./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.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-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 06:39:36,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:36,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:36,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:36,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:36,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:36,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:36,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:36,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:36,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:36,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:36,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:36,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:36,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:36,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:36,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:36,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:36,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:36,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:36,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:36,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:36,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:36,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:36,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:36,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:36,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:36,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:36,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:36,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:36,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:36,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:36,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:36,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:36,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:36,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:36,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:36,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:36,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:36,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:36,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:36,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:36,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:39:36,556 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:36,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:36,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:36,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:36,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:36,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:36,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:36,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:36,558 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:36,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:36,565 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:36,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:36,567 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:36,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:36,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:36,567 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:36,567 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:36,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:36,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:36,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:36,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:36,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:36,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:36,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:39:36,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:39:36,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:36,569 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:36,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:36,570 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:36,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:36,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:36,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:36,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:36,888 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:36,889 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:36,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 06:39:38,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:38,350 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:38,351 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 06:39:38,357 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dfb9972/a0eb73b8e5f14ff4a798c8dcba96bbc9/FLAG0d032c4c6 [2023-08-30 06:39:38,367 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dfb9972/a0eb73b8e5f14ff4a798c8dcba96bbc9 [2023-08-30 06:39:38,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:38,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:38,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:38,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:38,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:38,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:38" (1/1) ... [2023-08-30 06:39:38,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f74fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:38, skipping insertion in model container [2023-08-30 06:39:38,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:38" (1/1) ... [2023-08-30 06:39:38,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:38,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:38,545 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-series.wvr.c[4351,4364] [2023-08-30 06:39:38,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:38,575 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 06:39:38,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2048bfba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:38, skipping insertion in model container [2023-08-30 06:39:38,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:38,576 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:39:38,578 INFO L158 Benchmark]: Toolchain (without parser) took 206.44ms. Allocated memory is still 73.4MB. Free memory was 51.1MB in the beginning and 40.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:39:38,578 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 35.0MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:39:38,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.74ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 40.7MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:39:38,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 35.0MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.74ms. Allocated memory is still 73.4MB. Free memory was 50.9MB in the beginning and 40.7MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: 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-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 06:39:40,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:39:40,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:39:40,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:39:40,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:39:40,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:39:40,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:39:40,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:39:40,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:39:40,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:39:40,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:39:40,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:39:40,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:39:40,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:39:40,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:39:40,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:39:40,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:39:40,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:39:40,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:39:40,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:39:40,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:39:40,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:39:40,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:39:40,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:39:40,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:39:40,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:39:40,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:39:40,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:39:40,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:39:40,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:39:40,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:39:40,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:39:40,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:39:40,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:39:40,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:39:40,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:39:40,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:39:40,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:39:40,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:39:40,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:39:40,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:39:40,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:39:40,452 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:39:40,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:39:40,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:39:40,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:39:40,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:39:40,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:39:40,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:39:40,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:39:40,456 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:39:40,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:39:40,457 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:39:40,457 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:39:40,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:39:40,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:39:40,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:39:40,459 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:39:40,459 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:39:40,459 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:39:40,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:39:40,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:39:40,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:39:40,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:39:40,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:40,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:39:40,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:39:40,461 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:39:40,461 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:39:40,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:39:40,462 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:39:40,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:39:40,462 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:39:40,462 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:39:40,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:39:40,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:39:40,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:39:40,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:39:40,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:39:40,783 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:39:40,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 06:39:41,893 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:39:42,116 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:39:42,116 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 06:39:42,127 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058cae600/135618538d0f484b945213cf00bad973/FLAGf743eb6c9 [2023-08-30 06:39:42,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058cae600/135618538d0f484b945213cf00bad973 [2023-08-30 06:39:42,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:39:42,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:39:42,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:42,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:39:42,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:39:42,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb82b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42, skipping insertion in model container [2023-08-30 06:39:42,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:39:42,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:42,368 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-series.wvr.c[4351,4364] [2023-08-30 06:39:42,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:42,389 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:39:42,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:39:42,419 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-series.wvr.c[4351,4364] [2023-08-30 06:39:42,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:42,445 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:39:42,488 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-series.wvr.c[4351,4364] [2023-08-30 06:39:42,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:39:42,499 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:42,500 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:39:42,511 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:39:42,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42 WrapperNode [2023-08-30 06:39:42,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:39:42,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:42,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:39:42,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:39:42,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,584 INFO L138 Inliner]: procedures = 29, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 348 [2023-08-30 06:39:42,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:39:42,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:39:42,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:39:42,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:39:42,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:39:42,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:39:42,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:39:42,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:39:42,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (1/1) ... [2023-08-30 06:39:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:39:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:39:42,733 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 06:39:42,759 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 06:39:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:39:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:39:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:39:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:39:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:39:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:39:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:39:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:39:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:39:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:39:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:39:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:39:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:39:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:39:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:39:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:39:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:39:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:39:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:39:42,780 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 06:39:42,921 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:39:42,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:39:43,717 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:39:43,969 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:39:43,969 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 06:39:43,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:43 BoogieIcfgContainer [2023-08-30 06:39:43,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:39:43,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:39:43,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:39:43,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:39:43,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:39:42" (1/3) ... [2023-08-30 06:39:43,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a688277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:43, skipping insertion in model container [2023-08-30 06:39:43,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:39:42" (2/3) ... [2023-08-30 06:39:43,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a688277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:43, skipping insertion in model container [2023-08-30 06:39:43,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:43" (3/3) ... [2023-08-30 06:39:43,981 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-08-30 06:39:43,995 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:39:43,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 06:39:43,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:39:44,107 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:39:44,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 285 transitions, 602 flow [2023-08-30 06:39:44,277 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2023-08-30 06:39:44,277 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:39:44,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 281 events. 22/281 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-08-30 06:39:44,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 285 transitions, 602 flow [2023-08-30 06:39:44,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 277 transitions, 578 flow [2023-08-30 06:39:44,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:39:44,312 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 277 transitions, 578 flow [2023-08-30 06:39:44,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 277 transitions, 578 flow [2023-08-30 06:39:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 277 transitions, 578 flow [2023-08-30 06:39:44,372 INFO L130 PetriNetUnfolder]: 22/277 cut-off events. [2023-08-30 06:39:44,373 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:39:44,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 277 events. 22/277 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 311 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-08-30 06:39:44,379 INFO L119 LiptonReduction]: Number of co-enabled transitions 4104 [2023-08-30 06:40:12,004 INFO L134 LiptonReduction]: Checked pairs total: 8697 [2023-08-30 06:40:12,005 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-30 06:40:12,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:40:12,026 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;@205c27ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:40:12,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-30 06:40:12,030 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:40:12,030 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:40:12,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:12,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:40:12,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:40:12,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash 43390, now seen corresponding path program 1 times [2023-08-30 06:40:12,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:12,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223869070] [2023-08-30 06:40:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:12,050 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 06:40:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:12,054 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 06:40:12,108 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 06:40:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:40:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:12,419 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 06:40:12,420 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 06:40:12,470 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 06:40:12,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:12,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:12,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223869070] [2023-08-30 06:40:12,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223869070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:12,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:12,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:12,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113687168] [2023-08-30 06:40:12,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:12,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:12,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-08-30 06:40:12,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 06:40:12,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:12,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-08-30 06:40:12,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:18,170 INFO L130 PetriNetUnfolder]: 38573/47848 cut-off events. [2023-08-30 06:40:18,170 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2023-08-30 06:40:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95959 conditions, 47848 events. 38573/47848 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 3592. Compared 254278 event pairs, 25706 based on Foata normal form. 0/12053 useless extension candidates. Maximal degree in co-relation 88338. Up to 47088 conditions per place. [2023-08-30 06:40:18,778 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 06:40:18,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 292 flow [2023-08-30 06:40:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-30 06:40:18,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43797766019988243 [2023-08-30 06:40:18,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-30 06:40:18,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-30 06:40:18,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:18,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-30 06:40:18,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 06:40:18,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:40:18,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:40:18,824 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 176 flow. Second operand 3 states and 745 transitions. [2023-08-30 06:40:18,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 292 flow [2023-08-30 06:40:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:40:18,980 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 150 flow [2023-08-30 06:40:18,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-30 06:40:18,985 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -12 predicate places. [2023-08-30 06:40:18,985 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 150 flow [2023-08-30 06:40:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 06:40:18,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:18,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:40:18,997 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 06:40:19,195 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 06:40:19,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:40:19,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash 43391, now seen corresponding path program 1 times [2023-08-30 06:40:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:19,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216422510] [2023-08-30 06:40:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:19,197 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 06:40:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:19,199 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 06:40:19,202 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 06:40:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:19,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:40:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:19,436 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:40:19,437 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 06:40:19,468 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 06:40:19,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:19,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216422510] [2023-08-30 06:40:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216422510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:19,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:19,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617715804] [2023-08-30 06:40:19,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:19,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:19,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:19,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:19,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-08-30 06:40:19,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 06:40:19,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:19,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-08-30 06:40:19,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:28,720 INFO L130 PetriNetUnfolder]: 77145/95692 cut-off events. [2023-08-30 06:40:28,720 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:40:28,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190654 conditions, 95692 events. 77145/95692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6820. Compared 544318 event pairs, 51412 based on Foata normal form. 0/25089 useless extension candidates. Maximal degree in co-relation 190648. Up to 47089 conditions per place. [2023-08-30 06:40:29,237 INFO L137 encePairwiseOnDemand]: 558/567 looper letters, 118 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-08-30 06:40:29,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 130 transitions, 526 flow [2023-08-30 06:40:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-08-30 06:40:29,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714873603762493 [2023-08-30 06:40:29,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-08-30 06:40:29,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-08-30 06:40:29,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:29,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-08-30 06:40:29,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 06:40:29,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:40:29,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:40:29,248 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 150 flow. Second operand 3 states and 802 transitions. [2023-08-30 06:40:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 130 transitions, 526 flow [2023-08-30 06:40:29,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 130 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:29,251 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 199 flow [2023-08-30 06:40:29,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-30 06:40:29,252 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -9 predicate places. [2023-08-30 06:40:29,252 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 199 flow [2023-08-30 06:40:29,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 06:40:29,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:29,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:40:29,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:40:29,465 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 06:40:29,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:40:29,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1347592, now seen corresponding path program 1 times [2023-08-30 06:40:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269277623] [2023-08-30 06:40:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:29,467 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 06:40:29,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:29,475 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 06:40:29,475 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 06:40:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:29,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:40:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:29,714 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:40:29,714 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 06:40:29,784 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 06:40:29,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:29,950 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 06:40:29,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269277623] [2023-08-30 06:40:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269277623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:29,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:40:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570065565] [2023-08-30 06:40:29,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:40:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:40:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:40:30,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 567 [2023-08-30 06:40:30,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 06:40:30,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:30,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 567 [2023-08-30 06:40:30,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:43,932 INFO L130 PetriNetUnfolder]: 115727/143552 cut-off events. [2023-08-30 06:40:43,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:40:44,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286049 conditions, 143552 events. 115727/143552 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9112. Compared 840621 event pairs, 77118 based on Foata normal form. 0/38146 useless extension candidates. Maximal degree in co-relation 286040. Up to 47090 conditions per place. [2023-08-30 06:40:44,752 INFO L137 encePairwiseOnDemand]: 555/567 looper letters, 173 selfloop transitions, 27 changer transitions 0/206 dead transitions. [2023-08-30 06:40:44,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 206 transitions, 919 flow [2023-08-30 06:40:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:40:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:40:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1469 transitions. [2023-08-30 06:40:44,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43180482069370957 [2023-08-30 06:40:44,758 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1469 transitions. [2023-08-30 06:40:44,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1469 transitions. [2023-08-30 06:40:44,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:44,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1469 transitions. [2023-08-30 06:40:44,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states 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 06:40:44,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states 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 06:40:44,771 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states 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 06:40:44,772 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 199 flow. Second operand 6 states and 1469 transitions. [2023-08-30 06:40:44,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 206 transitions, 919 flow [2023-08-30 06:40:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 206 transitions, 895 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:40:44,779 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 391 flow [2023-08-30 06:40:44,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2023-08-30 06:40:44,780 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -2 predicate places. [2023-08-30 06:40:44,780 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 391 flow [2023-08-30 06:40:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 06:40:44,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:44,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:40:44,798 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 06:40:44,995 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 06:40:44,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:40:44,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 41833433, now seen corresponding path program 1 times [2023-08-30 06:40:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:44,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231148649] [2023-08-30 06:40:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:44,997 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 06:40:44,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:44,998 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 06:40:44,999 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 06:40:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:40:45,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:45,230 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-30 06:40:45,231 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 06:40:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:45,965 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-30 06:40:45,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-30 06:40:47,112 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 06:40:47,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-08-30 06:41:32,612 WARN L222 SmtUtils]: Spent 22.15s on a formula simplification. DAG size of input: 253 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:41:32,613 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 06:41:32,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:32,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231148649] [2023-08-30 06:41:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231148649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:32,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:41:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683708249] [2023-08-30 06:41:32,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:41:32,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:41:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 06:41:38,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:41:40,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:41:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 567 [2023-08-30 06:41:42,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 06:41:42,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:42,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 567 [2023-08-30 06:41:42,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:51,936 INFO L130 PetriNetUnfolder]: 92445/115467 cut-off events. [2023-08-30 06:41:51,936 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 06:41:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229941 conditions, 115467 events. 92445/115467 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7470. Compared 680025 event pairs, 61038 based on Foata normal form. 0/31619 useless extension candidates. Maximal degree in co-relation 229928. Up to 113187 conditions per place. [2023-08-30 06:41:52,586 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 85 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-08-30 06:41:52,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 92 transitions, 543 flow [2023-08-30 06:41:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:41:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:41:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-08-30 06:41:52,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38330393885949443 [2023-08-30 06:41:52,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-08-30 06:41:52,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-08-30 06:41:52,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:52,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-08-30 06:41:52,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states 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 06:41:52,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:41:52,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:41:52,596 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 391 flow. Second operand 3 states and 652 transitions. [2023-08-30 06:41:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 92 transitions, 543 flow [2023-08-30 06:41:52,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 92 transitions, 513 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:41:52,599 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 343 flow [2023-08-30 06:41:52,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-08-30 06:41:52,600 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-08-30 06:41:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 343 flow [2023-08-30 06:41:52,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 06:41:52,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:52,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:41:52,614 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 06:41:52,810 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 06:41:52,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:41:52,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 41833435, now seen corresponding path program 1 times [2023-08-30 06:41:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124515509] [2023-08-30 06:41:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:52,813 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 06:41:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:52,814 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 06:41:52,815 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 06:41:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:41:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:53,086 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:41:53,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 06:41:53,120 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 06:41:53,120 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 40 treesize of output 34 [2023-08-30 06:41:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:53,158 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 06:41:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:53,184 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 06:41:53,204 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 06:41:53,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:53,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124515509] [2023-08-30 06:41:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124515509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:53,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:53,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:41:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151775818] [2023-08-30 06:41:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:53,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:41:53,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:53,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:41:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:41:53,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-08-30 06:41:53,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 06:41:53,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:53,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-08-30 06:41:53,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:00,943 INFO L130 PetriNetUnfolder]: 69163/87382 cut-off events. [2023-08-30 06:42:00,944 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:42:01,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173745 conditions, 87382 events. 69163/87382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5321. Compared 517215 event pairs, 44958 based on Foata normal form. 0/27059 useless extension candidates. Maximal degree in co-relation 173731. Up to 85102 conditions per place. [2023-08-30 06:42:01,438 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 81 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-30 06:42:01,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 487 flow [2023-08-30 06:42:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:42:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:42:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 06:42:01,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44738389182833627 [2023-08-30 06:42:01,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 06:42:01,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 06:42:01,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:01,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 06:42:01,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states 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 06:42:01,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:01,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:01,448 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 343 flow. Second operand 3 states and 761 transitions. [2023-08-30 06:42:01,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 487 flow [2023-08-30 06:42:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:42:01,451 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 324 flow [2023-08-30 06:42:01,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-08-30 06:42:01,452 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -4 predicate places. [2023-08-30 06:42:01,452 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 324 flow [2023-08-30 06:42:01,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 06:42:01,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:01,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:42:01,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:01,662 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 06:42:01,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:42:01,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257830, now seen corresponding path program 1 times [2023-08-30 06:42:01,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:01,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818712011] [2023-08-30 06:42:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:01,663 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 06:42:01,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:01,664 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 06:42:01,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:42:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:01,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:42:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:01,908 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-30 06:42:01,909 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 06:42:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:03,234 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2023-08-30 06:42:03,235 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 52 [2023-08-30 06:42:03,933 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-30 06:42:03,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 174 [2023-08-30 06:42:32,162 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 06:42:32,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:32,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:32,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818712011] [2023-08-30 06:42:32,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818712011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:32,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:32,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:32,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108333490] [2023-08-30 06:42:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:32,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:33,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 567 [2023-08-30 06:42:33,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 06:42:33,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:33,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 567 [2023-08-30 06:42:33,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:40,433 INFO L130 PetriNetUnfolder]: 67192/84787 cut-off events. [2023-08-30 06:42:40,433 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:42:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168556 conditions, 84787 events. 67192/84787 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5177. Compared 498563 event pairs, 43455 based on Foata normal form. 0/26588 useless extension candidates. Maximal degree in co-relation 168541. Up to 82507 conditions per place. [2023-08-30 06:42:40,951 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 06:42:40,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 480 flow [2023-08-30 06:42:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:42:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:42:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2023-08-30 06:42:40,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 06:42:40,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2023-08-30 06:42:40,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2023-08-30 06:42:40,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:40,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2023-08-30 06:42:40,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states 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 06:42:40,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:40,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:40,960 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 324 flow. Second operand 3 states and 756 transitions. [2023-08-30 06:42:40,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 480 flow [2023-08-30 06:42:40,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:42:40,963 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 321 flow [2023-08-30 06:42:40,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2023-08-30 06:42:40,964 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -5 predicate places. [2023-08-30 06:42:40,964 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 321 flow [2023-08-30 06:42:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.5) internal successors, (934), 4 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 06:42:40,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:40,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:42:40,979 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 06:42:41,174 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 06:42:41,175 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:42:41,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257831, now seen corresponding path program 1 times [2023-08-30 06:42:41,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:41,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055869513] [2023-08-30 06:42:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:41,176 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 06:42:41,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:41,177 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 06:42:41,179 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 06:42:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:42:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,453 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-08-30 06:42:41,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-08-30 06:42:41,486 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 06:42:41,486 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 80 treesize of output 81 [2023-08-30 06:42:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,579 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 06:42:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:41,604 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 06:42:41,652 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 06:42:41,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:41,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055869513] [2023-08-30 06:42:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055869513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:41,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409724950] [2023-08-30 06:42:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:41,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-08-30 06:42:41,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 06:42:41,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:41,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-08-30 06:42:41,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:49,139 INFO L130 PetriNetUnfolder]: 65221/82192 cut-off events. [2023-08-30 06:42:49,139 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 06:42:49,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163367 conditions, 82192 events. 65221/82192 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5033. Compared 480110 event pairs, 41952 based on Foata normal form. 0/26117 useless extension candidates. Maximal degree in co-relation 163351. Up to 79912 conditions per place. [2023-08-30 06:42:49,675 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 06:42:49,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 473 flow [2023-08-30 06:42:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:42:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:42:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-08-30 06:42:49,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450323339212228 [2023-08-30 06:42:49,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-08-30 06:42:49,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-08-30 06:42:49,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:49,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-08-30 06:42:49,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 06:42:49,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:49,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 06:42:49,683 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 321 flow. Second operand 3 states and 757 transitions. [2023-08-30 06:42:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 473 flow [2023-08-30 06:42:49,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:42:49,685 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 318 flow [2023-08-30 06:42:49,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=318, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2023-08-30 06:42:49,686 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-08-30 06:42:49,687 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 318 flow [2023-08-30 06:42:49,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 06:42:49,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:49,687 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:42:49,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:49,895 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 06:42:49,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:42:49,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1493861311, now seen corresponding path program 2 times [2023-08-30 06:42:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315279190] [2023-08-30 06:42:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:42:49,896 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 06:42:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:49,899 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 06:42:49,900 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 06:42:49,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:42:49,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:42:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:42:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:50,149 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 06:42:50,150 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 06:42:50,294 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 06:42:50,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:42:50,932 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 06:42:50,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315279190] [2023-08-30 06:42:50,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315279190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:42:50,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:42:50,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:42:50,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651602310] [2023-08-30 06:42:50,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:42:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:42:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:42:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:42:56,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 567 [2023-08-30 06:42:56,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states 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 06:42:56,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:56,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 567 [2023-08-30 06:42:56,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:59,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:01,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:03,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:06,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:08,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:10,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:12,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:14,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:17,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:20,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:49,415 INFO L130 PetriNetUnfolder]: 217384/273931 cut-off events. [2023-08-30 06:43:49,416 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 06:43:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544353 conditions, 273931 events. 217384/273931 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 10412. Compared 1727986 event pairs, 139840 based on Foata normal form. 17/90102 useless extension candidates. Maximal degree in co-relation 544336. Up to 26650 conditions per place. [2023-08-30 06:43:51,131 INFO L137 encePairwiseOnDemand]: 557/567 looper letters, 478 selfloop transitions, 53 changer transitions 0/537 dead transitions. [2023-08-30 06:43:51,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 537 transitions, 2518 flow [2023-08-30 06:43:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:43:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:43:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3743 transitions. [2023-08-30 06:43:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44009406231628456 [2023-08-30 06:43:51,141 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3743 transitions. [2023-08-30 06:43:51,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3743 transitions. [2023-08-30 06:43:51,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:51,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3743 transitions. [2023-08-30 06:43:51,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 249.53333333333333) internal successors, (3743), 15 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states 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 06:43:51,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 567.0) internal successors, (9072), 16 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states 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 06:43:51,161 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 567.0) internal successors, (9072), 16 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states 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 06:43:51,161 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 318 flow. Second operand 15 states and 3743 transitions. [2023-08-30 06:43:51,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 537 transitions, 2518 flow [2023-08-30 06:43:51,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 537 transitions, 2517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:51,169 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 717 flow [2023-08-30 06:43:51,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=717, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2023-08-30 06:43:51,170 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 17 predicate places. [2023-08-30 06:43:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 717 flow [2023-08-30 06:43:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states 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 06:43:51,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:51,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:51,183 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 06:43:51,381 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 06:43:51,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-30 06:43:51,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash 720344793, now seen corresponding path program 1 times [2023-08-30 06:43:51,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:51,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089006392] [2023-08-30 06:43:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:51,383 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 06:43:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:51,384 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 06:43:51,387 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 06:43:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:43:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:51,497 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 06:43:51,640 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 06:43:51,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:51,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089006392] [2023-08-30 06:43:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089006392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:51,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:51,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:43:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565398619] [2023-08-30 06:43:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:43:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:43:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:43:52,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 567 [2023-08-30 06:43:52,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 717 flow. Second operand has 6 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states 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 06:43:52,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:52,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 567 [2023-08-30 06:43:52,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand