./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-symm.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/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --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 01:54:10,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:54:10,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:54:10,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:54:10,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:54:10,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:54:10,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:54:10,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:54:10,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:54:10,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:54:10,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:54:10,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:54:10,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:54:10,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:54:10,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:54:10,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:54:10,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:54:10,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:54:10,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:54:10,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:54:10,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:54:10,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:54:10,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:54:10,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:54:10,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:54:10,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:54:10,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:54:10,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:54:10,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:54:10,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:54:10,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:54:10,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:54:10,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:54:10,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:54:10,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:54:10,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:54:10,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:54:10,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:54:10,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:54:10,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:54:10,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:54:10,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:54:10,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:54:10,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:54:10,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:54:10,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:54:10,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:54:10,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:54:10,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:54:10,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:54:10,463 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:54:10,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:54:10,464 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:54:10,464 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:54:10,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:54:10,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:54:10,466 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:54:10,466 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:54:10,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:54:10,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:54:10,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:54:10,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:54:10,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:54:10,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:54:10,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:54:10,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:54:10,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:54:10,467 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:54:10,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:54:10,468 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:54:10,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:54:10,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:54:10,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:54:10,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:54:10,722 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:54:10,723 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:54:10,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 01:54:11,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:54:11,863 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:54:11,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 01:54:11,870 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93ad818a/adf561548346473ba25737a2a31644e8/FLAG94f80a7d8 [2023-09-01 01:54:11,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93ad818a/adf561548346473ba25737a2a31644e8 [2023-09-01 01:54:11,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:54:11,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:54:11,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:11,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:54:11,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:54:11,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:11" (1/1) ... [2023-09-01 01:54:11,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acc3730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:11, skipping insertion in model container [2023-09-01 01:54:11,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:11" (1/1) ... [2023-09-01 01:54:11,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:54:11,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:12,063 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-09-01 01:54:12,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:12,082 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 01:54:12,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@273d099c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:12, skipping insertion in model container [2023-09-01 01:54:12,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:12,084 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:54:12,086 INFO L158 Benchmark]: Toolchain (without parser) took 193.73ms. Allocated memory is still 102.8MB. Free memory was 81.1MB in the beginning and 71.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:54:12,086 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 74.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:54:12,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.98ms. Allocated memory is still 102.8MB. Free memory was 80.9MB in the beginning and 71.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 01:54:12,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 74.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.98ms. Allocated memory is still 102.8MB. Free memory was 80.9MB in the beginning and 71.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --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 01:54:13,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:54:13,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:54:13,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:54:13,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:54:13,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:54:13,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:54:13,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:54:13,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:54:13,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:54:13,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:54:13,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:54:13,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:54:13,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:54:13,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:54:13,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:54:13,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:54:13,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:54:13,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:54:13,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:54:13,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:54:13,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:54:13,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:54:13,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:54:13,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:54:13,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:54:13,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:54:13,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:54:13,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:54:13,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:54:13,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:54:13,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:54:13,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:54:13,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:54:13,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:54:13,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:54:13,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:54:13,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:54:13,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:54:13,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:54:13,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:54:13,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:54:13,549 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:54:13,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:54:13,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:54:13,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:54:13,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:54:13,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:54:13,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:54:13,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:54:13,552 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:54:13,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:54:13,552 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:54:13,552 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:54:13,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:54:13,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:54:13,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:54:13,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:54:13,555 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:54:13,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:54:13,556 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:54:13,556 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:54:13,556 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:54:13,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:54:13,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:54:13,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:54:13,815 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:54:13,815 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:54:13,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 01:54:14,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:54:14,931 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:54:14,931 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 01:54:14,935 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011d97a29/0705728fb2814fbe85031abe00823688/FLAG2bfbdfeab [2023-09-01 01:54:14,944 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011d97a29/0705728fb2814fbe85031abe00823688 [2023-09-01 01:54:14,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:54:14,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:54:14,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:14,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:54:14,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:54:14,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:14" (1/1) ... [2023-09-01 01:54:14,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d5d437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:14, skipping insertion in model container [2023-09-01 01:54:14,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:54:14" (1/1) ... [2023-09-01 01:54:14,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:54:14,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:15,100 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-09-01 01:54:15,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:15,113 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:54:15,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:54:15,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-09-01 01:54:15,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:15,131 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:54:15,156 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-09-01 01:54:15,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:54:15,173 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:54:15,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15 WrapperNode [2023-09-01 01:54:15,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:54:15,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:54:15,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:54:15,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:54:15,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,198 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2023-09-01 01:54:15,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:54:15,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:54:15,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:54:15,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:54:15,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:54:15,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:54:15,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:54:15,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:54:15,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (1/1) ... [2023-09-01 01:54:15,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:54:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:54:15,254 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 01:54:15,272 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 01:54:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:54:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:54:15,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:54:15,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:54:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:54:15,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:54:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:54:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:54:15,284 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 01:54:15,420 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:54:15,421 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:54:15,873 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:54:15,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:54:15,879 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:54:15,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:54:15 BoogieIcfgContainer [2023-09-01 01:54:15,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:54:15,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:54:15,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:54:15,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:54:15,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:54:14" (1/3) ... [2023-09-01 01:54:15,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3c29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:54:15, skipping insertion in model container [2023-09-01 01:54:15,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:54:15" (2/3) ... [2023-09-01 01:54:15,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3c29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:54:15, skipping insertion in model container [2023-09-01 01:54:15,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:54:15" (3/3) ... [2023-09-01 01:54:15,887 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-09-01 01:54:15,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:54:15,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 01:54:15,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:54:15,993 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:54:16,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 239 transitions, 494 flow [2023-09-01 01:54:16,106 INFO L130 PetriNetUnfolder]: 21/237 cut-off events. [2023-09-01 01:54:16,106 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:54:16,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 21/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 411 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 157. Up to 3 conditions per place. [2023-09-01 01:54:16,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 239 transitions, 494 flow [2023-09-01 01:54:16,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 233 transitions, 478 flow [2023-09-01 01:54:16,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:54:16,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 233 transitions, 478 flow [2023-09-01 01:54:16,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 233 transitions, 478 flow [2023-09-01 01:54:16,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 233 transitions, 478 flow [2023-09-01 01:54:16,153 INFO L130 PetriNetUnfolder]: 21/233 cut-off events. [2023-09-01 01:54:16,153 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:54:16,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 233 events. 21/233 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 407 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 157. Up to 3 conditions per place. [2023-09-01 01:54:16,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2023-09-01 01:54:34,411 INFO L134 LiptonReduction]: Checked pairs total: 7607 [2023-09-01 01:54:34,411 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-09-01 01:54:34,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:54:34,425 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;@585fb744, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:54:34,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-09-01 01:54:34,431 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:54:34,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:54:34,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:34,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:54:34,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:34,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash 29927, now seen corresponding path program 1 times [2023-09-01 01:54:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824239174] [2023-09-01 01:54:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:34,457 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 01:54:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:34,460 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 01:54:34,461 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 01:54:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:54:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:34,702 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:54:34,703 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 01:54:34,735 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 01:54:34,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:34,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824239174] [2023-09-01 01:54:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824239174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:34,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297420742] [2023-09-01 01:54:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:34,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2023-09-01 01:54:34,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 01:54:34,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:34,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2023-09-01 01:54:34,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:35,484 INFO L130 PetriNetUnfolder]: 1793/2765 cut-off events. [2023-09-01 01:54:35,484 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 01:54:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 2765 events. 1793/2765 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 14322 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 2648. Up to 1385 conditions per place. [2023-09-01 01:54:35,495 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 91 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-09-01 01:54:35,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 95 transitions, 404 flow [2023-09-01 01:54:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-09-01 01:54:35,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4953519256308101 [2023-09-01 01:54:35,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-09-01 01:54:35,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-09-01 01:54:35,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:35,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-09-01 01:54:35,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:35,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:35,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:35,519 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 120 flow. Second operand 3 states and 746 transitions. [2023-09-01 01:54:35,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 95 transitions, 404 flow [2023-09-01 01:54:35,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:54:35,523 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 134 flow [2023-09-01 01:54:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2023-09-01 01:54:35,527 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-09-01 01:54:35,527 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 134 flow [2023-09-01 01:54:35,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 01:54:35,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:35,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:54:35,537 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 01:54:35,745 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 01:54:35,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:35,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash 29925, now seen corresponding path program 1 times [2023-09-01 01:54:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790404906] [2023-09-01 01:54:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:35,746 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 01:54:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:35,747 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 01:54:35,749 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 01:54:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:54:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:35,811 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:54:35,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 01:54:35,820 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 01:54:35,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:35,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790404906] [2023-09-01 01:54:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790404906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:35,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595157742] [2023-09-01 01:54:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:35,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:35,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:35,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2023-09-01 01:54:35,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 01:54:35,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:35,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2023-09-01 01:54:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:36,328 INFO L130 PetriNetUnfolder]: 1793/2761 cut-off events. [2023-09-01 01:54:36,328 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 01:54:36,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5569 conditions, 2761 events. 1793/2761 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 14292 event pairs, 1358 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 2773. Up to 2761 conditions per place. [2023-09-01 01:54:36,338 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 49 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-09-01 01:54:36,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 230 flow [2023-09-01 01:54:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-09-01 01:54:36,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45683930942895085 [2023-09-01 01:54:36,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-09-01 01:54:36,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-09-01 01:54:36,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:36,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-09-01 01:54:36,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 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 01:54:36,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:36,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:36,345 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 134 flow. Second operand 3 states and 688 transitions. [2023-09-01 01:54:36,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 230 flow [2023-09-01 01:54:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:54:36,347 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 124 flow [2023-09-01 01:54:36,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-09-01 01:54:36,347 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-09-01 01:54:36,348 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 124 flow [2023-09-01 01:54:36,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 01:54:36,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:36,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:54:36,359 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 01:54:36,559 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 01:54:36,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:36,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 931320, now seen corresponding path program 1 times [2023-09-01 01:54:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188929518] [2023-09-01 01:54:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:36,561 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 01:54:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:36,562 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 01:54:36,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 01:54:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:54:36,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:36,655 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-09-01 01:54:36,655 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 01:54:36,702 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:54:36,703 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 01:54:36,710 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 01:54:36,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:36,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188929518] [2023-09-01 01:54:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188929518] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:36,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:36,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:36,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264929940] [2023-09-01 01:54:36,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:36,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:36,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 502 [2023-09-01 01:54:36,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 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 01:54:36,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:36,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 502 [2023-09-01 01:54:36,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:37,170 INFO L130 PetriNetUnfolder]: 1345/2115 cut-off events. [2023-09-01 01:54:37,170 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 01:54:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 2115 events. 1345/2115 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 10736 event pairs, 1008 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 4266. Up to 2115 conditions per place. [2023-09-01 01:54:37,178 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 47 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-09-01 01:54:37,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 216 flow [2023-09-01 01:54:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-09-01 01:54:37,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46148738379814075 [2023-09-01 01:54:37,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-09-01 01:54:37,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-09-01 01:54:37,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:37,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-09-01 01:54:37,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 01:54:37,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:37,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:37,184 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 124 flow. Second operand 3 states and 695 transitions. [2023-09-01 01:54:37,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 216 flow [2023-09-01 01:54:37,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:37,186 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 121 flow [2023-09-01 01:54:37,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-09-01 01:54:37,186 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-09-01 01:54:37,187 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 121 flow [2023-09-01 01:54:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 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 01:54:37,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:37,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:54:37,196 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 01:54:37,394 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 01:54:37,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:37,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 931319, now seen corresponding path program 1 times [2023-09-01 01:54:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:37,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706497276] [2023-09-01 01:54:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:37,396 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 01:54:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:37,396 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 01:54:37,398 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 01:54:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:54:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:37,482 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:54:37,483 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 01:54:37,491 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 01:54:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:37,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:54:37,561 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 01:54:37,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:37,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706497276] [2023-09-01 01:54:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706497276] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:37,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:37,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:54:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657070049] [2023-09-01 01:54:37,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:54:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:54:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:54:37,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 502 [2023-09-01 01:54:37,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 01:54:37,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:37,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 502 [2023-09-01 01:54:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:38,066 INFO L130 PetriNetUnfolder]: 897/1469 cut-off events. [2023-09-01 01:54:38,066 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 01:54:38,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1469 events. 897/1469 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7354 event pairs, 658 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 2974. Up to 1469 conditions per place. [2023-09-01 01:54:38,071 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-09-01 01:54:38,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 209 flow [2023-09-01 01:54:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-09-01 01:54:38,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601593625498008 [2023-09-01 01:54:38,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-09-01 01:54:38,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-09-01 01:54:38,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:38,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-09-01 01:54:38,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 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 01:54:38,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:38,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:38,077 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 121 flow. Second operand 3 states and 693 transitions. [2023-09-01 01:54:38,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 209 flow [2023-09-01 01:54:38,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:38,078 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 118 flow [2023-09-01 01:54:38,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-09-01 01:54:38,078 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-09-01 01:54:38,078 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 118 flow [2023-09-01 01:54:38,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 01:54:38,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:38,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:54:38,087 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 01:54:38,284 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 01:54:38,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:38,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash 929888, now seen corresponding path program 1 times [2023-09-01 01:54:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:38,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33860392] [2023-09-01 01:54:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:38,286 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 01:54:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:38,287 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 01:54:38,287 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 01:54:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:54:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:38,374 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:54:38,374 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 01:54:38,418 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 01:54:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:54:38,549 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 01:54:38,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:38,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33860392] [2023-09-01 01:54:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33860392] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:38,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:54:38,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:54:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154965602] [2023-09-01 01:54:38,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:38,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:54:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:54:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:54:39,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-09-01 01:54:39,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 01:54:39,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:39,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-09-01 01:54:39,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:40,853 INFO L130 PetriNetUnfolder]: 1349/2210 cut-off events. [2023-09-01 01:54:40,853 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:54:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4490 conditions, 2210 events. 1349/2210 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11682 event pairs, 987 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 4480. Up to 736 conditions per place. [2023-09-01 01:54:40,860 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 116 selfloop transitions, 15 changer transitions 0/131 dead transitions. [2023-09-01 01:54:40,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 131 transitions, 576 flow [2023-09-01 01:54:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:54:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:54:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1355 transitions. [2023-09-01 01:54:40,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449867197875166 [2023-09-01 01:54:40,863 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1355 transitions. [2023-09-01 01:54:40,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1355 transitions. [2023-09-01 01:54:40,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:40,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1355 transitions. [2023-09-01 01:54:40,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.83333333333334) internal successors, (1355), 6 states have internal predecessors, (1355), 0 states have call successors, (0), 0 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 01:54:40,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 01:54:40,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 01:54:40,871 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 118 flow. Second operand 6 states and 1355 transitions. [2023-09-01 01:54:40,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 131 transitions, 576 flow [2023-09-01 01:54:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 131 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:40,874 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 230 flow [2023-09-01 01:54:40,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-09-01 01:54:40,877 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-09-01 01:54:40,877 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 230 flow [2023-09-01 01:54:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 01:54:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:40,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:54:40,887 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 (6)] Ended with exit code 0 [2023-09-01 01:54:41,085 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 01:54:41,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:41,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash 895017334, now seen corresponding path program 1 times [2023-09-01 01:54:41,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:41,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458667302] [2023-09-01 01:54:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:41,088 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 01:54:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:41,089 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 01:54:41,091 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 01:54:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:54:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:41,185 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:54:41,185 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 01:54:41,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 01:54:41,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:54:41,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:54:41,260 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 01:54:41,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:41,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458667302] [2023-09-01 01:54:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458667302] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:41,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:54:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730011924] [2023-09-01 01:54:41,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:41,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:54:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:54:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:54:41,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 502 [2023-09-01 01:54:41,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 01:54:41,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:41,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 502 [2023-09-01 01:54:41,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:41,857 INFO L130 PetriNetUnfolder]: 1277/2075 cut-off events. [2023-09-01 01:54:41,857 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 01:54:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2075 events. 1277/2075 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10948 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 4250. Up to 2075 conditions per place. [2023-09-01 01:54:41,868 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 01:54:41,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 336 flow [2023-09-01 01:54:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 685 transitions. [2023-09-01 01:54:41,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548472775564409 [2023-09-01 01:54:41,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 685 transitions. [2023-09-01 01:54:41,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 685 transitions. [2023-09-01 01:54:41,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:41,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 685 transitions. [2023-09-01 01:54:41,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 01:54:41,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:41,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:41,874 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 230 flow. Second operand 3 states and 685 transitions. [2023-09-01 01:54:41,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 336 flow [2023-09-01 01:54:41,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 317 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:41,878 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 209 flow [2023-09-01 01:54:41,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-09-01 01:54:41,880 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-09-01 01:54:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 209 flow [2023-09-01 01:54:41,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 01:54:41,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:41,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:54:41,891 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 (7)] Ended with exit code 0 [2023-09-01 01:54:42,091 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 01:54:42,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:42,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash 895017335, now seen corresponding path program 1 times [2023-09-01 01:54:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:42,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899327336] [2023-09-01 01:54:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:54:42,094 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 01:54:42,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:42,095 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 01:54:42,096 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 01:54:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:54:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 01:54:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:42,166 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 01:54:42,167 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 01:54:42,186 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:54:42,186 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 01:54:42,197 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 01:54:42,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:54:42,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899327336] [2023-09-01 01:54:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899327336] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:54:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:54:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:54:42,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514272938] [2023-09-01 01:54:42,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:54:42,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:54:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:54:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:54:42,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 502 [2023-09-01 01:54:42,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 01:54:42,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:42,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 502 [2023-09-01 01:54:42,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:42,534 INFO L130 PetriNetUnfolder]: 1205/1940 cut-off events. [2023-09-01 01:54:42,534 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 01:54:42,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1940 events. 1205/1940 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 9979 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3970. Up to 1940 conditions per place. [2023-09-01 01:54:42,541 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 01:54:42,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 311 flow [2023-09-01 01:54:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:54:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:54:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-09-01 01:54:42,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535192563081009 [2023-09-01 01:54:42,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-09-01 01:54:42,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-09-01 01:54:42,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:54:42,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-09-01 01:54:42,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 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 01:54:42,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:42,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 01:54:42,549 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 209 flow. Second operand 3 states and 683 transitions. [2023-09-01 01:54:42,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 311 flow [2023-09-01 01:54:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:54:42,551 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 206 flow [2023-09-01 01:54:42,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-09-01 01:54:42,551 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-09-01 01:54:42,551 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 206 flow [2023-09-01 01:54:42,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 01:54:42,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:54:42,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:54:42,560 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 01:54:42,764 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 01:54:42,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:54:42,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:54:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1934625575, now seen corresponding path program 2 times [2023-09-01 01:54:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:54:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138153003] [2023-09-01 01:54:42,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:54:42,766 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 01:54:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:54:42,766 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 01:54:42,767 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 01:54:42,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:54:42,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:54:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:54:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:54:42,864 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:54:42,864 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 01:54:42,965 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 01:54:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:54:43,433 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 01:54:43,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:54:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138153003] [2023-09-01 01:54:43,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138153003] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:43,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:54:43,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:54:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004510800] [2023-09-01 01:54:43,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:43,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:54:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:54:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:54:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:54:47,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-09-01 01:54:47,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 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 01:54:47,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:47,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-09-01 01:54:47,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:50,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:54:52,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:54:53,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:54:56,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:54:58,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:55:01,821 INFO L130 PetriNetUnfolder]: 4003/6437 cut-off events. [2023-09-01 01:55:01,822 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-09-01 01:55:01,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13134 conditions, 6437 events. 4003/6437 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38006 event pairs, 2910 based on Foata normal form. 12/2882 useless extension candidates. Maximal degree in co-relation 13117. Up to 980 conditions per place. [2023-09-01 01:55:01,838 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 335 selfloop transitions, 32 changer transitions 0/367 dead transitions. [2023-09-01 01:55:01,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 367 transitions, 1708 flow [2023-09-01 01:55:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:55:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:55:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2839 transitions. [2023-09-01 01:55:01,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712815405046481 [2023-09-01 01:55:01,844 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2839 transitions. [2023-09-01 01:55:01,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2839 transitions. [2023-09-01 01:55:01,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:01,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2839 transitions. [2023-09-01 01:55:01,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 236.58333333333334) internal successors, (2839), 12 states have internal predecessors, (2839), 0 states have call successors, (0), 0 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 01:55:01,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 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 01:55:01,856 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 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 01:55:01,856 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 206 flow. Second operand 12 states and 2839 transitions. [2023-09-01 01:55:01,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 367 transitions, 1708 flow [2023-09-01 01:55:01,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 367 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:01,860 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 449 flow [2023-09-01 01:55:01,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2023-09-01 01:55:01,860 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-09-01 01:55:01,861 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 449 flow [2023-09-01 01:55:01,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 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 01:55:01,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:01,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:55:01,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-09-01 01:55:02,068 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 01:55:02,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:02,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1975732447, now seen corresponding path program 1 times [2023-09-01 01:55:02,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:02,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871169778] [2023-09-01 01:55:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:02,072 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 01:55:02,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:02,073 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 01:55:02,073 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 01:55:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:55:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:02,143 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 01:55:02,194 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 01:55:02,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:02,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871169778] [2023-09-01 01:55:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871169778] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:02,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:02,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:55:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785444902] [2023-09-01 01:55:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:02,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:02,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-09-01 01:55:02,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:02,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:02,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-09-01 01:55:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:03,733 INFO L130 PetriNetUnfolder]: 7323/11837 cut-off events. [2023-09-01 01:55:03,733 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-09-01 01:55:03,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24133 conditions, 11837 events. 7323/11837 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 80742 event pairs, 2910 based on Foata normal form. 0/5276 useless extension candidates. Maximal degree in co-relation 24108. Up to 6401 conditions per place. [2023-09-01 01:55:03,772 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 83 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2023-09-01 01:55:03,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 708 flow [2023-09-01 01:55:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1113 transitions. [2023-09-01 01:55:03,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434262948207171 [2023-09-01 01:55:03,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1113 transitions. [2023-09-01 01:55:03,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1113 transitions. [2023-09-01 01:55:03,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:03,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1113 transitions. [2023-09-01 01:55:03,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 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 01:55:03,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:03,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:03,781 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 449 flow. Second operand 5 states and 1113 transitions. [2023-09-01 01:55:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 708 flow [2023-09-01 01:55:03,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 649 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 01:55:03,784 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 432 flow [2023-09-01 01:55:03,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-09-01 01:55:03,785 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-09-01 01:55:03,785 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 432 flow [2023-09-01 01:55:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:03,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:03,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 01:55:03,794 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 01:55:03,991 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 01:55:03,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:03,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1975732397, now seen corresponding path program 1 times [2023-09-01 01:55:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:03,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398094694] [2023-09-01 01:55:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:03,993 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 01:55:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:03,994 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 01:55:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 01:55:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:55:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:04,096 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 01:55:04,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:04,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398094694] [2023-09-01 01:55:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398094694] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:04,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:04,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:55:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173147198] [2023-09-01 01:55:04,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:04,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:04,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:04,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-09-01 01:55:04,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 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 01:55:04,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:04,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-09-01 01:55:04,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:05,706 INFO L130 PetriNetUnfolder]: 8494/13990 cut-off events. [2023-09-01 01:55:05,706 INFO L131 PetriNetUnfolder]: For 1562/1562 co-relation queries the response was YES. [2023-09-01 01:55:05,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29506 conditions, 13990 events. 8494/13990 cut-off events. For 1562/1562 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 97180 event pairs, 5940 based on Foata normal form. 0/7350 useless extension candidates. Maximal degree in co-relation 29480. Up to 11836 conditions per place. [2023-09-01 01:55:05,747 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 119 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2023-09-01 01:55:05,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 123 transitions, 893 flow [2023-09-01 01:55:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1132 transitions. [2023-09-01 01:55:05,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450996015936255 [2023-09-01 01:55:05,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1132 transitions. [2023-09-01 01:55:05,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1132 transitions. [2023-09-01 01:55:05,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:05,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1132 transitions. [2023-09-01 01:55:05,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.4) internal successors, (1132), 5 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 01:55:05,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:05,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:05,764 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 432 flow. Second operand 5 states and 1132 transitions. [2023-09-01 01:55:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 123 transitions, 893 flow [2023-09-01 01:55:05,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 123 transitions, 852 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:55:05,769 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 425 flow [2023-09-01 01:55:05,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2023-09-01 01:55:05,770 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-09-01 01:55:05,770 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 425 flow [2023-09-01 01:55:05,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 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 01:55:05,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:05,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:05,780 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 01:55:05,976 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 01:55:05,977 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:05,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash -115040346, now seen corresponding path program 1 times [2023-09-01 01:55:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879615665] [2023-09-01 01:55:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:05,978 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 01:55:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:05,978 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 01:55:05,979 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 01:55:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:55:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:06,079 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 01:55:06,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:06,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:06,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879615665] [2023-09-01 01:55:06,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879615665] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:06,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:06,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:55:06,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352042420] [2023-09-01 01:55:06,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:06,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-09-01 01:55:06,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 01:55:06,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:06,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-09-01 01:55:06,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:07,720 INFO L130 PetriNetUnfolder]: 7880/13024 cut-off events. [2023-09-01 01:55:07,720 INFO L131 PetriNetUnfolder]: For 2206/2206 co-relation queries the response was YES. [2023-09-01 01:55:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28948 conditions, 13024 events. 7880/13024 cut-off events. For 2206/2206 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 90124 event pairs, 5910 based on Foata normal form. 16/7208 useless extension candidates. Maximal degree in co-relation 28919. Up to 12586 conditions per place. [2023-09-01 01:55:07,769 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 95 selfloop transitions, 15 changer transitions 0/110 dead transitions. [2023-09-01 01:55:07,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 738 flow [2023-09-01 01:55:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2023-09-01 01:55:07,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449800796812749 [2023-09-01 01:55:07,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2023-09-01 01:55:07,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2023-09-01 01:55:07,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:07,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2023-09-01 01:55:07,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 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 01:55:07,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:07,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:07,778 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 425 flow. Second operand 5 states and 1129 transitions. [2023-09-01 01:55:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 738 flow [2023-09-01 01:55:07,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 732 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:55:07,785 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 501 flow [2023-09-01 01:55:07,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=501, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2023-09-01 01:55:07,786 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-09-01 01:55:07,786 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 501 flow [2023-09-01 01:55:07,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 01:55:07,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:07,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:07,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:07,993 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 01:55:07,993 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:07,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 723796991, now seen corresponding path program 1 times [2023-09-01 01:55:07,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:07,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237200222] [2023-09-01 01:55:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:07,994 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 01:55:07,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:07,995 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 01:55:07,995 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 01:55:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:55:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:08,109 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:55:08,109 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 01:55:08,139 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:55:08,140 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 01:55:08,157 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 01:55:08,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:08,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:08,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237200222] [2023-09-01 01:55:08,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237200222] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:08,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:08,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:55:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514395142] [2023-09-01 01:55:08,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:08,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:55:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:55:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:55:08,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-09-01 01:55:08,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 501 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 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 01:55:08,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:08,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-09-01 01:55:08,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:09,320 INFO L130 PetriNetUnfolder]: 6142/10146 cut-off events. [2023-09-01 01:55:09,320 INFO L131 PetriNetUnfolder]: For 3170/3170 co-relation queries the response was YES. [2023-09-01 01:55:09,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23693 conditions, 10146 events. 6142/10146 cut-off events. For 3170/3170 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 67029 event pairs, 4496 based on Foata normal form. 0/6066 useless extension candidates. Maximal degree in co-relation 23661. Up to 10133 conditions per place. [2023-09-01 01:55:09,344 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 62 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2023-09-01 01:55:09,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 639 flow [2023-09-01 01:55:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:55:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:55:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 851 transitions. [2023-09-01 01:55:09,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42380478087649404 [2023-09-01 01:55:09,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 851 transitions. [2023-09-01 01:55:09,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 851 transitions. [2023-09-01 01:55:09,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:09,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 851 transitions. [2023-09-01 01:55:09,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 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 01:55:09,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 01:55:09,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 01:55:09,350 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 501 flow. Second operand 4 states and 851 transitions. [2023-09-01 01:55:09,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 639 flow [2023-09-01 01:55:09,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 608 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 01:55:09,359 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 484 flow [2023-09-01 01:55:09,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=484, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-09-01 01:55:09,360 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-09-01 01:55:09,360 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 484 flow [2023-09-01 01:55:09,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 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 01:55:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:09,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:09,368 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 01:55:09,567 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 01:55:09,568 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:09,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash 723796992, now seen corresponding path program 1 times [2023-09-01 01:55:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:09,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112270207] [2023-09-01 01:55:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:09,568 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 01:55:09,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:09,569 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 01:55:09,570 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 01:55:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:55:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:09,705 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:55:09,705 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 01:55:09,770 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-09-01 01:55:09,771 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 16 treesize of output 22 [2023-09-01 01:55:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:55:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:55:10,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:10,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112270207] [2023-09-01 01:55:10,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112270207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:55:10,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:55:10,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:55:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870538217] [2023-09-01 01:55:10,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:55:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:55:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:55:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:55:14,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 502 [2023-09-01 01:55:14,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 484 flow. Second operand has 14 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 01:55:14,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:14,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 502 [2023-09-01 01:55:14,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:27,325 INFO L130 PetriNetUnfolder]: 11457/19138 cut-off events. [2023-09-01 01:55:27,326 INFO L131 PetriNetUnfolder]: For 5040/5040 co-relation queries the response was YES. [2023-09-01 01:55:27,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44293 conditions, 19138 events. 11457/19138 cut-off events. For 5040/5040 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 142555 event pairs, 2835 based on Foata normal form. 0/11718 useless extension candidates. Maximal degree in co-relation 44261. Up to 3876 conditions per place. [2023-09-01 01:55:27,390 INFO L137 encePairwiseOnDemand]: 487/502 looper letters, 380 selfloop transitions, 80 changer transitions 0/460 dead transitions. [2023-09-01 01:55:27,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 460 transitions, 2575 flow [2023-09-01 01:55:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 01:55:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 01:55:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6166 transitions. [2023-09-01 01:55:27,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094289508632138 [2023-09-01 01:55:27,401 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6166 transitions. [2023-09-01 01:55:27,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6166 transitions. [2023-09-01 01:55:27,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:27,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6166 transitions. [2023-09-01 01:55:27,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.53333333333333) internal successors, (6166), 30 states have internal predecessors, (6166), 0 states have call successors, (0), 0 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 01:55:27,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 502.0) internal successors, (15562), 31 states have internal predecessors, (15562), 0 states have call successors, (0), 0 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 01:55:27,423 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 502.0) internal successors, (15562), 31 states have internal predecessors, (15562), 0 states have call successors, (0), 0 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 01:55:27,423 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 484 flow. Second operand 30 states and 6166 transitions. [2023-09-01 01:55:27,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 460 transitions, 2575 flow [2023-09-01 01:55:27,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 460 transitions, 2562 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:55:27,440 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1072 flow [2023-09-01 01:55:27,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1072, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2023-09-01 01:55:27,440 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-09-01 01:55:27,440 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1072 flow [2023-09-01 01:55:27,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 192.14285714285714) internal successors, (2690), 14 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 01:55:27,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:27,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:27,451 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 (14)] Ended with exit code 0 [2023-09-01 01:55:27,648 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 01:55:27,648 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:27,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 723797042, now seen corresponding path program 1 times [2023-09-01 01:55:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940103116] [2023-09-01 01:55:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:27,649 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 01:55:27,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:27,651 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 01:55:27,653 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 01:55:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:55:27,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:27,729 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 01:55:27,740 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 01:55:27,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:27,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940103116] [2023-09-01 01:55:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940103116] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:27,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:27,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:55:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417950853] [2023-09-01 01:55:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:27,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:55:27,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:55:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:55:27,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-09-01 01:55:27,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1072 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 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 01:55:27,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:27,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-09-01 01:55:27,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:29,227 INFO L130 PetriNetUnfolder]: 8441/14120 cut-off events. [2023-09-01 01:55:29,227 INFO L131 PetriNetUnfolder]: For 10756/10756 co-relation queries the response was YES. [2023-09-01 01:55:29,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36529 conditions, 14120 events. 8441/14120 cut-off events. For 10756/10756 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 98561 event pairs, 6003 based on Foata normal form. 0/10868 useless extension candidates. Maximal degree in co-relation 36490. Up to 14058 conditions per place. [2023-09-01 01:55:29,274 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 107 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2023-09-01 01:55:29,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 121 transitions, 1219 flow [2023-09-01 01:55:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:55:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:55:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-09-01 01:55:29,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218127490039841 [2023-09-01 01:55:29,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-09-01 01:55:29,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-09-01 01:55:29,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:29,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-09-01 01:55:29,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 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 01:55:29,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 01:55:29,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 01:55:29,279 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1072 flow. Second operand 4 states and 847 transitions. [2023-09-01 01:55:29,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 121 transitions, 1219 flow [2023-09-01 01:55:29,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 121 transitions, 1051 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-09-01 01:55:29,330 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 837 flow [2023-09-01 01:55:29,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=837, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2023-09-01 01:55:29,330 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-09-01 01:55:29,330 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 837 flow [2023-09-01 01:55:29,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 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 01:55:29,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:29,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:29,338 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 01:55:29,531 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 01:55:29,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:29,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 305038088, now seen corresponding path program 1 times [2023-09-01 01:55:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:29,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786093771] [2023-09-01 01:55:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:29,532 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 01:55:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:29,533 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 01:55:29,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 01:55:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:55:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:29,604 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 01:55:29,661 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 01:55:29,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:29,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786093771] [2023-09-01 01:55:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786093771] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:55:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728158981] [2023-09-01 01:55:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:29,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-09-01 01:55:29,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 837 flow. Second operand has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 01:55:29,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:29,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-09-01 01:55:29,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:32,327 INFO L130 PetriNetUnfolder]: 12359/20942 cut-off events. [2023-09-01 01:55:32,327 INFO L131 PetriNetUnfolder]: For 17201/17201 co-relation queries the response was YES. [2023-09-01 01:55:32,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53314 conditions, 20942 events. 12359/20942 cut-off events. For 17201/17201 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 163633 event pairs, 5961 based on Foata normal form. 0/16566 useless extension candidates. Maximal degree in co-relation 53278. Up to 13968 conditions per place. [2023-09-01 01:55:32,398 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 151 selfloop transitions, 27 changer transitions 0/178 dead transitions. [2023-09-01 01:55:32,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 178 transitions, 1532 flow [2023-09-01 01:55:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1097 transitions. [2023-09-01 01:55:32,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370517928286853 [2023-09-01 01:55:32,400 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1097 transitions. [2023-09-01 01:55:32,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1097 transitions. [2023-09-01 01:55:32,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:32,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1097 transitions. [2023-09-01 01:55:32,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 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 01:55:32,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:32,405 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:32,405 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 837 flow. Second operand 5 states and 1097 transitions. [2023-09-01 01:55:32,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 178 transitions, 1532 flow [2023-09-01 01:55:32,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 178 transitions, 1517 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:55:32,457 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 887 flow [2023-09-01 01:55:32,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=887, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2023-09-01 01:55:32,457 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2023-09-01 01:55:32,457 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 887 flow [2023-09-01 01:55:32,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 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 01:55:32,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:32,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:32,466 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 01:55:32,664 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 01:55:32,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:32,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 305038210, now seen corresponding path program 1 times [2023-09-01 01:55:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197918205] [2023-09-01 01:55:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:32,665 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 01:55:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:32,666 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 01:55:32,666 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 01:55:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:55:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:32,780 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 01:55:32,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:32,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197918205] [2023-09-01 01:55:32,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197918205] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:32,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:32,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:55:32,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910465449] [2023-09-01 01:55:32,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:32,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:32,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:32,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:32,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 502 [2023-09-01 01:55:32,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 887 flow. Second operand has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 01:55:32,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:32,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 502 [2023-09-01 01:55:32,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:34,852 INFO L130 PetriNetUnfolder]: 11559/19662 cut-off events. [2023-09-01 01:55:34,852 INFO L131 PetriNetUnfolder]: For 19710/19710 co-relation queries the response was YES. [2023-09-01 01:55:34,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54364 conditions, 19662 events. 11559/19662 cut-off events. For 19710/19710 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 148929 event pairs, 8805 based on Foata normal form. 120/17492 useless extension candidates. Maximal degree in co-relation 54328. Up to 18488 conditions per place. [2023-09-01 01:55:34,943 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 158 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2023-09-01 01:55:34,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 162 transitions, 1433 flow [2023-09-01 01:55:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1111 transitions. [2023-09-01 01:55:34,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44262948207171315 [2023-09-01 01:55:34,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1111 transitions. [2023-09-01 01:55:34,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1111 transitions. [2023-09-01 01:55:34,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:34,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1111 transitions. [2023-09-01 01:55:34,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.2) internal successors, (1111), 5 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 01:55:34,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:34,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:34,950 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 887 flow. Second operand 5 states and 1111 transitions. [2023-09-01 01:55:34,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 162 transitions, 1433 flow [2023-09-01 01:55:35,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1369 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:55:35,027 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 857 flow [2023-09-01 01:55:35,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=857, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2023-09-01 01:55:35,027 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-09-01 01:55:35,027 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 857 flow [2023-09-01 01:55:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.6) internal successors, (1058), 5 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 01:55:35,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:35,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:35,034 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 01:55:35,228 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 01:55:35,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:35,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1117126715, now seen corresponding path program 1 times [2023-09-01 01:55:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:35,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648160637] [2023-09-01 01:55:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:35,229 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 01:55:35,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:35,230 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 01:55:35,232 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 01:55:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:55:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:35,328 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 01:55:35,416 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 01:55:35,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:35,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:35,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648160637] [2023-09-01 01:55:35,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648160637] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:35,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:35,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:55:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525218822] [2023-09-01 01:55:35,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:35,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:35,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:35,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 502 [2023-09-01 01:55:35,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 857 flow. Second operand has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:35,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:35,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 502 [2023-09-01 01:55:35,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:37,988 INFO L130 PetriNetUnfolder]: 11373/19338 cut-off events. [2023-09-01 01:55:37,988 INFO L131 PetriNetUnfolder]: For 23475/23475 co-relation queries the response was YES. [2023-09-01 01:55:38,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56003 conditions, 19338 events. 11373/19338 cut-off events. For 23475/23475 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 146837 event pairs, 8857 based on Foata normal form. 48/18700 useless extension candidates. Maximal degree in co-relation 55964. Up to 18978 conditions per place. [2023-09-01 01:55:38,067 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 125 selfloop transitions, 19 changer transitions 0/144 dead transitions. [2023-09-01 01:55:38,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 144 transitions, 1208 flow [2023-09-01 01:55:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1075 transitions. [2023-09-01 01:55:38,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828685258964144 [2023-09-01 01:55:38,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1075 transitions. [2023-09-01 01:55:38,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1075 transitions. [2023-09-01 01:55:38,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:38,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1075 transitions. [2023-09-01 01:55:38,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 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 01:55:38,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:38,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:38,074 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 857 flow. Second operand 5 states and 1075 transitions. [2023-09-01 01:55:38,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 144 transitions, 1208 flow [2023-09-01 01:55:38,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 144 transitions, 1199 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:55:38,141 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 897 flow [2023-09-01 01:55:38,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=897, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2023-09-01 01:55:38,141 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2023-09-01 01:55:38,141 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 897 flow [2023-09-01 01:55:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:38,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:38,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:38,348 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 01:55:38,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:38,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash 362890542, now seen corresponding path program 2 times [2023-09-01 01:55:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608745850] [2023-09-01 01:55:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:55:38,350 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 01:55:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:38,350 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 01:55:38,351 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 (19)] Waiting until timeout for monitored process [2023-09-01 01:55:38,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:55:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:55:38,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:55:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:38,469 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:55:38,470 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 01:55:38,506 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:55:38,506 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 01:55:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:38,551 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 01:55:38,557 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:55:38,557 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 01:55:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:55:38,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:55:38,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608745850] [2023-09-01 01:55:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608745850] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:55:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:55:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:55:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100972859] [2023-09-01 01:55:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:55:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:55:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:55:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:55:38,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-09-01 01:55:38,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 897 flow. Second operand has 5 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 01:55:38,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:38,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-09-01 01:55:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:40,916 INFO L130 PetriNetUnfolder]: 11121/18924 cut-off events. [2023-09-01 01:55:40,916 INFO L131 PetriNetUnfolder]: For 32748/32748 co-relation queries the response was YES. [2023-09-01 01:55:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57225 conditions, 18924 events. 11121/18924 cut-off events. For 32748/32748 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 143986 event pairs, 5021 based on Foata normal form. 162/18400 useless extension candidates. Maximal degree in co-relation 57185. Up to 11265 conditions per place. [2023-09-01 01:55:41,007 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 119 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2023-09-01 01:55:41,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 148 transitions, 1314 flow [2023-09-01 01:55:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:55:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:55:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-09-01 01:55:41,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294820717131474 [2023-09-01 01:55:41,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-09-01 01:55:41,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-09-01 01:55:41,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:41,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-09-01 01:55:41,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:55:41,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:41,012 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:55:41,012 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 897 flow. Second operand 5 states and 1078 transitions. [2023-09-01 01:55:41,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 148 transitions, 1314 flow [2023-09-01 01:55:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:55:41,077 INFO L231 Difference]: Finished difference. Result has 113 places, 123 transitions, 942 flow [2023-09-01 01:55:41,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=942, PETRI_PLACES=113, PETRI_TRANSITIONS=123} [2023-09-01 01:55:41,077 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2023-09-01 01:55:41,077 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 123 transitions, 942 flow [2023-09-01 01:55:41,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 01:55:41,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:41,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:41,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:55:41,280 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 01:55:41,280 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:41,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash -214044076, now seen corresponding path program 1 times [2023-09-01 01:55:41,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:41,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465789711] [2023-09-01 01:55:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:41,280 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 01:55:41,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:41,281 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 01:55:41,284 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 01:55:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:55:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:41,436 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:55:41,436 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 01:55:41,471 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:55:41,471 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 01:55:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:55:41,533 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 01:55:41,545 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:55:41,545 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 01:55:41,614 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 01:55:41,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:55:41,958 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 01:55:41,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:41,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465789711] [2023-09-01 01:55:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465789711] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:55:41,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:55:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 01:55:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814236643] [2023-09-01 01:55:41,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:55:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:55:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:55:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:55:44,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 502 [2023-09-01 01:55:44,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 123 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 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 01:55:44,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:44,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 502 [2023-09-01 01:55:44,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:54,399 INFO L130 PetriNetUnfolder]: 14640/24898 cut-off events. [2023-09-01 01:55:54,399 INFO L131 PetriNetUnfolder]: For 47188/47188 co-relation queries the response was YES. [2023-09-01 01:55:54,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77108 conditions, 24898 events. 14640/24898 cut-off events. For 47188/47188 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 195414 event pairs, 9368 based on Foata normal form. 716/24712 useless extension candidates. Maximal degree in co-relation 77067. Up to 6422 conditions per place. [2023-09-01 01:55:54,498 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 449 selfloop transitions, 54 changer transitions 0/503 dead transitions. [2023-09-01 01:55:54,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 503 transitions, 3644 flow [2023-09-01 01:55:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 01:55:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 01:55:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5599 transitions. [2023-09-01 01:55:54,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41308838719197283 [2023-09-01 01:55:54,503 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5599 transitions. [2023-09-01 01:55:54,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5599 transitions. [2023-09-01 01:55:54,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:54,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5599 transitions. [2023-09-01 01:55:54,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 207.37037037037038) internal successors, (5599), 27 states have internal predecessors, (5599), 0 states have call successors, (0), 0 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 01:55:54,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 502.0) internal successors, (14056), 28 states have internal predecessors, (14056), 0 states have call successors, (0), 0 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 01:55:54,515 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 502.0) internal successors, (14056), 28 states have internal predecessors, (14056), 0 states have call successors, (0), 0 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 01:55:54,516 INFO L175 Difference]: Start difference. First operand has 113 places, 123 transitions, 942 flow. Second operand 27 states and 5599 transitions. [2023-09-01 01:55:54,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 503 transitions, 3644 flow [2023-09-01 01:55:54,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 503 transitions, 3508 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-09-01 01:55:54,667 INFO L231 Difference]: Finished difference. Result has 140 places, 147 transitions, 1246 flow [2023-09-01 01:55:54,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1246, PETRI_PLACES=140, PETRI_TRANSITIONS=147} [2023-09-01 01:55:54,667 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2023-09-01 01:55:54,667 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 147 transitions, 1246 flow [2023-09-01 01:55:54,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 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 01:55:54,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:54,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:54,679 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 01:55:54,868 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 01:55:54,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:55:54,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:55:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash -215718893, now seen corresponding path program 1 times [2023-09-01 01:55:54,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:55:54,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996089464] [2023-09-01 01:55:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:55:54,869 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 01:55:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:55:54,870 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 01:55:54,871 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 01:55:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:55:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:55:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:55:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:55:55,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:55:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:55:55,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:55:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996089464] [2023-09-01 01:55:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996089464] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:55:55,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:55:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:55:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724796490] [2023-09-01 01:55:55,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:55:55,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:55:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:55:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:55:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:55:55,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 502 [2023-09-01 01:55:55,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 147 transitions, 1246 flow. Second operand has 12 states, 12 states have (on average 207.66666666666666) internal successors, (2492), 12 states have internal predecessors, (2492), 0 states have call successors, (0), 0 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 01:55:55,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:55:55,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 502 [2023-09-01 01:55:55,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:55:58,999 INFO L130 PetriNetUnfolder]: 13002/22396 cut-off events. [2023-09-01 01:55:58,999 INFO L131 PetriNetUnfolder]: For 69694/69694 co-relation queries the response was YES. [2023-09-01 01:55:59,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78279 conditions, 22396 events. 13002/22396 cut-off events. For 69694/69694 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 176020 event pairs, 8184 based on Foata normal form. 432/22072 useless extension candidates. Maximal degree in co-relation 78233. Up to 16420 conditions per place. [2023-09-01 01:55:59,121 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 217 selfloop transitions, 28 changer transitions 0/245 dead transitions. [2023-09-01 01:55:59,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 245 transitions, 2301 flow [2023-09-01 01:55:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:55:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:55:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2385 transitions. [2023-09-01 01:55:59,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43190872872147773 [2023-09-01 01:55:59,123 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2385 transitions. [2023-09-01 01:55:59,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2385 transitions. [2023-09-01 01:55:59,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:55:59,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2385 transitions. [2023-09-01 01:55:59,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.8181818181818) internal successors, (2385), 11 states have internal predecessors, (2385), 0 states have call successors, (0), 0 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 01:55:59,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 01:55:59,128 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 01:55:59,128 INFO L175 Difference]: Start difference. First operand has 140 places, 147 transitions, 1246 flow. Second operand 11 states and 2385 transitions. [2023-09-01 01:55:59,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 245 transitions, 2301 flow [2023-09-01 01:55:59,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 245 transitions, 2130 flow, removed 65 selfloop flow, removed 7 redundant places. [2023-09-01 01:55:59,834 INFO L231 Difference]: Finished difference. Result has 145 places, 147 transitions, 1272 flow [2023-09-01 01:55:59,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1272, PETRI_PLACES=145, PETRI_TRANSITIONS=147} [2023-09-01 01:55:59,834 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2023-09-01 01:55:59,834 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 147 transitions, 1272 flow [2023-09-01 01:55:59,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.66666666666666) internal successors, (2492), 12 states have internal predecessors, (2492), 0 states have call successors, (0), 0 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 01:55:59,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:55:59,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:55:59,844 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 01:56:00,042 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 01:56:00,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:56:00,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash -215721888, now seen corresponding path program 1 times [2023-09-01 01:56:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693092146] [2023-09-01 01:56:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:00,044 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 01:56:00,046 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 01:56:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:56:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:00,150 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 01:56:00,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:56:00,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693092146] [2023-09-01 01:56:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693092146] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:56:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:56:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:56:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058774265] [2023-09-01 01:56:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:56:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:56:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:56:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:56:00,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 502 [2023-09-01 01:56:00,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 147 transitions, 1272 flow. Second operand has 6 states, 6 states have (on average 208.66666666666666) internal successors, (1252), 6 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:00,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:00,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 502 [2023-09-01 01:56:00,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:03,031 INFO L130 PetriNetUnfolder]: 13879/23973 cut-off events. [2023-09-01 01:56:03,031 INFO L131 PetriNetUnfolder]: For 75442/75442 co-relation queries the response was YES. [2023-09-01 01:56:03,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81367 conditions, 23973 events. 13879/23973 cut-off events. For 75442/75442 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 193259 event pairs, 5340 based on Foata normal form. 0/23667 useless extension candidates. Maximal degree in co-relation 81319. Up to 12442 conditions per place. [2023-09-01 01:56:03,156 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 197 selfloop transitions, 38 changer transitions 0/235 dead transitions. [2023-09-01 01:56:03,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 235 transitions, 2329 flow [2023-09-01 01:56:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:56:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:56:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1104 transitions. [2023-09-01 01:56:03,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398406374501992 [2023-09-01 01:56:03,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1104 transitions. [2023-09-01 01:56:03,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1104 transitions. [2023-09-01 01:56:03,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:03,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1104 transitions. [2023-09-01 01:56:03,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.8) internal successors, (1104), 5 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 01:56:03,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:56:03,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 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 01:56:03,161 INFO L175 Difference]: Start difference. First operand has 145 places, 147 transitions, 1272 flow. Second operand 5 states and 1104 transitions. [2023-09-01 01:56:03,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 235 transitions, 2329 flow [2023-09-01 01:56:03,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 235 transitions, 2309 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:56:03,583 INFO L231 Difference]: Finished difference. Result has 148 places, 166 transitions, 1566 flow [2023-09-01 01:56:03,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1566, PETRI_PLACES=148, PETRI_TRANSITIONS=166} [2023-09-01 01:56:03,584 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2023-09-01 01:56:03,584 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 166 transitions, 1566 flow [2023-09-01 01:56:03,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.66666666666666) internal successors, (1252), 6 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:56:03,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:03,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:03,593 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 01:56:03,784 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 01:56:03,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:56:03,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:03,785 INFO L85 PathProgramCache]: Analyzing trace with hash 462089828, now seen corresponding path program 1 times [2023-09-01 01:56:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:03,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142790805] [2023-09-01 01:56:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:03,785 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 01:56:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:03,786 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 01:56:03,787 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 01:56:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:56:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:56:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:56:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:56:04,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:04,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142790805] [2023-09-01 01:56:04,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142790805] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:56:04,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:56:04,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:56:04,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505745619] [2023-09-01 01:56:04,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:56:04,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:56:04,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:56:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:56:04,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 502 [2023-09-01 01:56:04,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 166 transitions, 1566 flow. Second operand has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 01:56:04,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:04,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 502 [2023-09-01 01:56:04,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:08,001 INFO L130 PetriNetUnfolder]: 12835/22677 cut-off events. [2023-09-01 01:56:08,001 INFO L131 PetriNetUnfolder]: For 84899/84899 co-relation queries the response was YES. [2023-09-01 01:56:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82244 conditions, 22677 events. 12835/22677 cut-off events. For 84899/84899 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 185413 event pairs, 8471 based on Foata normal form. 864/23541 useless extension candidates. Maximal degree in co-relation 82193. Up to 17331 conditions per place. [2023-09-01 01:56:08,107 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 230 selfloop transitions, 31 changer transitions 0/261 dead transitions. [2023-09-01 01:56:08,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 261 transitions, 2581 flow [2023-09-01 01:56:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:56:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:56:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2380 transitions. [2023-09-01 01:56:08,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43100325968851866 [2023-09-01 01:56:08,110 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2380 transitions. [2023-09-01 01:56:08,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2380 transitions. [2023-09-01 01:56:08,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:08,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2380 transitions. [2023-09-01 01:56:08,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.36363636363637) internal successors, (2380), 11 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 01:56:08,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 01:56:08,115 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 502.0) internal successors, (6024), 12 states have internal predecessors, (6024), 0 states have call successors, (0), 0 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 01:56:08,115 INFO L175 Difference]: Start difference. First operand has 148 places, 166 transitions, 1566 flow. Second operand 11 states and 2380 transitions. [2023-09-01 01:56:08,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 261 transitions, 2581 flow [2023-09-01 01:56:08,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 261 transitions, 2499 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:56:08,831 INFO L231 Difference]: Finished difference. Result has 156 places, 166 transitions, 1592 flow [2023-09-01 01:56:08,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1592, PETRI_PLACES=156, PETRI_TRANSITIONS=166} [2023-09-01 01:56:08,832 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 102 predicate places. [2023-09-01 01:56:08,832 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 166 transitions, 1592 flow [2023-09-01 01:56:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 01:56:08,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:08,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:08,842 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 01:56:09,034 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 01:56:09,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:56:09,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1482713460, now seen corresponding path program 2 times [2023-09-01 01:56:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899419293] [2023-09-01 01:56:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:56:09,035 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 01:56:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:09,036 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 01:56:09,036 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 01:56:09,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:56:09,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:56:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:56:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:09,197 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:56:09,197 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 27 [2023-09-01 01:56:09,230 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 01:56:09,231 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 01:56:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:56:09,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:56:09,286 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:56:09,287 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 01:56:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:56:09,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:56:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:56:11,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899419293] [2023-09-01 01:56:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899419293] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:56:11,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:56:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:56:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284790452] [2023-09-01 01:56:11,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:56:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:56:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:56:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:56:15,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:56:19,554 WARN L539 Checker$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 01:56:21,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:56:26,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:56:30,667 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 01:56:31,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 502 [2023-09-01 01:56:31,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 166 transitions, 1592 flow. Second operand has 14 states, 14 states have (on average 191.57142857142858) internal successors, (2682), 14 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 01:56:31,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:31,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 502 [2023-09-01 01:56:31,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:37,635 INFO L130 PetriNetUnfolder]: 17281/30345 cut-off events. [2023-09-01 01:56:37,636 INFO L131 PetriNetUnfolder]: For 148156/148156 co-relation queries the response was YES. [2023-09-01 01:56:37,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113332 conditions, 30345 events. 17281/30345 cut-off events. For 148156/148156 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 255294 event pairs, 3834 based on Foata normal form. 306/30651 useless extension candidates. Maximal degree in co-relation 113280. Up to 6864 conditions per place. [2023-09-01 01:56:37,829 INFO L137 encePairwiseOnDemand]: 493/502 looper letters, 378 selfloop transitions, 59 changer transitions 0/437 dead transitions. [2023-09-01 01:56:37,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 437 transitions, 3905 flow [2023-09-01 01:56:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:56:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:56:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3510 transitions. [2023-09-01 01:56:37,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112959925005859 [2023-09-01 01:56:37,833 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3510 transitions. [2023-09-01 01:56:37,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3510 transitions. [2023-09-01 01:56:37,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:37,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3510 transitions. [2023-09-01 01:56:37,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 206.47058823529412) internal successors, (3510), 17 states have internal predecessors, (3510), 0 states have call successors, (0), 0 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 01:56:37,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 502.0) internal successors, (9036), 18 states have internal predecessors, (9036), 0 states have call successors, (0), 0 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 01:56:37,840 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 502.0) internal successors, (9036), 18 states have internal predecessors, (9036), 0 states have call successors, (0), 0 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 01:56:37,840 INFO L175 Difference]: Start difference. First operand has 156 places, 166 transitions, 1592 flow. Second operand 17 states and 3510 transitions. [2023-09-01 01:56:37,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 437 transitions, 3905 flow [2023-09-01 01:56:38,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 437 transitions, 3860 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 01:56:38,727 INFO L231 Difference]: Finished difference. Result has 171 places, 180 transitions, 1828 flow [2023-09-01 01:56:38,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1828, PETRI_PLACES=171, PETRI_TRANSITIONS=180} [2023-09-01 01:56:38,728 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2023-09-01 01:56:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 180 transitions, 1828 flow [2023-09-01 01:56:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 191.57142857142858) internal successors, (2682), 14 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 01:56:38,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:38,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:38,736 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 01:56:38,929 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 01:56:38,929 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:56:38,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1482713411, now seen corresponding path program 1 times [2023-09-01 01:56:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144418972] [2023-09-01 01:56:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:56:38,930 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 01:56:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:38,931 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 01:56:38,933 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 01:56:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:56:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:56:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:39,041 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 01:56:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:56:39,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:56:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:56:39,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144418972] [2023-09-01 01:56:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144418972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:56:39,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:56:39,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 01:56:39,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783134678] [2023-09-01 01:56:39,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:56:39,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:56:39,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:56:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:56:43,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 502 [2023-09-01 01:56:43,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 180 transitions, 1828 flow. Second operand has 12 states, 12 states have (on average 203.5) internal successors, (2442), 12 states have internal predecessors, (2442), 0 states have call successors, (0), 0 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 01:56:43,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:43,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 502 [2023-09-01 01:56:43,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:56:50,802 INFO L130 PetriNetUnfolder]: 23752/41208 cut-off events. [2023-09-01 01:56:50,802 INFO L131 PetriNetUnfolder]: For 227070/227070 co-relation queries the response was YES. [2023-09-01 01:56:50,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164093 conditions, 41208 events. 23752/41208 cut-off events. For 227070/227070 co-relation queries the response was YES. Maximal size of possible extension queue 1367. Compared 350499 event pairs, 2946 based on Foata normal form. 918/42126 useless extension candidates. Maximal degree in co-relation 164037. Up to 8363 conditions per place. [2023-09-01 01:56:51,139 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 285 selfloop transitions, 99 changer transitions 0/384 dead transitions. [2023-09-01 01:56:51,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 384 transitions, 4203 flow [2023-09-01 01:56:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:56:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:56:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2157 transitions. [2023-09-01 01:56:51,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296812749003984 [2023-09-01 01:56:51,142 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2157 transitions. [2023-09-01 01:56:51,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2157 transitions. [2023-09-01 01:56:51,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:56:51,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2157 transitions. [2023-09-01 01:56:51,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 215.7) internal successors, (2157), 10 states have internal predecessors, (2157), 0 states have call successors, (0), 0 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 01:56:51,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 502.0) internal successors, (5522), 11 states have internal predecessors, (5522), 0 states have call successors, (0), 0 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 01:56:51,147 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 502.0) internal successors, (5522), 11 states have internal predecessors, (5522), 0 states have call successors, (0), 0 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 01:56:51,147 INFO L175 Difference]: Start difference. First operand has 171 places, 180 transitions, 1828 flow. Second operand 10 states and 2157 transitions. [2023-09-01 01:56:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 384 transitions, 4203 flow [2023-09-01 01:56:52,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 384 transitions, 4115 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-09-01 01:56:52,764 INFO L231 Difference]: Finished difference. Result has 181 places, 212 transitions, 2481 flow [2023-09-01 01:56:52,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2481, PETRI_PLACES=181, PETRI_TRANSITIONS=212} [2023-09-01 01:56:52,765 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-09-01 01:56:52,765 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 212 transitions, 2481 flow [2023-09-01 01:56:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 203.5) internal successors, (2442), 12 states have internal predecessors, (2442), 0 states have call successors, (0), 0 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 01:56:52,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:56:52,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:56:52,773 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 01:56:52,965 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 01:56:52,966 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:56:52,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:56:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1643944291, now seen corresponding path program 2 times [2023-09-01 01:56:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:56:52,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450768820] [2023-09-01 01:56:52,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:56:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:56:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:56:52,967 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 01:56:52,968 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 01:56:53,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:56:53,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:56:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:56:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:56:53,103 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 01:56:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:56:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:56:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:56:53,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:56:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450768820] [2023-09-01 01:56:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450768820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:56:53,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:56:53,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 01:56:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767763692] [2023-09-01 01:56:53,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:56:53,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:56:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:56:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:56:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:56:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 502 [2023-09-01 01:56:56,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 212 transitions, 2481 flow. Second operand has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 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 01:56:56,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:56:56,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 502 [2023-09-01 01:56:56,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:03,768 INFO L130 PetriNetUnfolder]: 23365/40845 cut-off events. [2023-09-01 01:57:03,769 INFO L131 PetriNetUnfolder]: For 240742/240742 co-relation queries the response was YES. [2023-09-01 01:57:03,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172268 conditions, 40845 events. 23365/40845 cut-off events. For 240742/240742 co-relation queries the response was YES. Maximal size of possible extension queue 1401. Compared 354364 event pairs, 15008 based on Foata normal form. 376/41221 useless extension candidates. Maximal degree in co-relation 172210. Up to 32455 conditions per place. [2023-09-01 01:57:04,041 INFO L137 encePairwiseOnDemand]: 490/502 looper letters, 325 selfloop transitions, 55 changer transitions 0/380 dead transitions. [2023-09-01 01:57:04,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 380 transitions, 4616 flow [2023-09-01 01:57:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:57:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:57:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2479 transitions. [2023-09-01 01:57:04,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115205843293493 [2023-09-01 01:57:04,045 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2479 transitions. [2023-09-01 01:57:04,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2479 transitions. [2023-09-01 01:57:04,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:04,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2479 transitions. [2023-09-01 01:57:04,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.58333333333334) internal successors, (2479), 12 states have internal predecessors, (2479), 0 states have call successors, (0), 0 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 01:57:04,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 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 01:57:04,051 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 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 01:57:04,051 INFO L175 Difference]: Start difference. First operand has 181 places, 212 transitions, 2481 flow. Second operand 12 states and 2479 transitions. [2023-09-01 01:57:04,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 380 transitions, 4616 flow [2023-09-01 01:57:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 380 transitions, 4448 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-09-01 01:57:06,771 INFO L231 Difference]: Finished difference. Result has 193 places, 215 transitions, 2555 flow [2023-09-01 01:57:06,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2555, PETRI_PLACES=193, PETRI_TRANSITIONS=215} [2023-09-01 01:57:06,772 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 139 predicate places. [2023-09-01 01:57:06,772 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 215 transitions, 2555 flow [2023-09-01 01:57:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.83333333333334) internal successors, (2362), 12 states have internal predecessors, (2362), 0 states have call successors, (0), 0 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 01:57:06,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:06,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:06,782 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 01:57:06,973 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 01:57:06,973 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:57:06,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1332445124, now seen corresponding path program 1 times [2023-09-01 01:57:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337670108] [2023-09-01 01:57:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:06,974 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 01:57:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:06,975 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 01:57:06,976 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 01:57:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:57:07,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:07,082 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 01:57:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:57:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 01:57:07,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:07,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337670108] [2023-09-01 01:57:07,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337670108] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:07,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:57:07,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:57:07,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548619444] [2023-09-01 01:57:07,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:07,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:57:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:57:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:57:09,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-09-01 01:57:09,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 215 transitions, 2555 flow. Second operand has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 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 01:57:09,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:09,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-09-01 01:57:09,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:21,756 INFO L130 PetriNetUnfolder]: 42544/73084 cut-off events. [2023-09-01 01:57:21,756 INFO L131 PetriNetUnfolder]: For 500509/500509 co-relation queries the response was YES. [2023-09-01 01:57:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353073 conditions, 73084 events. 42544/73084 cut-off events. For 500509/500509 co-relation queries the response was YES. Maximal size of possible extension queue 2383. Compared 666527 event pairs, 9500 based on Foata normal form. 4796/77880 useless extension candidates. Maximal degree in co-relation 353010. Up to 22088 conditions per place. [2023-09-01 01:57:22,496 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 359 selfloop transitions, 98 changer transitions 0/457 dead transitions. [2023-09-01 01:57:22,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 457 transitions, 6010 flow [2023-09-01 01:57:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:57:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:57:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1751 transitions. [2023-09-01 01:57:22,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43600597609561753 [2023-09-01 01:57:22,500 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1751 transitions. [2023-09-01 01:57:22,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1751 transitions. [2023-09-01 01:57:22,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:22,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1751 transitions. [2023-09-01 01:57:22,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 218.875) internal successors, (1751), 8 states have internal predecessors, (1751), 0 states have call successors, (0), 0 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 01:57:22,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 502.0) internal successors, (4518), 9 states have internal predecessors, (4518), 0 states have call successors, (0), 0 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 01:57:22,503 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 502.0) internal successors, (4518), 9 states have internal predecessors, (4518), 0 states have call successors, (0), 0 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 01:57:22,503 INFO L175 Difference]: Start difference. First operand has 193 places, 215 transitions, 2555 flow. Second operand 8 states and 1751 transitions. [2023-09-01 01:57:22,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 457 transitions, 6010 flow [2023-09-01 01:57:31,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 457 transitions, 5942 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 01:57:31,385 INFO L231 Difference]: Finished difference. Result has 200 places, 230 transitions, 3076 flow [2023-09-01 01:57:31,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3076, PETRI_PLACES=200, PETRI_TRANSITIONS=230} [2023-09-01 01:57:31,386 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 146 predicate places. [2023-09-01 01:57:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 230 transitions, 3076 flow [2023-09-01 01:57:31,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 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 01:57:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:31,386 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 01:57:31,395 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 01:57:31,586 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 01:57:31,586 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 01:57:31,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2077282439, now seen corresponding path program 3 times [2023-09-01 01:57:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:57:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522411887] [2023-09-01 01:57:31,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:57:31,587 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 01:57:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:57:31,588 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 01:57:31,588 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 01:57:31,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:57:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:57:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:31,778 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 01:57:31,778 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 01:57:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:33,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:57:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522411887] [2023-09-01 01:57:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522411887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:33,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:57:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 01:57:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734647600] [2023-09-01 01:57:33,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 01:57:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:57:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 01:57:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 01:57:50,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 502 [2023-09-01 01:57:50,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 230 transitions, 3076 flow. Second operand has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 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 01:57:50,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:50,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 502 [2023-09-01 01:57:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:57,964 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 01:57:59,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:01,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:02,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:04,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:06,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:07,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:09,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:11,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:13,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:16,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:18,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:20,317 WARN L539 Checker$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 01:58:22,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:24,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:26,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:28,289 WARN L539 Checker$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 01:58:29,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:32,705 WARN L539 Checker$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 01:58:34,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:35,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:38,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:58:43,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 01:59:13,030 INFO L130 PetriNetUnfolder]: 87988/150642 cut-off events. [2023-09-01 01:59:13,030 INFO L131 PetriNetUnfolder]: For 1535240/1535240 co-relation queries the response was YES. [2023-09-01 01:59:14,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791139 conditions, 150642 events. 87988/150642 cut-off events. For 1535240/1535240 co-relation queries the response was YES. Maximal size of possible extension queue 3537. Compared 1451560 event pairs, 70032 based on Foata normal form. 40/150682 useless extension candidates. Maximal degree in co-relation 791073. Up to 39065 conditions per place. [2023-09-01 01:59:14,757 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 1479 selfloop transitions, 86 changer transitions 0/1565 dead transitions. [2023-09-01 01:59:14,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1565 transitions, 24143 flow [2023-09-01 01:59:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 01:59:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 01:59:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 6518 transitions. [2023-09-01 01:59:14,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772633603516965 [2023-09-01 01:59:14,765 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 6518 transitions. [2023-09-01 01:59:14,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 6518 transitions. [2023-09-01 01:59:14,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:14,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 6518 transitions. [2023-09-01 01:59:14,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 224.75862068965517) internal successors, (6518), 29 states have internal predecessors, (6518), 0 states have call successors, (0), 0 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 01:59:14,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 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 01:59:14,778 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 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 01:59:14,778 INFO L175 Difference]: Start difference. First operand has 200 places, 230 transitions, 3076 flow. Second operand 29 states and 6518 transitions. [2023-09-01 01:59:14,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1565 transitions, 24143 flow [2023-09-01 02:01:38,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1565 transitions, 21840 flow, removed 952 selfloop flow, removed 3 redundant places. [2023-09-01 02:01:38,049 INFO L231 Difference]: Finished difference. Result has 242 places, 275 transitions, 3745 flow [2023-09-01 02:01:38,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3745, PETRI_PLACES=242, PETRI_TRANSITIONS=275} [2023-09-01 02:01:38,050 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2023-09-01 02:01:38,050 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 275 transitions, 3745 flow [2023-09-01 02:01:38,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:38,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:38,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:38,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:01:38,251 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 02:01:38,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1041580959, now seen corresponding path program 3 times [2023-09-01 02:01:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:01:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698817269] [2023-09-01 02:01:38,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:01:38,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:01:38,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:01:38,252 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:01:38,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 02:01:38,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:01:38,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 02:01:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:38,415 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 02:01:38,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 02:01:38,453 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 02:01:38,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 02:01:38,548 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:01:38,549 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 02:01:38,556 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 21 treesize of output 21 [2023-09-01 02:01:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:01:38,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:01:41,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:01:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698817269] [2023-09-01 02:01:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698817269] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:41,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:01:41,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 02:01:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884012203] [2023-09-01 02:01:41,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:41,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:01:41,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:01:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:01:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:02:05,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:02:14,162 WARN L539 Checker$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 02:02:29,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 502 [2023-09-01 02:02:29,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 275 transitions, 3745 flow. Second operand has 16 states, 16 states have (on average 186.5) internal successors, (2984), 16 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:29,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:29,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 502 [2023-09-01 02:02:29,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:54,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:02:57,031 WARN L539 Checker$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 02:02:59,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:01,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:05,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:03:07,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:03:09,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:03:11,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:13,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:15,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:25,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:03:53,065 INFO L130 PetriNetUnfolder]: 89096/152809 cut-off events. [2023-09-01 02:03:53,066 INFO L131 PetriNetUnfolder]: For 1473983/1473983 co-relation queries the response was YES. [2023-09-01 02:03:54,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744455 conditions, 152809 events. 89096/152809 cut-off events. For 1473983/1473983 co-relation queries the response was YES. Maximal size of possible extension queue 3555. Compared 1479547 event pairs, 31067 based on Foata normal form. 118/152927 useless extension candidates. Maximal degree in co-relation 744371. Up to 59930 conditions per place. [2023-09-01 02:03:55,157 INFO L137 encePairwiseOnDemand]: 489/502 looper letters, 545 selfloop transitions, 149 changer transitions 1/695 dead transitions. [2023-09-01 02:03:55,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 695 transitions, 9119 flow [2023-09-01 02:03:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 02:03:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 02:03:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4936 transitions. [2023-09-01 02:03:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933067729083665 [2023-09-01 02:03:55,169 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4936 transitions. [2023-09-01 02:03:55,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4936 transitions. [2023-09-01 02:03:55,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:03:55,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4936 transitions. [2023-09-01 02:03:55,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 197.44) internal successors, (4936), 25 states have internal predecessors, (4936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:55,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 502.0) internal successors, (13052), 26 states have internal predecessors, (13052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:55,186 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 502.0) internal successors, (13052), 26 states have internal predecessors, (13052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:55,187 INFO L175 Difference]: Start difference. First operand has 242 places, 275 transitions, 3745 flow. Second operand 25 states and 4936 transitions. [2023-09-01 02:03:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 695 transitions, 9119 flow [2023-09-01 02:04:22,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 695 transitions, 8923 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-09-01 02:04:22,769 INFO L231 Difference]: Finished difference. Result has 265 places, 336 transitions, 4684 flow [2023-09-01 02:04:22,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4684, PETRI_PLACES=265, PETRI_TRANSITIONS=336} [2023-09-01 02:04:22,769 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 211 predicate places. [2023-09-01 02:04:22,769 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 336 transitions, 4684 flow [2023-09-01 02:04:22,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 186.5) internal successors, (2984), 16 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:22,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:04:22,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:04:22,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 02:04:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:04:22,973 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 02:04:22,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:04:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1833988864, now seen corresponding path program 1 times [2023-09-01 02:04:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:04:22,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681172] [2023-09-01 02:04:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:04:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:04:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:04:22,974 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:04:22,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 02:04:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:04:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:04:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:04:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:23,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:04:23,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:04:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681172] [2023-09-01 02:04:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681172] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:04:23,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:04:23,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:04:23,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142042958] [2023-09-01 02:04:23,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:04:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:04:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:04:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:04:23,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:04:23,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-09-01 02:04:23,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 336 transitions, 4684 flow. Second operand has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:23,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:04:23,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-09-01 02:04:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:04:57,751 INFO L130 PetriNetUnfolder]: 90571/157231 cut-off events. [2023-09-01 02:04:57,752 INFO L131 PetriNetUnfolder]: For 1592352/1592352 co-relation queries the response was YES. [2023-09-01 02:04:59,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787611 conditions, 157231 events. 90571/157231 cut-off events. For 1592352/1592352 co-relation queries the response was YES. Maximal size of possible extension queue 3673. Compared 1567973 event pairs, 70080 based on Foata normal form. 395/157626 useless extension candidates. Maximal degree in co-relation 787517. Up to 149483 conditions per place. [2023-09-01 02:05:00,292 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 357 selfloop transitions, 1 changer transitions 8/366 dead transitions. [2023-09-01 02:05:00,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 366 transitions, 5704 flow [2023-09-01 02:05:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:05:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:05:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 886 transitions. [2023-09-01 02:05:00,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44123505976095617 [2023-09-01 02:05:00,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 886 transitions. [2023-09-01 02:05:00,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 886 transitions. [2023-09-01 02:05:00,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:05:00,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 886 transitions. [2023-09-01 02:05:00,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:00,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:00,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:00,297 INFO L175 Difference]: Start difference. First operand has 265 places, 336 transitions, 4684 flow. Second operand 4 states and 886 transitions. [2023-09-01 02:05:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 366 transitions, 5704 flow [2023-09-01 02:05:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 366 transitions, 5612 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-09-01 02:05:29,009 INFO L231 Difference]: Finished difference. Result has 265 places, 336 transitions, 4629 flow [2023-09-01 02:05:29,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4629, PETRI_PLACES=265, PETRI_TRANSITIONS=336} [2023-09-01 02:05:29,010 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 211 predicate places. [2023-09-01 02:05:29,010 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 336 transitions, 4629 flow [2023-09-01 02:05:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:29,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:05:29,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:05:29,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 02:05:29,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:05:29,215 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-09-01 02:05:29,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:05:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1519655710, now seen corresponding path program 2 times [2023-09-01 02:05:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:05:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753198449] [2023-09-01 02:05:29,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:05:29,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:05:29,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:05:29,216 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:05:29,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 02:05:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:05:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:05:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:05:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:05:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:05:29,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:05:29,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:05:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753198449] [2023-09-01 02:05:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753198449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:05:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:05:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:05:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294636498] [2023-09-01 02:05:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:05:29,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:05:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:05:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:05:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:05:29,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 502 [2023-09-01 02:05:29,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 336 transitions, 4629 flow. Second operand has 4 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:29,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:05:29,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 502 [2023-09-01 02:05:29,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand