,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-09-01 03:17:56,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:56,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:56,513 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:56,513 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 1092 flow. Second operand 4 states and 671 transitions. [2023-09-01 03:17:56,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 99 transitions, 1256 flow [2023-09-01 03:17:56,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 99 transitions, 1151 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 03:17:56,568 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 981 flow [2023-09-01 03:17:56,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=981, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2023-09-01 03:17:56,575 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2023-09-01 03:17:56,575 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 981 flow [2023-09-01 03:17:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:56,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:56,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:56,586 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 (18)] Ended with exit code 0 [2023-09-01 03:17:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:56,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:17:56,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash -944515027, now seen corresponding path program 1 times [2023-09-01 03:17:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413231870] [2023-09-01 03:17:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:17:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:56,790 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:56,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:17:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:17:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:17:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:17:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:17:57,034 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 11 treesize of output 9 [2023-09-01 03:17:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:17:57,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:57,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413231870] [2023-09-01 03:17:57,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413231870] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:17:57,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:17:57,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:17:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698813531] [2023-09-01 03:17:57,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:17:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:17:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:17:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:17:58,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 413 [2023-09-01 03:17:58,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 981 flow. Second operand has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:58,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:58,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 413 [2023-09-01 03:17:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:18:01,063 INFO L130 PetriNetUnfolder]: 6740/12756 cut-off events. [2023-09-01 03:18:01,063 INFO L131 PetriNetUnfolder]: For 7860/7932 co-relation queries the response was YES. [2023-09-01 03:18:01,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38153 conditions, 12756 events. 6740/12756 cut-off events. For 7860/7932 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 114381 event pairs, 752 based on Foata normal form. 576/13044 useless extension candidates. Maximal degree in co-relation 38115. Up to 2161 conditions per place. [2023-09-01 03:18:01,146 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 111 selfloop transitions, 43 changer transitions 0/156 dead transitions. [2023-09-01 03:18:01,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1446 flow [2023-09-01 03:18:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:18:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:18:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1693 transitions. [2023-09-01 03:18:01,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099273607748184 [2023-09-01 03:18:01,150 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1693 transitions. [2023-09-01 03:18:01,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1693 transitions. [2023-09-01 03:18:01,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:18:01,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1693 transitions. [2023-09-01 03:18:01,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:01,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:01,156 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:01,156 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 981 flow. Second operand 10 states and 1693 transitions. [2023-09-01 03:18:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1446 flow [2023-09-01 03:18:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 156 transitions, 1421 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 03:18:01,220 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 1050 flow [2023-09-01 03:18:01,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1050, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-09-01 03:18:01,220 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2023-09-01 03:18:01,220 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 1050 flow [2023-09-01 03:18:01,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:01,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:18:01,221 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-09-01 03:18:01,229 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 (19)] Ended with exit code 0 [2023-09-01 03:18:01,429 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 [2023-09-01 03:18:01,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:18:01,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:18:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1765179930, now seen corresponding path program 1 times [2023-09-01 03:18:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:18:01,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450907223] [2023-09-01 03:18:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:18:01,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:18:01,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:18:01,431 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) [2023-09-01 03:18:01,436 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 [2023-09-01 03:18:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:18:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:18:01,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:18:01,542 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 [2023-09-01 03:18:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:18:01,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:18:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:18:03,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:18:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450907223] [2023-09-01 03:18:03,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450907223] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:18:03,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:18:03,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 03:18:03,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273835827] [2023-09-01 03:18:03,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:18:03,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:18:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:18:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:18:03,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:18:17,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-09-01 03:18:17,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 1050 flow. Second operand has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:17,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:18:17,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-09-01 03:18:17,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:18:21,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:23,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:25,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:27,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:29,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:31,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:34,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:35,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:37,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:18:52,123 INFO L130 PetriNetUnfolder]: 13510/25572 cut-off events. [2023-09-01 03:18:52,123 INFO L131 PetriNetUnfolder]: For 20512/20518 co-relation queries the response was YES. [2023-09-01 03:18:52,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79322 conditions, 25572 events. 13510/25572 cut-off events. For 20512/20518 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 243542 event pairs, 11328 based on Foata normal form. 38/25590 useless extension candidates. Maximal degree in co-relation 79284. Up to 4321 conditions per place. [2023-09-01 03:18:52,444 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 503 selfloop transitions, 52 changer transitions 0/557 dead transitions. [2023-09-01 03:18:52,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 557 transitions, 4956 flow [2023-09-01 03:18:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 03:18:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 03:18:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3529 transitions. [2023-09-01 03:18:52,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42723970944309925 [2023-09-01 03:18:52,450 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3529 transitions. [2023-09-01 03:18:52,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3529 transitions. [2023-09-01 03:18:52,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:18:52,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3529 transitions. [2023-09-01 03:18:52,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 176.45) internal successors, (3529), 20 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:52,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:52,460 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:52,461 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 1050 flow. Second operand 20 states and 3529 transitions. [2023-09-01 03:18:52,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 557 transitions, 4956 flow [2023-09-01 03:18:52,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 557 transitions, 4500 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-09-01 03:18:52,659 INFO L231 Difference]: Finished difference. Result has 125 places, 119 transitions, 1358 flow [2023-09-01 03:18:52,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1358, PETRI_PLACES=125, PETRI_TRANSITIONS=119} [2023-09-01 03:18:52,660 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2023-09-01 03:18:52,660 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 119 transitions, 1358 flow [2023-09-01 03:18:52,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:18:52,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:18:52,662 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1] [2023-09-01 03:18:52,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:18:52,881 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 [2023-09-01 03:18:52,881 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:18:52,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:18:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1790483165, now seen corresponding path program 3 times [2023-09-01 03:18:52,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:18:52,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186489856] [2023-09-01 03:18:52,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:18:52,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:18:52,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:18:52,883 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) [2023-09-01 03:18:52,886 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 [2023-09-01 03:18:53,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-09-01 03:18:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:18:53,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:18:53,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:18:53,144 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:18:53,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:18:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:18:53,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:18:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:18:57,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:18:57,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186489856] [2023-09-01 03:18:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186489856] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:18:57,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:18:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-09-01 03:18:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535649937] [2023-09-01 03:18:57,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:18:57,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 03:18:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:18:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 03:18:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2023-09-01 03:19:30,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-09-01 03:19:30,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 119 transitions, 1358 flow. Second operand has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:19:30,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:19:30,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-09-01 03:19:30,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:19:42,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:44,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:46,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:48,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:50,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:52,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:54,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:56,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:19:58,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:00,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:02,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:04,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:09,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:14,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:20,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:24,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:20:39,158 INFO L130 PetriNetUnfolder]: 15202/28774 cut-off events. [2023-09-01 03:20:39,158 INFO L131 PetriNetUnfolder]: For 15092/15092 co-relation queries the response was YES. [2023-09-01 03:20:39,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83966 conditions, 28774 events. 15202/28774 cut-off events. For 15092/15092 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 274439 event pairs, 12744 based on Foata normal form. 14/28234 useless extension candidates. Maximal degree in co-relation 83918. Up to 4537 conditions per place. [2023-09-01 03:20:39,315 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 550 selfloop transitions, 89 changer transitions 0/641 dead transitions. [2023-09-01 03:20:39,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 641 transitions, 5545 flow [2023-09-01 03:20:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 03:20:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 03:20:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6138 transitions. [2023-09-01 03:20:39,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128329297820823 [2023-09-01 03:20:39,323 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6138 transitions. [2023-09-01 03:20:39,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6138 transitions. [2023-09-01 03:20:39,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:20:39,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6138 transitions. [2023-09-01 03:20:39,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 170.5) internal successors, (6138), 36 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:20:39,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:20:39,341 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:20:39,341 INFO L175 Difference]: Start difference. First operand has 125 places, 119 transitions, 1358 flow. Second operand 36 states and 6138 transitions. [2023-09-01 03:20:39,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 641 transitions, 5545 flow [2023-09-01 03:20:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 641 transitions, 5424 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-09-01 03:20:39,639 INFO L231 Difference]: Finished difference. Result has 168 places, 156 transitions, 2029 flow [2023-09-01 03:20:39,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2029, PETRI_PLACES=168, PETRI_TRANSITIONS=156} [2023-09-01 03:20:39,640 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2023-09-01 03:20:39,640 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 156 transitions, 2029 flow [2023-09-01 03:20:39,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:20:39,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:20:39,640 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:20:39,652 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 [2023-09-01 03:20:39,850 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 [2023-09-01 03:20:39,851 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:20:39,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:20:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1635547502, now seen corresponding path program 2 times [2023-09-01 03:20:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:20:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392520711] [2023-09-01 03:20:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:20:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:20:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:20:39,854 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) [2023-09-01 03:20:39,857 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 [2023-09-01 03:20:39,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:20:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:20:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:20:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:20:40,001 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 [2023-09-01 03:20:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:20:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:20:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:20:41,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:20:41,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392520711] [2023-09-01 03:20:41,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392520711] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:20:41,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:20:41,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-09-01 03:20:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854197334] [2023-09-01 03:20:41,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:20:41,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:20:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:20:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:20:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:20:54,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 413 [2023-09-01 03:20:54,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 156 transitions, 2029 flow. Second operand has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:20:54,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:20:54,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 413 [2023-09-01 03:20:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:21:01,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:21:04,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:21:10,176 INFO L130 PetriNetUnfolder]: 14894/28196 cut-off events. [2023-09-01 03:21:10,192 INFO L131 PetriNetUnfolder]: For 11914/11914 co-relation queries the response was YES. [2023-09-01 03:21:10,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82596 conditions, 28196 events. 14894/28196 cut-off events. For 11914/11914 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 268972 event pairs, 1692 based on Foata normal form. 90/27716 useless extension candidates. Maximal degree in co-relation 82530. Up to 10190 conditions per place. [2023-09-01 03:21:10,548 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 169 selfloop transitions, 112 changer transitions 0/283 dead transitions. [2023-09-01 03:21:10,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 283 transitions, 2999 flow [2023-09-01 03:21:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 03:21:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 03:21:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3174 transitions. [2023-09-01 03:21:10,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842615012106538 [2023-09-01 03:21:10,555 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3174 transitions. [2023-09-01 03:21:10,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3174 transitions. [2023-09-01 03:21:10,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:21:10,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3174 transitions. [2023-09-01 03:21:10,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:10,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:10,567 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:10,575 INFO L175 Difference]: Start difference. First operand has 168 places, 156 transitions, 2029 flow. Second operand 20 states and 3174 transitions. [2023-09-01 03:21:10,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 283 transitions, 2999 flow [2023-09-01 03:21:10,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 283 transitions, 2773 flow, removed 71 selfloop flow, removed 12 redundant places. [2023-09-01 03:21:10,996 INFO L231 Difference]: Finished difference. Result has 177 places, 170 transitions, 2138 flow [2023-09-01 03:21:10,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2138, PETRI_PLACES=177, PETRI_TRANSITIONS=170} [2023-09-01 03:21:10,997 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2023-09-01 03:21:10,997 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 170 transitions, 2138 flow [2023-09-01 03:21:10,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:10,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:21:10,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:21:11,013 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 [2023-09-01 03:21:11,207 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 [2023-09-01 03:21:11,207 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:21:11,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:21:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1883482390, now seen corresponding path program 1 times [2023-09-01 03:21:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:21:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296401435] [2023-09-01 03:21:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:21:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:21:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:21:11,210 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) [2023-09-01 03:21:11,212 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 [2023-09-01 03:21:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:21:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:21:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:21:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:21:11,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:21:11,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:21:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296401435] [2023-09-01 03:21:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296401435] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:21:11,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:21:11,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:21:11,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510810795] [2023-09-01 03:21:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:21:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:21:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:21:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:21:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:21:11,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 413 [2023-09-01 03:21:11,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 170 transitions, 2138 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:11,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:21:11,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 413 [2023-09-01 03:21:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:21:21,068 INFO L130 PetriNetUnfolder]: 31408/53888 cut-off events. [2023-09-01 03:21:21,068 INFO L131 PetriNetUnfolder]: For 47492/47492 co-relation queries the response was YES. [2023-09-01 03:21:21,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168581 conditions, 53888 events. 31408/53888 cut-off events. For 47492/47492 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 460077 event pairs, 8150 based on Foata normal form. 3260/57148 useless extension candidates. Maximal degree in co-relation 168512. Up to 21931 conditions per place. [2023-09-01 03:21:21,793 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 158 selfloop transitions, 58 changer transitions 0/216 dead transitions. [2023-09-01 03:21:21,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 216 transitions, 2869 flow [2023-09-01 03:21:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:21:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:21:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-09-01 03:21:21,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43341404358353514 [2023-09-01 03:21:21,796 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-09-01 03:21:21,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-09-01 03:21:21,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:21:21,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-09-01 03:21:21,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:21,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:21,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:21,799 INFO L175 Difference]: Start difference. First operand has 177 places, 170 transitions, 2138 flow. Second operand 5 states and 895 transitions. [2023-09-01 03:21:21,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 216 transitions, 2869 flow [2023-09-01 03:21:24,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2602 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-09-01 03:21:24,641 INFO L231 Difference]: Finished difference. Result has 173 places, 200 transitions, 2334 flow [2023-09-01 03:21:24,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2334, PETRI_PLACES=173, PETRI_TRANSITIONS=200} [2023-09-01 03:21:24,644 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2023-09-01 03:21:24,644 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 200 transitions, 2334 flow [2023-09-01 03:21:24,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:24,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:21:24,645 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1] [2023-09-01 03:21:24,658 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 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:21:24,856 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 [2023-09-01 03:21:24,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:21:24,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:21:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1052899988, now seen corresponding path program 3 times [2023-09-01 03:21:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:21:24,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306838923] [2023-09-01 03:21:24,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:21:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:21:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:21:24,859 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) [2023-09-01 03:21:24,861 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 [2023-09-01 03:21:25,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:21:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:21:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:21:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:21:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:21:25,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 28 [2023-09-01 03:21:25,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2023-09-01 03:21:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-09-01 03:21:25,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:21:25,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:21:25,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306838923] [2023-09-01 03:21:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306838923] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:21:25,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:21:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:21:25,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053574467] [2023-09-01 03:21:25,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:21:25,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:21:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:21:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:21:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:21:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-09-01 03:21:27,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 200 transitions, 2334 flow. Second operand has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:27,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:21:27,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-09-01 03:21:27,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:21:35,704 INFO L130 PetriNetUnfolder]: 23614/43772 cut-off events. [2023-09-01 03:21:35,704 INFO L131 PetriNetUnfolder]: For 80546/81202 co-relation queries the response was YES. [2023-09-01 03:21:36,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168820 conditions, 43772 events. 23614/43772 cut-off events. For 80546/81202 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 403012 event pairs, 2246 based on Foata normal form. 1166/44479 useless extension candidates. Maximal degree in co-relation 168753. Up to 34774 conditions per place. [2023-09-01 03:21:36,305 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 147 selfloop transitions, 66 changer transitions 0/218 dead transitions. [2023-09-01 03:21:36,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 218 transitions, 2844 flow [2023-09-01 03:21:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:21:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:21:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-09-01 03:21:36,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983050847457627 [2023-09-01 03:21:36,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-09-01 03:21:36,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-09-01 03:21:36,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:21:36,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-09-01 03:21:36,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:36,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:36,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:36,312 INFO L175 Difference]: Start difference. First operand has 173 places, 200 transitions, 2334 flow. Second operand 6 states and 987 transitions. [2023-09-01 03:21:36,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 218 transitions, 2844 flow [2023-09-01 03:21:38,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 218 transitions, 2842 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 03:21:38,338 INFO L231 Difference]: Finished difference. Result has 181 places, 208 transitions, 2580 flow [2023-09-01 03:21:38,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2580, PETRI_PLACES=181, PETRI_TRANSITIONS=208} [2023-09-01 03:21:38,339 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2023-09-01 03:21:38,339 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 208 transitions, 2580 flow [2023-09-01 03:21:38,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:38,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:21:38,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:21:38,348 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 [2023-09-01 03:21:38,548 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 [2023-09-01 03:21:38,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:21:38,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:21:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash 177946782, now seen corresponding path program 2 times [2023-09-01 03:21:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:21:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012395316] [2023-09-01 03:21:38,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:21:38,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:21:38,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:21:38,551 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) [2023-09-01 03:21:38,554 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 [2023-09-01 03:21:38,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:21:38,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:21:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:21:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:21:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:21:38,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:21:38,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:21:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012395316] [2023-09-01 03:21:38,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012395316] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:21:38,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:21:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:21:38,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872082720] [2023-09-01 03:21:38,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:21:38,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:21:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:21:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:21:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:21:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 413 [2023-09-01 03:21:38,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 208 transitions, 2580 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:38,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:21:38,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 413 [2023-09-01 03:21:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:21:50,508 INFO L130 PetriNetUnfolder]: 35884/63704 cut-off events. [2023-09-01 03:21:50,508 INFO L131 PetriNetUnfolder]: For 189132/189822 co-relation queries the response was YES. [2023-09-01 03:21:51,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255418 conditions, 63704 events. 35884/63704 cut-off events. For 189132/189822 co-relation queries the response was YES. Maximal size of possible extension queue 1777. Compared 585999 event pairs, 10285 based on Foata normal form. 954/64243 useless extension candidates. Maximal degree in co-relation 255346. Up to 30718 conditions per place. [2023-09-01 03:21:51,366 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 266 selfloop transitions, 2 changer transitions 1/274 dead transitions. [2023-09-01 03:21:51,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 274 transitions, 3846 flow [2023-09-01 03:21:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:21:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:21:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-09-01 03:21:51,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-09-01 03:21:51,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-09-01 03:21:51,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-09-01 03:21:51,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:21:51,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-09-01 03:21:51,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:51,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:51,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:51,371 INFO L175 Difference]: Start difference. First operand has 181 places, 208 transitions, 2580 flow. Second operand 3 states and 560 transitions. [2023-09-01 03:21:51,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 274 transitions, 3846 flow [2023-09-01 03:21:55,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 274 transitions, 3844 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 03:21:55,017 INFO L231 Difference]: Finished difference. Result has 184 places, 209 transitions, 2592 flow [2023-09-01 03:21:55,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2592, PETRI_PLACES=184, PETRI_TRANSITIONS=209} [2023-09-01 03:21:55,018 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2023-09-01 03:21:55,018 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 209 transitions, 2592 flow [2023-09-01 03:21:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:21:55,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:21:55,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 03:21:55,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:21:55,221 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 [2023-09-01 03:21:55,222 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:21:55,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:21:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -111170933, now seen corresponding path program 1 times [2023-09-01 03:21:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:21:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008485022] [2023-09-01 03:21:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:21:55,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:21:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:21:55,224 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) [2023-09-01 03:21:55,226 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 [2023-09-01 03:21:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:21:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:21:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:21:55,372 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 [2023-09-01 03:21:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:21:55,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:21:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:21:58,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:21:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008485022] [2023-09-01 03:21:58,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008485022] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:21:58,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:21:58,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2023-09-01 03:21:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088213968] [2023-09-01 03:21:58,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:21:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:21:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:21:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:21:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:22:14,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 413 [2023-09-01 03:22:14,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 209 transitions, 2592 flow. Second operand has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:22:14,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:22:14,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 413 [2023-09-01 03:22:14,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:22:24,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:22:27,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:22:42,091 INFO L130 PetriNetUnfolder]: 36189/64260 cut-off events. [2023-09-01 03:22:42,092 INFO L131 PetriNetUnfolder]: For 171698/173470 co-relation queries the response was YES. [2023-09-01 03:22:42,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275366 conditions, 64260 events. 36189/64260 cut-off events. For 171698/173470 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 590090 event pairs, 4626 based on Foata normal form. 1646/65522 useless extension candidates. Maximal degree in co-relation 275291. Up to 23369 conditions per place. [2023-09-01 03:22:43,412 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 260 selfloop transitions, 157 changer transitions 0/422 dead transitions. [2023-09-01 03:22:43,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 422 transitions, 4553 flow [2023-09-01 03:22:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 03:22:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 03:22:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4083 transitions. [2023-09-01 03:22:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38023840566213446 [2023-09-01 03:22:43,434 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4083 transitions. [2023-09-01 03:22:43,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4083 transitions. [2023-09-01 03:22:43,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:22:43,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4083 transitions. [2023-09-01 03:22:43,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 157.03846153846155) internal successors, (4083), 26 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:22:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:22:43,468 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:22:43,468 INFO L175 Difference]: Start difference. First operand has 184 places, 209 transitions, 2592 flow. Second operand 26 states and 4083 transitions. [2023-09-01 03:22:43,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 422 transitions, 4553 flow [2023-09-01 03:22:48,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 422 transitions, 4532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:22:48,104 INFO L231 Difference]: Finished difference. Result has 210 places, 226 transitions, 3159 flow [2023-09-01 03:22:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3159, PETRI_PLACES=210, PETRI_TRANSITIONS=226} [2023-09-01 03:22:48,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2023-09-01 03:22:48,105 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 226 transitions, 3159 flow [2023-09-01 03:22:48,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:22:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:22:48,105 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:22:48,116 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 [2023-09-01 03:22:48,310 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 [2023-09-01 03:22:48,310 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:22:48,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:22:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1152749730, now seen corresponding path program 2 times [2023-09-01 03:22:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:22:48,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416407383] [2023-09-01 03:22:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:22:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:22:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:22:48,313 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) [2023-09-01 03:22:48,315 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 (27)] Waiting until timeout for monitored process [2023-09-01 03:22:48,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:22:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:22:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 03:22:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:22:48,503 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 [2023-09-01 03:22:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:22:49,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:22:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:22:51,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:22:51,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416407383] [2023-09-01 03:22:51,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416407383] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:22:51,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:22:51,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:22:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656185986] [2023-09-01 03:22:51,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:22:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:22:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:22:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:22:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:23:06,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-09-01 03:23:06,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 226 transitions, 3159 flow. Second operand has 24 states, 24 states have (on average 150.5) internal successors, (3612), 24 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:23:06,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:23:06,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-09-01 03:23:06,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:23:14,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:23:17,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:23:19,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:23:22,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:23:24,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:23:27,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:23:33,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:23:35,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:24:01,695 INFO L130 PetriNetUnfolder]: 78756/135294 cut-off events. [2023-09-01 03:24:01,695 INFO L131 PetriNetUnfolder]: For 518174/521998 co-relation queries the response was YES. [2023-09-01 03:24:03,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643553 conditions, 135294 events. 78756/135294 cut-off events. For 518174/521998 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 1266001 event pairs, 6990 based on Foata normal form. 12821/147731 useless extension candidates. Maximal degree in co-relation 643475. Up to 29986 conditions per place. [2023-09-01 03:24:04,503 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 268 selfloop transitions, 183 changer transitions 0/456 dead transitions. [2023-09-01 03:24:04,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 456 transitions, 5797 flow [2023-09-01 03:24:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:24:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:24:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3799 transitions. [2023-09-01 03:24:04,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383272800645682 [2023-09-01 03:24:04,510 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3799 transitions. [2023-09-01 03:24:04,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3799 transitions. [2023-09-01 03:24:04,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:24:04,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3799 transitions. [2023-09-01 03:24:04,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 158.29166666666666) internal successors, (3799), 24 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:24:04,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:24:04,520 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:24:04,520 INFO L175 Difference]: Start difference. First operand has 210 places, 226 transitions, 3159 flow. Second operand 24 states and 3799 transitions. [2023-09-01 03:24:04,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 456 transitions, 5797 flow [2023-09-01 03:24:12,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 456 transitions, 5503 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-09-01 03:24:12,246 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 4201 flow [2023-09-01 03:24:12,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4201, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2023-09-01 03:24:12,247 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 178 predicate places. [2023-09-01 03:24:12,247 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 4201 flow [2023-09-01 03:24:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 150.5) internal successors, (3612), 24 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:24:12,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:24:12,248 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] [2023-09-01 03:24:12,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:24:12,449 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 [2023-09-01 03:24:12,449 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-09-01 03:24:12,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:24:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1110539665, now seen corresponding path program 1 times [2023-09-01 03:24:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:24:12,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842559653] [2023-09-01 03:24:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:24:12,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:24:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:24:12,452 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) [2023-09-01 03:24:12,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 03:24:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:24:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:24:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:24:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:24:12,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:24:12,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:24:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842559653] [2023-09-01 03:24:12,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842559653] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:24:12,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:24:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:24:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067209016] [2023-09-01 03:24:12,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:24:12,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:24:12,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:24:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:24:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:24:12,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 413 [2023-09-01 03:24:12,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 4201 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:24:12,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:24:12,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 413 [2023-09-01 03:24:12,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:24:52,468 INFO L130 PetriNetUnfolder]: 91158/161244 cut-off events. [2023-09-01 03:24:52,468 INFO L131 PetriNetUnfolder]: For 796380/799356 co-relation queries the response was YES.