./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:39:31,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:31,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:31,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:31,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:31,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:31,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:31,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:31,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:31,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:31,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:31,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:31,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:31,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:31,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:31,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:31,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:31,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:31,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:31,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:31,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:31,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:31,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:31,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:31,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:31,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:31,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:31,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:31,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:31,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:31,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:31,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:31,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:31,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:31,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:31,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:31,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:31,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:31,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:31,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:31,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:31,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:39:31,418 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:31,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:31,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:31,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:31,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:31,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:31,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:31,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:31,421 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:31,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:31,422 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:31,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:31,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:31,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:31,424 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:31,424 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:31,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:31,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:31,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:31,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:31,425 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:31,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:31,426 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:31,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:31,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:31,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:31,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:31,662 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:31,663 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:31,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 06:39:32,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:32,779 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:32,779 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 06:39:32,783 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2289a0259/51cb4d8c663340b9ae44d5edac143833/FLAGbfd1d5167 [2023-08-30 06:39:32,794 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2289a0259/51cb4d8c663340b9ae44d5edac143833 [2023-08-30 06:39:32,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:32,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:32,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:32,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:32,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:32,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:32" (1/1) ... [2023-08-30 06:39:32,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328bc356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:32, skipping insertion in model container [2023-08-30 06:39:32,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:32" (1/1) ... [2023-08-30 06:39:32,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:32,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:32,955 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 06:39:32,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:32,979 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:39:32,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@524e0ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:32, skipping insertion in model container [2023-08-30 06:39:32,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:32,982 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:39:32,983 INFO L158 Benchmark]: Toolchain (without parser) took 186.16ms. Allocated memory is still 96.5MB. Free memory was 74.7MB in the beginning and 64.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:39:32,983 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 65.0MB. Free memory was 43.1MB in the beginning and 43.1MB in the end (delta: 57.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:39:32,984 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.00ms. Allocated memory is still 96.5MB. Free memory was 74.4MB in the beginning and 64.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:39:32,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 65.0MB. Free memory was 43.1MB in the beginning and 43.1MB in the end (delta: 57.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.00ms. Allocated memory is still 96.5MB. Free memory was 74.4MB in the beginning and 64.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:39:34,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:34,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:34,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:34,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:34,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:34,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:34,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:34,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:34,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:34,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:34,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:34,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:34,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:34,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:34,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:34,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:34,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:34,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:34,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:34,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:34,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:34,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:34,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:34,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:34,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:34,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:34,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:34,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:34,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:34,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:34,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:34,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:34,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:34,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:34,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:34,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:34,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:34,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:34,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:34,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:34,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:39:34,624 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:34,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:34,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:34,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:34,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:34,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:34,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:34,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:34,627 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:34,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:34,628 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:34,629 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:34,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:34,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:34,630 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:39:34,630 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:39:34,633 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:34,633 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:34,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:34,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:34,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:34,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:34,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:34,635 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:39:34,636 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:34,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:34,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:34,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:34,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:34,871 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:34,871 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:34,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 06:39:35,819 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:35,996 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:35,996 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-08-30 06:39:36,002 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2eca9ba/92759ca08b324bc7bac3a21fc5ffa1ad/FLAG7956f5685 [2023-08-30 06:39:36,018 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2eca9ba/92759ca08b324bc7bac3a21fc5ffa1ad [2023-08-30 06:39:36,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:36,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:36,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:36,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:36,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:36,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77567b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36, skipping insertion in model container [2023-08-30 06:39:36,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:36,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:36,215 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 06:39:36,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:36,239 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:39:36,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:36,267 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 06:39:36,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:36,275 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:39:36,289 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-08-30 06:39:36,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:36,297 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:36,297 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:36,302 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:39:36,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36 WrapperNode [2023-08-30 06:39:36,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:36,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:36,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:39:36,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:39:36,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,380 INFO L138 Inliner]: procedures = 29, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 301 [2023-08-30 06:39:36,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:36,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:39:36,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:39:36,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:39:36,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:39:36,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:39:36,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:39:36,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:39:36,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (1/1) ... [2023-08-30 06:39:36,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:39:36,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:39:36,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:39:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:39:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:39:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:39:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:39:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:39:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:39:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:39:36,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:39:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:39:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:39:36,489 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:39:36,620 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:39:36,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:39:37,110 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:39:37,279 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:39:37,280 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:39:37,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:37 BoogieIcfgContainer [2023-08-30 06:39:37,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:39:37,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:39:37,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:39:37,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:39:37,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:39:36" (1/3) ... [2023-08-30 06:39:37,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616ea65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:37, skipping insertion in model container [2023-08-30 06:39:37,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:36" (2/3) ... [2023-08-30 06:39:37,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616ea65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:37, skipping insertion in model container [2023-08-30 06:39:37,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:37" (3/3) ... [2023-08-30 06:39:37,292 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-08-30 06:39:37,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:39:37,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:39:37,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:39:37,367 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:39:37,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 244 transitions, 520 flow [2023-08-30 06:39:37,473 INFO L130 PetriNetUnfolder]: 18/240 cut-off events. [2023-08-30 06:39:37,473 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:39:37,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 240 events. 18/240 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 221 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 190. Up to 2 conditions per place. [2023-08-30 06:39:37,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 244 transitions, 520 flow [2023-08-30 06:39:37,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 236 transitions, 496 flow [2023-08-30 06:39:37,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:39:37,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 236 transitions, 496 flow [2023-08-30 06:39:37,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 236 transitions, 496 flow [2023-08-30 06:39:37,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 236 transitions, 496 flow [2023-08-30 06:39:37,529 INFO L130 PetriNetUnfolder]: 18/236 cut-off events. [2023-08-30 06:39:37,529 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:39:37,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 236 events. 18/236 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 217 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 190. Up to 2 conditions per place. [2023-08-30 06:39:37,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 06:39:59,503 INFO L134 LiptonReduction]: Checked pairs total: 5098 [2023-08-30 06:39:59,504 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-30 06:39:59,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:39:59,517 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;@2a20c503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:39:59,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-30 06:39:59,518 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:39:59,518 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:39:59,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:59,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:39:59,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:39:59,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:59,522 INFO L85 PathProgramCache]: Analyzing trace with hash 36342, now seen corresponding path program 1 times [2023-08-30 06:39:59,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:59,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26098163] [2023-08-30 06:39:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:39:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:59,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:39:59,535 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 (2)] Waiting until timeout for monitored process [2023-08-30 06:39:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:39:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:59,807 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:39:59,808 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:39:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:59,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:59,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26098163] [2023-08-30 06:39:59,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26098163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:59,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:59,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:59,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958797549] [2023-08-30 06:39:59,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:59,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:59,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2023-08-30 06:39:59,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:59,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:59,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2023-08-30 06:39:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:01,730 INFO L130 PetriNetUnfolder]: 15622/19521 cut-off events. [2023-08-30 06:40:01,730 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-08-30 06:40:01,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39211 conditions, 19521 events. 15622/19521 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 95764 event pairs, 10109 based on Foata normal form. 0/5199 useless extension candidates. Maximal degree in co-relation 34231. Up to 19216 conditions per place. [2023-08-30 06:40:01,862 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 54 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 06:40:01,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 256 flow [2023-08-30 06:40:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 06:40:01,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 06:40:01,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 06:40:01,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 06:40:01,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:01,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 06:40:01,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:01,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:01,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:01,894 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 655 transitions. [2023-08-30 06:40:01,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 256 flow [2023-08-30 06:40:01,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:40:01,910 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 132 flow [2023-08-30 06:40:01,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-30 06:40:01,914 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-30 06:40:01,914 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 132 flow [2023-08-30 06:40:01,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:01,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:01,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:40:01,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:02,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:02,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 36344, now seen corresponding path program 1 times [2023-08-30 06:40:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:02,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144631426] [2023-08-30 06:40:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:02,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:02,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:02,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:40:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:40:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:02,347 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:40:02,347 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:40:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:02,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:02,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:02,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144631426] [2023-08-30 06:40:02,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144631426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:02,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:02,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780389565] [2023-08-30 06:40:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:02,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:02,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:02,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2023-08-30 06:40:02,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:02,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:02,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2023-08-30 06:40:02,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:05,433 INFO L130 PetriNetUnfolder]: 31233/39029 cut-off events. [2023-08-30 06:40:05,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:40:05,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77763 conditions, 39029 events. 31233/39029 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 207096 event pairs, 20215 based on Foata normal form. 0/10773 useless extension candidates. Maximal degree in co-relation 77757. Up to 19213 conditions per place. [2023-08-30 06:40:05,632 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 103 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-30 06:40:05,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 458 flow [2023-08-30 06:40:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2023-08-30 06:40:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48824343015214383 [2023-08-30 06:40:05,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2023-08-30 06:40:05,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2023-08-30 06:40:05,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:05,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2023-08-30 06:40:05,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:05,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:05,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:05,748 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 132 flow. Second operand 3 states and 706 transitions. [2023-08-30 06:40:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 458 flow [2023-08-30 06:40:05,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 113 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:05,751 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 163 flow [2023-08-30 06:40:05,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-08-30 06:40:05,751 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-08-30 06:40:05,751 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 163 flow [2023-08-30 06:40:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:05,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:40:05,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:05,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:05,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:05,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1129497, now seen corresponding path program 1 times [2023-08-30 06:40:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495523103] [2023-08-30 06:40:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:05,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:40:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:40:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:06,165 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:40:06,165 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:40:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:06,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:06,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495523103] [2023-08-30 06:40:06,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495523103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:06,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:40:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216358523] [2023-08-30 06:40:06,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:40:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:40:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:40:06,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 482 [2023-08-30 06:40:06,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:06,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:06,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 482 [2023-08-30 06:40:06,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:12,007 INFO L130 PetriNetUnfolder]: 46852/58549 cut-off events. [2023-08-30 06:40:12,008 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:40:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116679 conditions, 58549 events. 46852/58549 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3758. Compared 323575 event pairs, 30321 based on Foata normal form. 0/16361 useless extension candidates. Maximal degree in co-relation 116670. Up to 19216 conditions per place. [2023-08-30 06:40:12,291 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2023-08-30 06:40:12,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 177 transitions, 771 flow [2023-08-30 06:40:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:40:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:40:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1311 transitions. [2023-08-30 06:40:12,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533195020746888 [2023-08-30 06:40:12,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1311 transitions. [2023-08-30 06:40:12,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1311 transitions. [2023-08-30 06:40:12,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:12,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1311 transitions. [2023-08-30 06:40:12,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:12,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:12,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:12,318 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 163 flow. Second operand 6 states and 1311 transitions. [2023-08-30 06:40:12,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 177 transitions, 771 flow [2023-08-30 06:40:12,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:40:12,322 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2023-08-30 06:40:12,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-30 06:40:12,323 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-08-30 06:40:12,323 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2023-08-30 06:40:12,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:12,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:12,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:40:12,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:12,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:12,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:12,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1130994, now seen corresponding path program 1 times [2023-08-30 06:40:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780350537] [2023-08-30 06:40:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:12,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:12,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:40:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:40:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,744 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:40:12,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:40:12,785 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 06:40:12,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 160 [2023-08-30 06:40:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:12,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:40:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:12,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:12,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780350537] [2023-08-30 06:40:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780350537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:40:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745508764] [2023-08-30 06:40:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:40:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:40:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:40:13,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 06:40:13,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:13,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:13,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 06:40:13,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:16,731 INFO L130 PetriNetUnfolder]: 37870/47689 cut-off events. [2023-08-30 06:40:16,731 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:40:16,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95009 conditions, 47689 events. 37870/47689 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3006. Compared 263438 event pairs, 24327 based on Foata normal form. 0/13735 useless extension candidates. Maximal degree in co-relation 94996. Up to 46774 conditions per place. [2023-08-30 06:40:16,962 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-30 06:40:16,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2023-08-30 06:40:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2023-08-30 06:40:16,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612724757952974 [2023-08-30 06:40:16,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2023-08-30 06:40:16,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2023-08-30 06:40:16,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:16,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2023-08-30 06:40:16,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:16,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:16,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:16,971 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 667 transitions. [2023-08-30 06:40:16,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2023-08-30 06:40:16,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:16,976 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2023-08-30 06:40:16,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-30 06:40:16,978 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-30 06:40:16,978 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2023-08-30 06:40:16,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:16,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:16,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:40:16,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:17,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:17,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1130993, now seen corresponding path program 1 times [2023-08-30 06:40:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778427236] [2023-08-30 06:40:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:17,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:17,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:17,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:40:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:40:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:17,357 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 06:40:17,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-30 06:40:18,228 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-08-30 06:40:18,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 06:40:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:18,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:18,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:18,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778427236] [2023-08-30 06:40:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778427236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:18,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143734794] [2023-08-30 06:40:18,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:19,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 06:40:19,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:19,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:19,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 06:40:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:22,265 INFO L130 PetriNetUnfolder]: 28868/36809 cut-off events. [2023-08-30 06:40:22,265 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:40:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73230 conditions, 36809 events. 28868/36809 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 203632 event pairs, 18327 based on Foata normal form. 0/11860 useless extension candidates. Maximal degree in co-relation 73216. Up to 35894 conditions per place. [2023-08-30 06:40:22,398 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-30 06:40:22,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2023-08-30 06:40:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-30 06:40:22,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557399723374827 [2023-08-30 06:40:22,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-30 06:40:22,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-30 06:40:22,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:22,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-30 06:40:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:22,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:22,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:22,405 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 659 transitions. [2023-08-30 06:40:22,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2023-08-30 06:40:22,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:22,406 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2023-08-30 06:40:22,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 06:40:22,407 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-08-30 06:40:22,407 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2023-08-30 06:40:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:22,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:22,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:40:22,417 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 [2023-08-30 06:40:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:22,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:22,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1086914067, now seen corresponding path program 1 times [2023-08-30 06:40:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113860233] [2023-08-30 06:40:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:22,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:22,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:22,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:22,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:40:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:40:22,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,790 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 06:40:22,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 06:40:22,810 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:40:22,810 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 31 treesize of output 27 [2023-08-30 06:40:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:22,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:40:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:22,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:22,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113860233] [2023-08-30 06:40:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113860233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:40:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395418685] [2023-08-30 06:40:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:40:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:40:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:40:23,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 06:40:23,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:23,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:23,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 06:40:23,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:25,508 INFO L130 PetriNetUnfolder]: 27647/35198 cut-off events. [2023-08-30 06:40:25,508 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:40:25,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70009 conditions, 35198 events. 27647/35198 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 192823 event pairs, 17418 based on Foata normal form. 0/11557 useless extension candidates. Maximal degree in co-relation 69994. Up to 34283 conditions per place. [2023-08-30 06:40:25,669 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-30 06:40:25,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2023-08-30 06:40:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-08-30 06:40:25,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45850622406639 [2023-08-30 06:40:25,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-08-30 06:40:25,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-08-30 06:40:25,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:25,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-08-30 06:40:25,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:25,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:25,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:25,675 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 663 transitions. [2023-08-30 06:40:25,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2023-08-30 06:40:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:25,677 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2023-08-30 06:40:25,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-30 06:40:25,677 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-30 06:40:25,678 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2023-08-30 06:40:25,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:25,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:25,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:40:25,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:25,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:25,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1086914066, now seen corresponding path program 1 times [2023-08-30 06:40:25,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:25,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888877774] [2023-08-30 06:40:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:25,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:25,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:40:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:40:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:26,072 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:40:26,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-30 06:40:26,285 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:40:26,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:40:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:26,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:26,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888877774] [2023-08-30 06:40:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888877774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:26,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118557285] [2023-08-30 06:40:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:26,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 06:40:26,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:26,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:26,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 06:40:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:28,824 INFO L130 PetriNetUnfolder]: 26426/33587 cut-off events. [2023-08-30 06:40:28,824 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:40:28,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66788 conditions, 33587 events. 26426/33587 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 182382 event pairs, 16509 based on Foata normal form. 0/11254 useless extension candidates. Maximal degree in co-relation 66772. Up to 32672 conditions per place. [2023-08-30 06:40:28,967 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 06:40:28,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2023-08-30 06:40:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 06:40:28,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 06:40:28,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 06:40:28,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 06:40:28,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:28,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 06:40:28,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:28,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:28,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:28,972 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 655 transitions. [2023-08-30 06:40:28,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2023-08-30 06:40:28,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:28,974 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2023-08-30 06:40:28,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 06:40:28,974 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 06:40:28,975 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2023-08-30 06:40:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:28,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:28,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:40:28,981 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 (8)] Ended with exit code 0 [2023-08-30 06:40:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:29,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:29,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -665408690, now seen corresponding path program 1 times [2023-08-30 06:40:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:29,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487000845] [2023-08-30 06:40:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:29,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:29,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:40:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:40:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:29,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:29,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:29,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487000845] [2023-08-30 06:40:29,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487000845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:29,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:29,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:40:29,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705398258] [2023-08-30 06:40:29,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:40:29,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:29,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:40:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:40:29,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2023-08-30 06:40:29,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:29,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:29,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2023-08-30 06:40:29,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:32,020 INFO L130 PetriNetUnfolder]: 30118/38839 cut-off events. [2023-08-30 06:40:32,020 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 06:40:32,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77254 conditions, 38839 events. 30118/38839 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 221197 event pairs, 19170 based on Foata normal form. 0/14445 useless extension candidates. Maximal degree in co-relation 77237. Up to 32638 conditions per place. [2023-08-30 06:40:32,168 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 101 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 06:40:32,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 580 flow [2023-08-30 06:40:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:40:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:40:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-08-30 06:40:32,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46473029045643155 [2023-08-30 06:40:32,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-08-30 06:40:32,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-08-30 06:40:32,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:32,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-08-30 06:40:32,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:32,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:32,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:32,175 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 4 states and 896 transitions. [2023-08-30 06:40:32,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 580 flow [2023-08-30 06:40:32,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:32,177 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 256 flow [2023-08-30 06:40:32,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-30 06:40:32,177 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-30 06:40:32,178 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 256 flow [2023-08-30 06:40:32,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:32,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:32,178 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:40:32,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:40:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:32,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:40:32,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -708080072, now seen corresponding path program 2 times [2023-08-30 06:40:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162616299] [2023-08-30 06:40:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:40:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:40:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:32,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:40:32,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:40:32,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:40:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:40:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:40:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:32,573 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:40:32,573 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:40:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:32,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:40:33,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:33,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162616299] [2023-08-30 06:40:33,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162616299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:33,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:33,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:40:33,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726046696] [2023-08-30 06:40:33,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:40:33,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:40:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:40:36,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 482 [2023-08-30 06:40:36,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 256 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:36,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:36,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 482 [2023-08-30 06:40:36,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:38,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:39,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:43,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:44,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:46,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:59,180 INFO L130 PetriNetUnfolder]: 100474/129520 cut-off events. [2023-08-30 06:40:59,181 INFO L131 PetriNetUnfolder]: For 11219/11219 co-relation queries the response was YES. [2023-08-30 06:40:59,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292372 conditions, 129520 events. 100474/129520 cut-off events. For 11219/11219 co-relation queries the response was YES. Maximal size of possible extension queue 5467. Compared 818740 event pairs, 63930 based on Foata normal form. 18/59823 useless extension candidates. Maximal degree in co-relation 292353. Up to 34861 conditions per place. [2023-08-30 06:40:59,914 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 415 selfloop transitions, 32 changer transitions 0/453 dead transitions. [2023-08-30 06:40:59,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 453 transitions, 2206 flow [2023-08-30 06:40:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:40:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:40:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2751 transitions. [2023-08-30 06:40:59,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756224066390041 [2023-08-30 06:40:59,922 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2751 transitions. [2023-08-30 06:40:59,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2751 transitions. [2023-08-30 06:40:59,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:59,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2751 transitions. [2023-08-30 06:40:59,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.25) internal successors, (2751), 12 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:59,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:59,937 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:59,938 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 256 flow. Second operand 12 states and 2751 transitions. [2023-08-30 06:40:59,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 453 transitions, 2206 flow [2023-08-30 06:40:59,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 453 transitions, 2200 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:59,950 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 494 flow [2023-08-30 06:40:59,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-30 06:40:59,951 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-08-30 06:40:59,951 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 494 flow [2023-08-30 06:40:59,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:59,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:59,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:59,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:41:00,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:00,157 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:41:00,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash 847394181, now seen corresponding path program 1 times [2023-08-30 06:41:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:00,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543615581] [2023-08-30 06:41:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:00,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:00,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:00,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:41:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:41:00,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:00,354 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-08-30 06:41:00,354 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 5 case distinctions, treesize of input 36 treesize of output 63 [2023-08-30 06:41:00,724 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2023-08-30 06:41:00,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2023-08-30 06:41:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:41:00,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:00,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543615581] [2023-08-30 06:41:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543615581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:00,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:41:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728747862] [2023-08-30 06:41:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:41:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:41:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:41:01,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 06:41:01,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:01,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:01,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 06:41:01,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:11,390 INFO L130 PetriNetUnfolder]: 98994/127340 cut-off events. [2023-08-30 06:41:11,390 INFO L131 PetriNetUnfolder]: For 11232/11232 co-relation queries the response was YES. [2023-08-30 06:41:11,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287669 conditions, 127340 events. 98994/127340 cut-off events. For 11232/11232 co-relation queries the response was YES. Maximal size of possible extension queue 5078. Compared 799636 event pairs, 62930 based on Foata normal form. 0/57869 useless extension candidates. Maximal degree in co-relation 287642. Up to 123760 conditions per place. [2023-08-30 06:41:12,305 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 06:41:12,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 646 flow [2023-08-30 06:41:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:41:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:41:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-30 06:41:12,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515905947441217 [2023-08-30 06:41:12,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-30 06:41:12,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-30 06:41:12,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:12,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-30 06:41:12,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,311 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 494 flow. Second operand 3 states and 653 transitions. [2023-08-30 06:41:12,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 646 flow [2023-08-30 06:41:12,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 587 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 06:41:12,318 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 433 flow [2023-08-30 06:41:12,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=433, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-30 06:41:12,318 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-08-30 06:41:12,318 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 433 flow [2023-08-30 06:41:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:12,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:12,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:41:12,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:12,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:41:12,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -432971537, now seen corresponding path program 1 times [2023-08-30 06:41:12,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:12,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959189058] [2023-08-30 06:41:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:12,521 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:12,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:41:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:12,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:41:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:12,694 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:41:12,694 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:41:12,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:41:12,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:41:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:41:12,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:12,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:12,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959189058] [2023-08-30 06:41:12,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959189058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:12,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:12,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:41:12,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072986565] [2023-08-30 06:41:12,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:41:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:12,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:41:12,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:41:12,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 482 [2023-08-30 06:41:12,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 433 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:12,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:12,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 482 [2023-08-30 06:41:12,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:20,076 INFO L130 PetriNetUnfolder]: 67784/88510 cut-off events. [2023-08-30 06:41:20,077 INFO L131 PetriNetUnfolder]: For 9251/9251 co-relation queries the response was YES. [2023-08-30 06:41:20,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194784 conditions, 88510 events. 67784/88510 cut-off events. For 9251/9251 co-relation queries the response was YES. Maximal size of possible extension queue 3628. Compared 559432 event pairs, 43510 based on Foata normal form. 0/45450 useless extension candidates. Maximal degree in co-relation 194756. Up to 85927 conditions per place. [2023-08-30 06:41:20,593 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 64 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2023-08-30 06:41:20,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 577 flow [2023-08-30 06:41:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:41:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:41:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 833 transitions. [2023-08-30 06:41:20,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320539419087137 [2023-08-30 06:41:20,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 833 transitions. [2023-08-30 06:41:20,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 833 transitions. [2023-08-30 06:41:20,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:20,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 833 transitions. [2023-08-30 06:41:20,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:20,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:20,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:20,599 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 433 flow. Second operand 4 states and 833 transitions. [2023-08-30 06:41:20,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 577 flow [2023-08-30 06:41:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:41:20,606 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 448 flow [2023-08-30 06:41:20,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=448, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-30 06:41:20,607 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-08-30 06:41:20,607 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 448 flow [2023-08-30 06:41:20,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:20,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:20,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:20,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:41:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:20,814 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:41:20,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash -432971536, now seen corresponding path program 1 times [2023-08-30 06:41:20,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571649045] [2023-08-30 06:41:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:20,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:41:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:20,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:41:20,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:41:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:41:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:21,047 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:41:21,047 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 06:41:21,189 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:41:21,189 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 06:41:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:21,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:41:21,301 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:41:21,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:41:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:41:21,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:41:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:41:24,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571649045] [2023-08-30 06:41:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571649045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:41:24,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:41:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:41:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070123207] [2023-08-30 06:41:24,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:41:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:41:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:41:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:41:33,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 482 [2023-08-30 06:41:33,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 448 flow. Second operand has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:33,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:33,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 482 [2023-08-30 06:41:33,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:39,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:41:46,157 WARN L222 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:41:57,715 WARN L222 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:42:16,811 INFO L130 PetriNetUnfolder]: 130276/170206 cut-off events. [2023-08-30 06:42:16,812 INFO L131 PetriNetUnfolder]: For 23572/23572 co-relation queries the response was YES. [2023-08-30 06:42:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371620 conditions, 170206 events. 130276/170206 cut-off events. For 23572/23572 co-relation queries the response was YES. Maximal size of possible extension queue 6306. Compared 1139690 event pairs, 82770 based on Foata normal form. 0/98025 useless extension candidates. Maximal degree in co-relation 371591. Up to 69271 conditions per place. [2023-08-30 06:42:17,934 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 217 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2023-08-30 06:42:17,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 252 transitions, 1534 flow [2023-08-30 06:42:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:42:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:42:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2888 transitions. [2023-08-30 06:42:17,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944674965421856 [2023-08-30 06:42:17,941 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2888 transitions. [2023-08-30 06:42:17,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2888 transitions. [2023-08-30 06:42:17,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:17,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2888 transitions. [2023-08-30 06:42:17,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 192.53333333333333) internal successors, (2888), 15 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:17,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:17,951 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 482.0) internal successors, (7712), 16 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:17,952 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 448 flow. Second operand 15 states and 2888 transitions. [2023-08-30 06:42:17,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 252 transitions, 1534 flow [2023-08-30 06:42:17,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 252 transitions, 1521 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:42:17,965 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 666 flow [2023-08-30 06:42:17,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=666, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2023-08-30 06:42:17,966 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2023-08-30 06:42:17,966 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 666 flow [2023-08-30 06:42:17,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:17,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:17,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:17,973 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 (13)] Ended with exit code 0 [2023-08-30 06:42:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:18,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:42:18,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 847394182, now seen corresponding path program 1 times [2023-08-30 06:42:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073379849] [2023-08-30 06:42:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:18,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:18,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:42:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:42:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:18,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:18,448 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2023-08-30 06:42:18,448 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 3 case distinctions, treesize of input 18 treesize of output 53 [2023-08-30 06:42:18,465 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 120 treesize of output 116 [2023-08-30 06:42:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:18,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:42:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:42:18,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:18,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073379849] [2023-08-30 06:42:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073379849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:18,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:18,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73351428] [2023-08-30 06:42:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:18,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 482 [2023-08-30 06:42:18,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:18,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:18,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 482 [2023-08-30 06:42:18,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:33,662 INFO L130 PetriNetUnfolder]: 127926/166656 cut-off events. [2023-08-30 06:42:33,663 INFO L131 PetriNetUnfolder]: For 113791/113791 co-relation queries the response was YES. [2023-08-30 06:42:34,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391706 conditions, 166656 events. 127926/166656 cut-off events. For 113791/113791 co-relation queries the response was YES. Maximal size of possible extension queue 6497. Compared 1111380 event pairs, 81140 based on Foata normal form. 0/103986 useless extension candidates. Maximal degree in co-relation 391672. Up to 161626 conditions per place. [2023-08-30 06:42:34,863 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 89 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 06:42:34,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 96 transitions, 842 flow [2023-08-30 06:42:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:42:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:42:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 06:42:34,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529737206085754 [2023-08-30 06:42:34,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 06:42:34,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 06:42:34,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:34,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 06:42:34,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,868 INFO L175 Difference]: Start difference. First operand has 101 places, 98 transitions, 666 flow. Second operand 3 states and 655 transitions. [2023-08-30 06:42:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 96 transitions, 842 flow [2023-08-30 06:42:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 823 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 06:42:34,924 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 645 flow [2023-08-30 06:42:34,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2023-08-30 06:42:34,925 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2023-08-30 06:42:34,925 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 645 flow [2023-08-30 06:42:34,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:34,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:34,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:34,932 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 [2023-08-30 06:42:35,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:35,133 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:42:35,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 499409368, now seen corresponding path program 1 times [2023-08-30 06:42:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:35,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463506113] [2023-08-30 06:42:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:35,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:35,135 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:35,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:42:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:42:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:42:35,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:35,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:35,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463506113] [2023-08-30 06:42:35,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463506113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:35,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:35,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:42:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716507654] [2023-08-30 06:42:35,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:35,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2023-08-30 06:42:35,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:35,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:35,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2023-08-30 06:42:35,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:48,975 INFO L130 PetriNetUnfolder]: 117018/152859 cut-off events. [2023-08-30 06:42:48,975 INFO L131 PetriNetUnfolder]: For 105041/105041 co-relation queries the response was YES. [2023-08-30 06:42:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359700 conditions, 152859 events. 117018/152859 cut-off events. For 105041/105041 co-relation queries the response was YES. Maximal size of possible extension queue 6336. Compared 1022535 event pairs, 74467 based on Foata normal form. 0/97986 useless extension candidates. Maximal degree in co-relation 359665. Up to 145461 conditions per place. [2023-08-30 06:42:50,120 INFO L137 encePairwiseOnDemand]: 473/482 looper letters, 102 selfloop transitions, 18 changer transitions 0/126 dead transitions. [2023-08-30 06:42:50,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 986 flow [2023-08-30 06:42:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:42:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:42:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 881 transitions. [2023-08-30 06:42:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45695020746887965 [2023-08-30 06:42:50,122 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 881 transitions. [2023-08-30 06:42:50,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 881 transitions. [2023-08-30 06:42:50,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:50,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 881 transitions. [2023-08-30 06:42:50,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:50,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:50,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:50,125 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 645 flow. Second operand 4 states and 881 transitions. [2023-08-30 06:42:50,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 986 flow [2023-08-30 06:42:50,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 985 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:42:50,155 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 735 flow [2023-08-30 06:42:50,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=735, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-08-30 06:42:50,156 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2023-08-30 06:42:50,156 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 735 flow [2023-08-30 06:42:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:50,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:50,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-30 06:42:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:50,363 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:42:50,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 652409993, now seen corresponding path program 1 times [2023-08-30 06:42:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125402378] [2023-08-30 06:42:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:42:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:50,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:42:50,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:42:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:50,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:42:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:50,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:42:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:42:50,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:42:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:42:51,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125402378] [2023-08-30 06:42:51,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125402378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:42:51,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:42:51,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 06:42:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168397463] [2023-08-30 06:42:51,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:42:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:42:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:42:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:42:57,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 482 [2023-08-30 06:42:57,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:57,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:57,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 482 [2023-08-30 06:42:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:14,324 INFO L130 PetriNetUnfolder]: 103965/136308 cut-off events. [2023-08-30 06:43:14,324 INFO L131 PetriNetUnfolder]: For 108488/108488 co-relation queries the response was YES. [2023-08-30 06:43:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364517 conditions, 136308 events. 103965/136308 cut-off events. For 108488/108488 co-relation queries the response was YES. Maximal size of possible extension queue 5581. Compared 907627 event pairs, 66085 based on Foata normal form. 0/105183 useless extension candidates. Maximal degree in co-relation 364480. Up to 96979 conditions per place. [2023-08-30 06:43:15,614 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 151 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2023-08-30 06:43:15,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 192 transitions, 1412 flow [2023-08-30 06:43:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:43:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:43:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1810 transitions. [2023-08-30 06:43:15,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724296911018904 [2023-08-30 06:43:15,618 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1810 transitions. [2023-08-30 06:43:15,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1810 transitions. [2023-08-30 06:43:15,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:15,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1810 transitions. [2023-08-30 06:43:15,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.11111111111111) internal successors, (1810), 9 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:15,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:15,624 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:15,624 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 735 flow. Second operand 9 states and 1810 transitions. [2023-08-30 06:43:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 192 transitions, 1412 flow [2023-08-30 06:43:15,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 1369 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:15,700 INFO L231 Difference]: Finished difference. Result has 112 places, 100 transitions, 800 flow [2023-08-30 06:43:15,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=800, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2023-08-30 06:43:15,701 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2023-08-30 06:43:15,701 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 800 flow [2023-08-30 06:43:15,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:15,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:15,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:15,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-30 06:43:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:15,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:43:15,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1697951334, now seen corresponding path program 1 times [2023-08-30 06:43:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967640210] [2023-08-30 06:43:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:15,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:15,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:43:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:43:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:16,116 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 06:43:16,116 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 4 case distinctions, treesize of input 40 treesize of output 55 [2023-08-30 06:43:16,159 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:43:16,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:43:16,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:16,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967640210] [2023-08-30 06:43:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967640210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:16,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:16,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:16,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503827403] [2023-08-30 06:43:16,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:16,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 482 [2023-08-30 06:43:16,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:16,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 482 [2023-08-30 06:43:16,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:28,342 INFO L130 PetriNetUnfolder]: 97849/128236 cut-off events. [2023-08-30 06:43:28,342 INFO L131 PetriNetUnfolder]: For 155783/155783 co-relation queries the response was YES. [2023-08-30 06:43:28,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364882 conditions, 128236 events. 97849/128236 cut-off events. For 155783/155783 co-relation queries the response was YES. Maximal size of possible extension queue 5257. Compared 848706 event pairs, 62369 based on Foata normal form. 0/106573 useless extension candidates. Maximal degree in co-relation 364844. Up to 124068 conditions per place. [2023-08-30 06:43:29,421 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 91 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2023-08-30 06:43:29,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 98 transitions, 980 flow [2023-08-30 06:43:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-30 06:43:29,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432918395573997 [2023-08-30 06:43:29,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-30 06:43:29,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-30 06:43:29,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:29,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-30 06:43:29,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-30 06:43:29,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:29,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:29,425 INFO L175 Difference]: Start difference. First operand has 112 places, 100 transitions, 800 flow. Second operand 3 states and 641 transitions. [2023-08-30 06:43:29,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 98 transitions, 980 flow [2023-08-30 06:43:29,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 878 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-30 06:43:29,619 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 696 flow [2023-08-30 06:43:29,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=696, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-08-30 06:43:29,619 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2023-08-30 06:43:29,619 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 696 flow [2023-08-30 06:43:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:29,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:29,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:29,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:29,820 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:43:29,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1697951336, now seen corresponding path program 1 times [2023-08-30 06:43:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:29,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272190802] [2023-08-30 06:43:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:29,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:29,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:29,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:29,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:43:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:43:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:30,061 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 06:43:30,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 06:43:30,070 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 22 treesize of output 20 [2023-08-30 06:43:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:30,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:43:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:43:30,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:30,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272190802] [2023-08-30 06:43:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272190802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126922128] [2023-08-30 06:43:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:30,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-30 06:43:30,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:30,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:30,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-30 06:43:30,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:40,868 INFO L130 PetriNetUnfolder]: 84485/110671 cut-off events. [2023-08-30 06:43:40,869 INFO L131 PetriNetUnfolder]: For 139231/139231 co-relation queries the response was YES. [2023-08-30 06:43:41,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317142 conditions, 110671 events. 84485/110671 cut-off events. For 139231/139231 co-relation queries the response was YES. Maximal size of possible extension queue 4676. Compared 722042 event pairs, 54001 based on Foata normal form. 0/93311 useless extension candidates. Maximal degree in co-relation 317104. Up to 106886 conditions per place. [2023-08-30 06:43:41,790 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 89 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 06:43:41,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 96 transitions, 872 flow [2023-08-30 06:43:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-30 06:43:41,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460580912863071 [2023-08-30 06:43:41,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-30 06:43:41,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-30 06:43:41,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:41,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-30 06:43:41,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:41,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:41,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:41,795 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 696 flow. Second operand 3 states and 645 transitions. [2023-08-30 06:43:41,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 96 transitions, 872 flow [2023-08-30 06:43:41,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 96 transitions, 871 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:41,948 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 693 flow [2023-08-30 06:43:41,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=693, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2023-08-30 06:43:41,949 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2023-08-30 06:43:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 693 flow [2023-08-30 06:43:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:41,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:41,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:42,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:42,155 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-30 06:43:42,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:42,155 INFO L85 PathProgramCache]: Analyzing trace with hash 652409992, now seen corresponding path program 1 times [2023-08-30 06:43:42,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:42,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233606246] [2023-08-30 06:43:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:42,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:42,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:43:42,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:43:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:43:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:42,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:43:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:43:42,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:42,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233606246] [2023-08-30 06:43:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233606246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:42,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:43:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943679441] [2023-08-30 06:43:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:42,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 482 [2023-08-30 06:43:42,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 693 flow. Second operand has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:42,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:42,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 482 [2023-08-30 06:43:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand