./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.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-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --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 06:10:48,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:48,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:48,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:48,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:48,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:48,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:48,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:48,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:48,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:48,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:48,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:48,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:48,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:48,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:48,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:48,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:48,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:48,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:48,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:48,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:48,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:48,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:48,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:48,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:48,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:48,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:48,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:48,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:48,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:48,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:48,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:48,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:48,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:48,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:48,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:48,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:48,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:48,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:48,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:48,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:48,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:10:48,591 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:48,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:48,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:48,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:48,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:48,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:48,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:48,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:48,594 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:48,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:48,595 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:48,595 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:48,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:48,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:48,597 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:48,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:48,597 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:48,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:48,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:48,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:48,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:48,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:48,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:48,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:10:48,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:10:48,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:48,599 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:48,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:48,599 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:48,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:48,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:48,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:48,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:48,962 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:48,963 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:48,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 06:10:50,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:50,335 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:50,336 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 06:10:50,341 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c77c9fb4d/858679c3ccc84373bd3d7ea4bb02ee04/FLAG89544c229 [2023-08-30 06:10:50,355 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c77c9fb4d/858679c3ccc84373bd3d7ea4bb02ee04 [2023-08-30 06:10:50,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:50,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:50,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:50,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:50,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:50,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422e72ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50, skipping insertion in model container [2023-08-30 06:10:50,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:50" (1/1) ... [2023-08-30 06:10:50,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:50,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:50,524 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-bad-ring.wvr.c[3947,3960] [2023-08-30 06:10:50,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:50,542 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 06:10:50,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d90a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:50, skipping insertion in model container [2023-08-30 06:10:50,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:50,543 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:10:50,545 INFO L158 Benchmark]: Toolchain (without parser) took 185.99ms. Allocated memory is still 65.0MB. Free memory was 44.1MB in the beginning and 33.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:10:50,545 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:10:50,546 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.23ms. Allocated memory is still 65.0MB. Free memory was 43.7MB in the beginning and 33.8MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:10:50,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.23ms. Allocated memory is still 65.0MB. Free memory was 43.7MB in the beginning and 33.8MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: 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-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --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 06:10:52,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:52,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:52,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:52,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:52,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:52,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:52,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:52,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:52,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:52,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:52,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:52,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:52,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:52,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:52,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:52,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:52,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:52,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:52,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:52,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:52,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:52,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:52,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:52,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:52,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:52,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:52,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:52,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:52,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:52,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:52,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:52,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:52,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:52,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:52,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:52,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:52,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:52,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:52,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:52,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:52,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:10:52,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:52,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:52,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:52,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:52,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:52,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:52,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:52,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:52,380 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:52,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:52,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:52,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:52,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:52,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:52,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:52,382 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:52,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:52,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:52,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:52,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:52,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:10:52,383 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:10:52,383 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:52,383 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:52,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:52,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:52,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:52,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:52,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:52,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:52,385 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:10:52,385 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:10:52,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:52,386 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:52,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:52,386 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:10:52,386 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:52,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:52,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:52,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:52,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:52,714 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:52,715 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:52,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 06:10:54,007 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:54,245 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:54,246 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-30 06:10:54,255 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2962f01d/361ba0bba23a488ba0fa6f8b64d9d8bf/FLAGbabfe8fd7 [2023-08-30 06:10:54,271 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2962f01d/361ba0bba23a488ba0fa6f8b64d9d8bf [2023-08-30 06:10:54,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:54,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:54,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:54,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:54,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:54,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d4d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54, skipping insertion in model container [2023-08-30 06:10:54,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:54,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:54,521 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-bad-ring.wvr.c[3947,3960] [2023-08-30 06:10:54,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:54,556 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:10:54,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:54,600 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-bad-ring.wvr.c[3947,3960] [2023-08-30 06:10:54,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:54,616 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:10:54,661 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-bad-ring.wvr.c[3947,3960] [2023-08-30 06:10:54,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:54,677 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:54,679 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:54,685 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:10:54,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54 WrapperNode [2023-08-30 06:10:54,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:54,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:54,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:10:54,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:10:54,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,737 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2023-08-30 06:10:54,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:54,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:10:54,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:10:54,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:10:54,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:10:54,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:10:54,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:10:54,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:10:54,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (1/1) ... [2023-08-30 06:10:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:54,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:10:54,846 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 06:10:54,868 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 06:10:54,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:10:54,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:10:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:10:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:10:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:10:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:10:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:10:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:10:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:10:54,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:10:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:10:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:10:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:10:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:10:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:10:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:10:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:10:54,889 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 06:10:55,009 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:10:55,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:10:55,781 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:10:55,989 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:10:55,989 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:10:55,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:55 BoogieIcfgContainer [2023-08-30 06:10:55,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:10:55,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:10:55,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:10:55,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:10:55,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:10:54" (1/3) ... [2023-08-30 06:10:55,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464765d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:55, skipping insertion in model container [2023-08-30 06:10:55,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:54" (2/3) ... [2023-08-30 06:10:55,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464765d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:55, skipping insertion in model container [2023-08-30 06:10:55,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:55" (3/3) ... [2023-08-30 06:10:56,000 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-30 06:10:56,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:10:56,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-30 06:10:56,020 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:10:56,113 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:10:56,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 281 transitions, 586 flow [2023-08-30 06:10:56,285 INFO L130 PetriNetUnfolder]: 22/278 cut-off events. [2023-08-30 06:10:56,285 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:56,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 22/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 305 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-08-30 06:10:56,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 281 transitions, 586 flow [2023-08-30 06:10:56,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 274 transitions, 566 flow [2023-08-30 06:10:56,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:10:56,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 274 transitions, 566 flow [2023-08-30 06:10:56,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 274 transitions, 566 flow [2023-08-30 06:10:56,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 274 transitions, 566 flow [2023-08-30 06:10:56,358 INFO L130 PetriNetUnfolder]: 22/274 cut-off events. [2023-08-30 06:10:56,358 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:56,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 274 events. 22/274 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 306 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-08-30 06:10:56,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2023-08-30 06:11:25,275 INFO L134 LiptonReduction]: Checked pairs total: 7895 [2023-08-30 06:11:25,275 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-30 06:11:25,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:11:25,292 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;@607e6487, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:11:25,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-30 06:11:25,296 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:11:25,296 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:11:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:25,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:25,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:25,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 41322, now seen corresponding path program 1 times [2023-08-30 06:11:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651068950] [2023-08-30 06:11:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:25,319 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 06:11:25,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:25,322 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 06:11:25,333 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 06:11:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:11:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:25,723 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:25,724 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:11:25,766 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 06:11:25,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:25,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651068950] [2023-08-30 06:11:25,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651068950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:25,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:25,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233770710] [2023-08-30 06:11:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:25,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:26,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-08-30 06:11:26,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:26,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:26,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-08-30 06:11:26,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:29,463 INFO L130 PetriNetUnfolder]: 16535/22976 cut-off events. [2023-08-30 06:11:29,464 INFO L131 PetriNetUnfolder]: For 536/536 co-relation queries the response was YES. [2023-08-30 06:11:29,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 22976 events. 16535/22976 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132314 event pairs, 14450 based on Foata normal form. 0/8181 useless extension candidates. Maximal degree in co-relation 21460. Up to 11491 conditions per place. [2023-08-30 06:11:29,611 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 116 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-08-30 06:11:29,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 524 flow [2023-08-30 06:11:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-30 06:11:29,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628339140534262 [2023-08-30 06:11:29,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-30 06:11:29,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-30 06:11:29,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:29,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-30 06:11:29,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 06:11:29,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:29,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:29,655 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 150 flow. Second operand 3 states and 797 transitions. [2023-08-30 06:11:29,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 524 flow [2023-08-30 06:11:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 500 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:11:29,672 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 182 flow [2023-08-30 06:11:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-30 06:11:29,682 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-30 06:11:29,683 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 182 flow [2023-08-30 06:11:29,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:29,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:29,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:29,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 06:11:29,893 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 06:11:29,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:29,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash 41323, now seen corresponding path program 1 times [2023-08-30 06:11:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495271416] [2023-08-30 06:11:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:29,895 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 06:11:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:29,896 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 06:11:29,902 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 06:11:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:11:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:30,029 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:11:30,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:11:30,046 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 06:11:30,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:30,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495271416] [2023-08-30 06:11:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495271416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:30,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010460908] [2023-08-30 06:11:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:30,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:30,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-08-30 06:11:30,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:30,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:30,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-08-30 06:11:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:32,710 INFO L130 PetriNetUnfolder]: 16535/22970 cut-off events. [2023-08-30 06:11:32,710 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-30 06:11:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46146 conditions, 22970 events. 16535/22970 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132313 event pairs, 14450 based on Foata normal form. 4/8191 useless extension candidates. Maximal degree in co-relation 23053. Up to 22970 conditions per place. [2023-08-30 06:11:32,885 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 06:11:32,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 306 flow [2023-08-30 06:11:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-08-30 06:11:32,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42334494773519166 [2023-08-30 06:11:32,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-08-30 06:11:32,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-08-30 06:11:32,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:32,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-08-30 06:11:32,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 06:11:32,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:32,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:32,896 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 182 flow. Second operand 3 states and 729 transitions. [2023-08-30 06:11:32,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 306 flow [2023-08-30 06:11:32,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:11:32,900 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 166 flow [2023-08-30 06:11:32,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-30 06:11:32,901 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-08-30 06:11:32,901 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 166 flow [2023-08-30 06:11:32,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:32,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:32,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:11:32,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:33,113 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 06:11:33,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:33,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1285445, now seen corresponding path program 1 times [2023-08-30 06:11:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:33,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201862137] [2023-08-30 06:11:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:33,115 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 06:11:33,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:33,120 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 06:11:33,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:11:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:11:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:33,306 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:33,307 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:11:33,377 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 06:11:33,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:11:33,570 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 06:11:33,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201862137] [2023-08-30 06:11:33,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201862137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:11:33,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:11:33,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:11:33,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371416058] [2023-08-30 06:11:33,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:11:33,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:11:33,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:11:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:11:34,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 574 [2023-08-30 06:11:34,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 06:11:34,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:34,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 574 [2023-08-30 06:11:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:38,837 INFO L130 PetriNetUnfolder]: 24812/34469 cut-off events. [2023-08-30 06:11:38,838 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-30 06:11:38,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69245 conditions, 34469 events. 24812/34469 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 1872. Compared 206008 event pairs, 21675 based on Foata normal form. 0/12282 useless extension candidates. Maximal degree in co-relation 69237. Up to 11489 conditions per place. [2023-08-30 06:11:39,000 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 161 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2023-08-30 06:11:39,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 188 transitions, 830 flow [2023-08-30 06:11:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:11:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:11:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1439 transitions. [2023-08-30 06:11:39,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178281068524971 [2023-08-30 06:11:39,005 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1439 transitions. [2023-08-30 06:11:39,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1439 transitions. [2023-08-30 06:11:39,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:39,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1439 transitions. [2023-08-30 06:11:39,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.83333333333334) internal successors, (1439), 6 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states 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 06:11:39,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states 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 06:11:39,021 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states 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 06:11:39,021 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 166 flow. Second operand 6 states and 1439 transitions. [2023-08-30 06:11:39,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 188 transitions, 830 flow [2023-08-30 06:11:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 188 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:39,027 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 369 flow [2023-08-30 06:11:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2023-08-30 06:11:39,028 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-30 06:11:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 369 flow [2023-08-30 06:11:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 06:11:39,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:39,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:39,043 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 06:11:39,240 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 06:11:39,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:39,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 39887349, now seen corresponding path program 1 times [2023-08-30 06:11:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:39,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815275798] [2023-08-30 06:11:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:39,242 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 06:11:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:39,243 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 06:11:39,243 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 06:11:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:11:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:39,440 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:11:39,440 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 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:11:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:39,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:11:39,579 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:11:39,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:11:39,592 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 06:11:39,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:39,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815275798] [2023-08-30 06:11:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815275798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:39,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:39,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:39,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660472154] [2023-08-30 06:11:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:39,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:39,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-30 06:11:39,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 06:11:39,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:39,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-30 06:11:39,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:41,923 INFO L130 PetriNetUnfolder]: 19050/26784 cut-off events. [2023-08-30 06:11:41,923 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 06:11:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53949 conditions, 26784 events. 19050/26784 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 159809 event pairs, 16587 based on Foata normal form. 0/10277 useless extension candidates. Maximal degree in co-relation 53936. Up to 26784 conditions per place. [2023-08-30 06:11:42,036 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 06:11:42,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2023-08-30 06:11:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-30 06:11:42,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337979094076655 [2023-08-30 06:11:42,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-30 06:11:42,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-30 06:11:42,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:42,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-30 06:11:42,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states 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 06:11:42,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:42,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:42,047 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 369 flow. Second operand 3 states and 747 transitions. [2023-08-30 06:11:42,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2023-08-30 06:11:42,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 483 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:42,051 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 321 flow [2023-08-30 06:11:42,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2023-08-30 06:11:42,052 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-30 06:11:42,052 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 321 flow [2023-08-30 06:11:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 06:11:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:42,062 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 (5)] Ended with exit code 0 [2023-08-30 06:11:42,262 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 06:11:42,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:42,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 39887350, now seen corresponding path program 1 times [2023-08-30 06:11:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:42,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469622307] [2023-08-30 06:11:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:42,264 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 06:11:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:42,265 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 06:11:42,268 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 06:11:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:11:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,487 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:11:42,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:11:42,514 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:11:42,514 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 23 treesize of output 19 [2023-08-30 06:11:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,573 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 06:11:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:42,607 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 06:11:42,638 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 06:11:42,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:42,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:42,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469622307] [2023-08-30 06:11:42,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469622307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:42,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:42,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:42,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028290222] [2023-08-30 06:11:42,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-30 06:11:42,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 06:11:42,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:42,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-30 06:11:42,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:44,747 INFO L130 PetriNetUnfolder]: 13288/19099 cut-off events. [2023-08-30 06:11:44,748 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:11:44,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38553 conditions, 19099 events. 13288/19099 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 113000 event pairs, 11499 based on Foata normal form. 0/8261 useless extension candidates. Maximal degree in co-relation 38539. Up to 19099 conditions per place. [2023-08-30 06:11:44,805 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-30 06:11:44,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 457 flow [2023-08-30 06:11:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-30 06:11:44,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326364692218351 [2023-08-30 06:11:44,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-30 06:11:44,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-30 06:11:44,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:44,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-30 06:11:44,812 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 06:11:44,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:44,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:44,815 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 321 flow. Second operand 3 states and 745 transitions. [2023-08-30 06:11:44,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 457 flow [2023-08-30 06:11:44,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:44,817 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 302 flow [2023-08-30 06:11:44,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-08-30 06:11:44,817 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-30 06:11:44,818 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 302 flow [2023-08-30 06:11:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 06:11:44,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:44,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:11:44,828 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 06:11:45,019 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 06:11:45,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:45,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -322930208, now seen corresponding path program 1 times [2023-08-30 06:11:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:45,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262658955] [2023-08-30 06:11:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:45,020 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 06:11:45,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:45,021 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 06:11:45,022 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 06:11:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:11:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:45,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:45,216 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:11:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:11:45,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:11:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:45,280 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 06:11:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:45,306 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 06:11:45,351 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 06:11:45,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:45,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262658955] [2023-08-30 06:11:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262658955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:45,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:45,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:45,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445216544] [2023-08-30 06:11:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:45,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:45,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-30 06:11:45,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 06:11:45,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:45,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-30 06:11:45,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:47,081 INFO L130 PetriNetUnfolder]: 12874/18463 cut-off events. [2023-08-30 06:11:47,081 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:11:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37282 conditions, 18463 events. 12874/18463 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 108521 event pairs, 11136 based on Foata normal form. 0/8108 useless extension candidates. Maximal degree in co-relation 37267. Up to 18463 conditions per place. [2023-08-30 06:11:47,180 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 75 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 06:11:47,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 450 flow [2023-08-30 06:11:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-30 06:11:47,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43147502903600465 [2023-08-30 06:11:47,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-30 06:11:47,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-30 06:11:47,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:47,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-30 06:11:47,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 06:11:47,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:47,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:47,187 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 302 flow. Second operand 3 states and 743 transitions. [2023-08-30 06:11:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 450 flow [2023-08-30 06:11:47,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:47,189 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 299 flow [2023-08-30 06:11:47,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-30 06:11:47,190 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2023-08-30 06:11:47,190 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 299 flow [2023-08-30 06:11:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 06:11:47,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:47,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:11:47,200 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 06:11:47,392 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 06:11:47,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:47,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -322930209, now seen corresponding path program 1 times [2023-08-30 06:11:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821362597] [2023-08-30 06:11:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:47,394 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 06:11:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:47,395 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 06:11:47,396 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 06:11:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:11:47,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:47,555 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:11:47,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:11:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:47,793 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 06:11:47,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 06:11:47,955 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 06:11:47,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:11:48,097 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 06:11:48,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:48,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:48,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821362597] [2023-08-30 06:11:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821362597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:48,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409306633] [2023-08-30 06:11:48,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:48,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-30 06:11:48,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 06:11:48,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:48,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-30 06:11:48,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:49,975 INFO L130 PetriNetUnfolder]: 12460/17827 cut-off events. [2023-08-30 06:11:49,975 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:11:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 17827 events. 12460/17827 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 103923 event pairs, 10773 based on Foata normal form. 0/7955 useless extension candidates. Maximal degree in co-relation 35995. Up to 17827 conditions per place. [2023-08-30 06:11:50,069 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 06:11:50,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 443 flow [2023-08-30 06:11:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2023-08-30 06:11:50,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031358885017423 [2023-08-30 06:11:50,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2023-08-30 06:11:50,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2023-08-30 06:11:50,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:50,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2023-08-30 06:11:50,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states 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 06:11:50,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:50,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:11:50,077 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 299 flow. Second operand 3 states and 741 transitions. [2023-08-30 06:11:50,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 443 flow [2023-08-30 06:11:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:50,079 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 296 flow [2023-08-30 06:11:50,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-30 06:11:50,080 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-30 06:11:50,080 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 296 flow [2023-08-30 06:11:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 06:11:50,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:50,081 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:11:50,092 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 06:11:50,289 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 06:11:50,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:50,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash -355581910, now seen corresponding path program 2 times [2023-08-30 06:11:50,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:50,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625881839] [2023-08-30 06:11:50,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:11:50,290 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 06:11:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:50,292 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 06:11:50,293 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 06:11:50,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:11:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:11:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:11:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:50,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:50,469 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:11:50,607 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 06:11:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:11:51,173 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 06:11:51,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625881839] [2023-08-30 06:11:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625881839] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:11:51,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:11:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:11:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65048077] [2023-08-30 06:11:51,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:11:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:11:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:11:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:11:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 574 [2023-08-30 06:11:54,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 06:11:54,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:54,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 574 [2023-08-30 06:11:54,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:57,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:11:59,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:00,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:03,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:04,839 WARN L539 Checker$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 06:12:06,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:08,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:10,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:12,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:13,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:15,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:17,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:25,470 INFO L130 PetriNetUnfolder]: 41514/59380 cut-off events. [2023-08-30 06:12:25,470 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-08-30 06:12:25,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119827 conditions, 59380 events. 41514/59380 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 385403 event pairs, 35910 based on Foata normal form. 18/26484 useless extension candidates. Maximal degree in co-relation 119810. Up to 6400 conditions per place. [2023-08-30 06:12:25,805 INFO L137 encePairwiseOnDemand]: 564/574 looper letters, 438 selfloop transitions, 52 changer transitions 0/490 dead transitions. [2023-08-30 06:12:25,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 490 transitions, 2314 flow [2023-08-30 06:12:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:12:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:12:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3028 transitions. [2023-08-30 06:12:25,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43960511033681765 [2023-08-30 06:12:25,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3028 transitions. [2023-08-30 06:12:25,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3028 transitions. [2023-08-30 06:12:25,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:25,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3028 transitions. [2023-08-30 06:12:25,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 06:12:25,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states 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 06:12:25,830 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states 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 06:12:25,830 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 296 flow. Second operand 12 states and 3028 transitions. [2023-08-30 06:12:25,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 490 transitions, 2314 flow [2023-08-30 06:12:25,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 490 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:25,837 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 685 flow [2023-08-30 06:12:25,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=685, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-08-30 06:12:25,838 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-08-30 06:12:25,838 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 685 flow [2023-08-30 06:12:25,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 06:12:25,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:25,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:25,854 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 06:12:26,048 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 06:12:26,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:26,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1420903504, now seen corresponding path program 1 times [2023-08-30 06:12:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193798211] [2023-08-30 06:12:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:26,050 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 06:12:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:26,051 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 06:12:26,054 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 06:12:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:12:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:26,188 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 06:12:26,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:26,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:26,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193798211] [2023-08-30 06:12:26,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193798211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:26,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:26,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:26,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281279469] [2023-08-30 06:12:26,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:26,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 574 [2023-08-30 06:12:26,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 685 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states 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 06:12:26,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:26,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 574 [2023-08-30 06:12:26,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:32,205 INFO L130 PetriNetUnfolder]: 42676/61416 cut-off events. [2023-08-30 06:12:32,205 INFO L131 PetriNetUnfolder]: For 741/741 co-relation queries the response was YES. [2023-08-30 06:12:32,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124254 conditions, 61416 events. 42676/61416 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 1816. Compared 404479 event pairs, 36980 based on Foata normal form. 820/28853 useless extension candidates. Maximal degree in co-relation 124229. Up to 59379 conditions per place. [2023-08-30 06:12:32,547 INFO L137 encePairwiseOnDemand]: 560/574 looper letters, 158 selfloop transitions, 3 changer transitions 1/162 dead transitions. [2023-08-30 06:12:32,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 162 transitions, 1415 flow [2023-08-30 06:12:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:12:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:12:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-08-30 06:12:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42726480836236935 [2023-08-30 06:12:32,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-08-30 06:12:32,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-08-30 06:12:32,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:32,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-08-30 06:12:32,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 06:12:32,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 06:12:32,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 06:12:32,557 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 685 flow. Second operand 4 states and 981 transitions. [2023-08-30 06:12:32,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 162 transitions, 1415 flow [2023-08-30 06:12:32,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 162 transitions, 1264 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 06:12:32,562 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 621 flow [2023-08-30 06:12:32,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-08-30 06:12:32,563 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-08-30 06:12:32,563 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 621 flow [2023-08-30 06:12:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states 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 06:12:32,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:32,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:32,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:32,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:32,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255226, now seen corresponding path program 1 times [2023-08-30 06:12:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:32,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108559719] [2023-08-30 06:12:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:32,775 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 06:12:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:32,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:32,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:12:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:32,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:12:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:32,929 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:12:32,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 06:12:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:32,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:12:32,995 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:12:32,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:12:33,043 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 06:12:33,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:33,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108559719] [2023-08-30 06:12:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108559719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:33,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:33,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:33,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461940583] [2023-08-30 06:12:33,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:33,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 574 [2023-08-30 06:12:33,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 621 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 06:12:33,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:33,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 574 [2023-08-30 06:12:33,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:38,968 INFO L130 PetriNetUnfolder]: 40956/58776 cut-off events. [2023-08-30 06:12:38,968 INFO L131 PetriNetUnfolder]: For 3913/3913 co-relation queries the response was YES. [2023-08-30 06:12:39,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138422 conditions, 58776 events. 40956/58776 cut-off events. For 3913/3913 co-relation queries the response was YES. Maximal size of possible extension queue 1864. Compared 384382 event pairs, 35450 based on Foata normal form. 0/27426 useless extension candidates. Maximal degree in co-relation 138395. Up to 58776 conditions per place. [2023-08-30 06:12:39,473 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 06:12:39,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 823 flow [2023-08-30 06:12:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2023-08-30 06:12:39,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221835075493612 [2023-08-30 06:12:39,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2023-08-30 06:12:39,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2023-08-30 06:12:39,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:39,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2023-08-30 06:12:39,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 06:12:39,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:12:39,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:12:39,481 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 621 flow. Second operand 3 states and 727 transitions. [2023-08-30 06:12:39,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 823 flow [2023-08-30 06:12:39,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 817 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:39,488 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 613 flow [2023-08-30 06:12:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2023-08-30 06:12:39,489 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-08-30 06:12:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 613 flow [2023-08-30 06:12:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 06:12:39,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:39,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:39,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:39,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:39,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:39,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1399459659, now seen corresponding path program 1 times [2023-08-30 06:12:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:39,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536519507] [2023-08-30 06:12:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:39,700 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 06:12:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:39,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:39,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:12:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:12:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:39,905 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:12:39,905 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:12:39,981 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:12:39,982 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:12:40,108 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:12:40,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:12:40,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:12:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:40,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:12:40,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:12:40,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:12:40,198 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 06:12:40,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:12:45,142 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 06:12:45,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536519507] [2023-08-30 06:12:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536519507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:12:45,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:12:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:12:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299600946] [2023-08-30 06:12:45,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:12:45,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:12:45,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:12:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:12:47,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:12:49,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:12:51,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:12:56,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:12:58,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:01,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:04,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:07,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:09,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:12,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:15,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:17,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:19,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 574 [2023-08-30 06:13:19,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 613 flow. Second operand has 10 states, 10 states have (on average 183.6) internal successors, (1836), 10 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:19,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:19,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 574 [2023-08-30 06:13:19,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:34,728 WARN L222 SmtUtils]: Spent 15.00s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:13:35,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:38,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:52,934 WARN L222 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:13:56,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:58,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:00,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:15,104 WARN L222 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:14:27,153 INFO L130 PetriNetUnfolder]: 78680/112928 cut-off events. [2023-08-30 06:14:27,153 INFO L131 PetriNetUnfolder]: For 8961/8961 co-relation queries the response was YES. [2023-08-30 06:14:27,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260280 conditions, 112928 events. 78680/112928 cut-off events. For 8961/8961 co-relation queries the response was YES. Maximal size of possible extension queue 3172. Compared 793627 event pairs, 66490 based on Foata normal form. 0/57238 useless extension candidates. Maximal degree in co-relation 260252. Up to 56761 conditions per place. [2023-08-30 06:14:27,916 INFO L137 encePairwiseOnDemand]: 558/574 looper letters, 209 selfloop transitions, 43 changer transitions 0/252 dead transitions. [2023-08-30 06:14:27,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 252 transitions, 1919 flow [2023-08-30 06:14:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:14:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:14:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2706 transitions. [2023-08-30 06:14:27,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-08-30 06:14:27,925 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2706 transitions. [2023-08-30 06:14:27,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2706 transitions. [2023-08-30 06:14:27,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:27,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2706 transitions. [2023-08-30 06:14:27,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states 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 06:14:27,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 574.0) internal successors, (8610), 15 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states 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 06:14:27,941 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 574.0) internal successors, (8610), 15 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states 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 06:14:27,941 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 613 flow. Second operand 14 states and 2706 transitions. [2023-08-30 06:14:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 252 transitions, 1919 flow [2023-08-30 06:14:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 252 transitions, 1918 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:14:27,952 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1050 flow [2023-08-30 06:14:27,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1050, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2023-08-30 06:14:27,953 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 31 predicate places. [2023-08-30 06:14:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1050 flow [2023-08-30 06:14:27,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.6) internal successors, (1836), 10 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 06:14:27,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:27,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:14:27,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:28,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:28,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:14:28,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255225, now seen corresponding path program 1 times [2023-08-30 06:14:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107490786] [2023-08-30 06:14:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:28,165 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 06:14:28,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:28,166 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:28,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:14:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:14:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:28,405 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:14:28,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:14:28,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 06:14:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:28,469 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 06:14:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:28,530 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 06:14:28,668 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 06:14:28,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:14:28,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107490786] [2023-08-30 06:14:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107490786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:14:28,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:14:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:14:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444274809] [2023-08-30 06:14:28,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:14:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:14:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:14:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:14:29,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 574 [2023-08-30 06:14:29,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1050 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 06:14:29,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:29,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 574 [2023-08-30 06:14:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:41,233 INFO L130 PetriNetUnfolder]: 75360/107808 cut-off events. [2023-08-30 06:14:41,234 INFO L131 PetriNetUnfolder]: For 22177/22177 co-relation queries the response was YES. [2023-08-30 06:14:41,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268132 conditions, 107808 events. 75360/107808 cut-off events. For 22177/22177 co-relation queries the response was YES. Maximal size of possible extension queue 3377. Compared 752397 event pairs, 63620 based on Foata normal form. 0/59268 useless extension candidates. Maximal degree in co-relation 268098. Up to 107808 conditions per place. [2023-08-30 06:14:42,083 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 128 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-08-30 06:14:42,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1304 flow [2023-08-30 06:14:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:14:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:14:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-08-30 06:14:42,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245063879210221 [2023-08-30 06:14:42,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-08-30 06:14:42,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-08-30 06:14:42,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:42,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-08-30 06:14:42,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 06:14:42,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:14:42,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:14:42,090 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1050 flow. Second operand 3 states and 731 transitions. [2023-08-30 06:14:42,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1304 flow [2023-08-30 06:14:42,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 129 transitions, 1289 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:14:42,258 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1033 flow [2023-08-30 06:14:42,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1033, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2023-08-30 06:14:42,259 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2023-08-30 06:14:42,259 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1033 flow [2023-08-30 06:14:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states 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 06:14:42,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:42,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:14:42,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:42,470 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:14:42,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -433575514, now seen corresponding path program 1 times [2023-08-30 06:14:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156796768] [2023-08-30 06:14:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:42,470 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 06:14:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:42,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:42,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:14:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:14:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:42,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:14:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:14:42,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:14:42,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:42,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156796768] [2023-08-30 06:14:42,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156796768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:14:42,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:14:42,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:14:42,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783424272] [2023-08-30 06:14:42,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:14:42,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:14:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:14:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:14:42,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 574 [2023-08-30 06:14:42,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1033 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 06:14:42,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:42,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 574 [2023-08-30 06:14:42,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:52,138 INFO L130 PetriNetUnfolder]: 58920/84528 cut-off events. [2023-08-30 06:14:52,138 INFO L131 PetriNetUnfolder]: For 18202/18202 co-relation queries the response was YES. [2023-08-30 06:14:52,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213397 conditions, 84528 events. 58920/84528 cut-off events. For 18202/18202 co-relation queries the response was YES. Maximal size of possible extension queue 2622. Compared 574020 event pairs, 48960 based on Foata normal form. 0/49428 useless extension candidates. Maximal degree in co-relation 213362. Up to 84364 conditions per place. [2023-08-30 06:14:52,789 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 113 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2023-08-30 06:14:52,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 127 transitions, 1283 flow [2023-08-30 06:14:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:14:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:14:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-30 06:14:52,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2023-08-30 06:14:52,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-30 06:14:52,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-30 06:14:52,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:52,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-30 06:14:52,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 06:14:52,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 06:14:52,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states 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 06:14:52,796 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1033 flow. Second operand 4 states and 928 transitions. [2023-08-30 06:14:52,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 127 transitions, 1283 flow [2023-08-30 06:14:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:14:52,927 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1056 flow [2023-08-30 06:14:52,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1056, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2023-08-30 06:14:52,927 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 30 predicate places. [2023-08-30 06:14:52,928 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1056 flow [2023-08-30 06:14:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 06:14:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:52,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:14:52,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:14:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:53,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:14:53,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash -433575513, now seen corresponding path program 1 times [2023-08-30 06:14:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177515994] [2023-08-30 06:14:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:53,140 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 06:14:53,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:53,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:53,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:14:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:14:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:14:53,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:14:53,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177515994] [2023-08-30 06:14:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177515994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:14:53,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:14:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:14:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025240169] [2023-08-30 06:14:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:14:53,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:14:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:14:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:14:53,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-30 06:14:53,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 06:14:53,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:53,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-30 06:14:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:15:07,045 INFO L130 PetriNetUnfolder]: 89880/128528 cut-off events. [2023-08-30 06:15:07,045 INFO L131 PetriNetUnfolder]: For 33549/33549 co-relation queries the response was YES. [2023-08-30 06:15:07,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325312 conditions, 128528 events. 89880/128528 cut-off events. For 33549/33549 co-relation queries the response was YES. Maximal size of possible extension queue 3829. Compared 922609 event pairs, 37780 based on Foata normal form. 2860/75428 useless extension candidates. Maximal degree in co-relation 325276. Up to 70181 conditions per place. [2023-08-30 06:15:08,057 INFO L137 encePairwiseOnDemand]: 569/574 looper letters, 150 selfloop transitions, 3 changer transitions 0/153 dead transitions. [2023-08-30 06:15:08,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1462 flow [2023-08-30 06:15:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:15:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:15:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-30 06:15:08,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44889663182346107 [2023-08-30 06:15:08,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-30 06:15:08,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-30 06:15:08,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:08,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-30 06:15:08,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 06:15:08,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:08,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:08,064 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1056 flow. Second operand 3 states and 773 transitions. [2023-08-30 06:15:08,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1462 flow [2023-08-30 06:15:08,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1447 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:15:08,255 INFO L231 Difference]: Finished difference. Result has 99 places, 129 transitions, 1062 flow [2023-08-30 06:15:08,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1062, PETRI_PLACES=99, PETRI_TRANSITIONS=129} [2023-08-30 06:15:08,256 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 31 predicate places. [2023-08-30 06:15:08,256 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 129 transitions, 1062 flow [2023-08-30 06:15:08,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 06:15:08,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:08,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:08,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:15:08,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:08,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:15:08,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -553477236, now seen corresponding path program 1 times [2023-08-30 06:15:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248250413] [2023-08-30 06:15:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:08,470 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 06:15:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:08,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:15:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:15:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:15:08,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:15:08,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:08,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248250413] [2023-08-30 06:15:08,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248250413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:15:08,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:15:08,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:15:08,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273210226] [2023-08-30 06:15:08,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:15:08,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:15:08,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:15:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:15:08,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-30 06:15:08,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 129 transitions, 1062 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 06:15:08,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:08,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-30 06:15:08,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:15:19,672 INFO L130 PetriNetUnfolder]: 67320/98688 cut-off events. [2023-08-30 06:15:19,672 INFO L131 PetriNetUnfolder]: For 28682/28682 co-relation queries the response was YES. [2023-08-30 06:15:20,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262513 conditions, 98688 events. 67320/98688 cut-off events. For 28682/28682 co-relation queries the response was YES. Maximal size of possible extension queue 2924. Compared 717258 event pairs, 19480 based on Foata normal form. 4160/60328 useless extension candidates. Maximal degree in co-relation 262476. Up to 81161 conditions per place. [2023-08-30 06:15:20,435 INFO L137 encePairwiseOnDemand]: 566/574 looper letters, 147 selfloop transitions, 3 changer transitions 0/150 dead transitions. [2023-08-30 06:15:20,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1444 flow [2023-08-30 06:15:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:15:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:15:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-30 06:15:20,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465737514518002 [2023-08-30 06:15:20,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-30 06:15:20,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-30 06:15:20,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:20,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-30 06:15:20,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 06:15:20,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:20,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:20,440 INFO L175 Difference]: Start difference. First operand has 99 places, 129 transitions, 1062 flow. Second operand 3 states and 769 transitions. [2023-08-30 06:15:20,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1444 flow [2023-08-30 06:15:20,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:15:20,590 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1090 flow [2023-08-30 06:15:20,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1090, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2023-08-30 06:15:20,591 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2023-08-30 06:15:20,591 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1090 flow [2023-08-30 06:15:20,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 06:15:20,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:20,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:20,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:15:20,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:20,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:15:20,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:20,793 INFO L85 PathProgramCache]: Analyzing trace with hash 940356316, now seen corresponding path program 1 times [2023-08-30 06:15:20,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751520552] [2023-08-30 06:15:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:20,793 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 06:15:20,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:20,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:15:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:15:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:20,922 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 06:15:20,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:15:20,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:20,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751520552] [2023-08-30 06:15:20,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751520552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:15:20,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:15:20,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:15:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501162805] [2023-08-30 06:15:20,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:15:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:15:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:15:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:15:20,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-30 06:15:20,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1090 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 06:15:20,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:20,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-30 06:15:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:15:30,130 INFO L130 PetriNetUnfolder]: 51880/77688 cut-off events. [2023-08-30 06:15:30,130 INFO L131 PetriNetUnfolder]: For 32722/32722 co-relation queries the response was YES. [2023-08-30 06:15:30,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227515 conditions, 77688 events. 51880/77688 cut-off events. For 32722/32722 co-relation queries the response was YES. Maximal size of possible extension queue 2360. Compared 562974 event pairs, 22500 based on Foata normal form. 1500/44628 useless extension candidates. Maximal degree in co-relation 227476. Up to 67661 conditions per place. [2023-08-30 06:15:30,747 INFO L137 encePairwiseOnDemand]: 567/574 looper letters, 145 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2023-08-30 06:15:30,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1474 flow [2023-08-30 06:15:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:15:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:15:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-08-30 06:15:30,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2023-08-30 06:15:30,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-08-30 06:15:30,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-08-30 06:15:30,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:30,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-08-30 06:15:30,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 06:15:30,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:30,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 06:15:30,752 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1090 flow. Second operand 3 states and 768 transitions. [2023-08-30 06:15:30,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1474 flow [2023-08-30 06:15:30,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:15:30,943 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1112 flow [2023-08-30 06:15:30,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1112, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2023-08-30 06:15:30,943 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-08-30 06:15:30,943 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1112 flow [2023-08-30 06:15:30,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 06:15:30,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:30,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:30,953 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 (17)] Ended with exit code 0 [2023-08-30 06:15:31,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:31,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:15:31,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1576424810, now seen corresponding path program 1 times [2023-08-30 06:15:31,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:31,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090681436] [2023-08-30 06:15:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:31,154 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 06:15:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:31,155 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:31,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:15:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:15:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:31,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:15:31,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:15:31,646 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:15:31,647 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:15:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:15:32,024 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 19 treesize of output 19 [2023-08-30 06:15:32,083 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:15:32,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:15:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:15:32,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:15:32,198 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:15:32,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:15:32,343 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 06:15:32,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:15:49,475 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:15:54,250 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 06:15:54,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090681436] [2023-08-30 06:15:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090681436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:15:54,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:15:54,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 06:15:54,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053133017] [2023-08-30 06:15:54,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:15:54,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:15:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:15:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:15:56,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:15:58,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:02,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:04,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:08,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:09,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:15,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:22,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:28,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:31,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:32,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:37,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:46,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:48,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:56,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:04,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:06,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:13,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:18,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:25,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:28,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:30,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:33,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:37,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:17:37,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 574 [2023-08-30 06:17:37,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1112 flow. Second operand has 16 states, 16 states have (on average 180.375) internal successors, (2886), 16 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states 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 06:17:37,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:37,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 574 [2023-08-30 06:17:37,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:18:04,219 WARN L222 SmtUtils]: Spent 26.42s on a formula simplification. DAG size of input: 105 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:18:06,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:08,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:10,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:12,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:14,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:16,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:47,664 WARN L222 SmtUtils]: Spent 29.82s on a formula simplification. DAG size of input: 103 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:18:51,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:53,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:55,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:18:57,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:15,031 WARN L222 SmtUtils]: Spent 16.64s on a formula simplification. DAG size of input: 96 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:19:17,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:19,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:20,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:22,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:33,825 WARN L222 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 88 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:19:37,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:39,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:50,058 WARN L222 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:19:56,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:19:58,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:01,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:07,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:09,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:12,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:15,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:20:28,160 WARN L222 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:20:45,652 WARN L222 SmtUtils]: Spent 7.65s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:21:07,389 INFO L130 PetriNetUnfolder]: 78007/117238 cut-off events. [2023-08-30 06:21:07,389 INFO L131 PetriNetUnfolder]: For 78267/78267 co-relation queries the response was YES. [2023-08-30 06:21:08,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368474 conditions, 117238 events. 78007/117238 cut-off events. For 78267/78267 co-relation queries the response was YES. Maximal size of possible extension queue 2578. Compared 879917 event pairs, 53210 based on Foata normal form. 3800/69838 useless extension candidates. Maximal degree in co-relation 368433. Up to 57861 conditions per place. [2023-08-30 06:21:08,432 INFO L137 encePairwiseOnDemand]: 557/574 looper letters, 310 selfloop transitions, 67 changer transitions 0/377 dead transitions. [2023-08-30 06:21:08,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 377 transitions, 3435 flow [2023-08-30 06:21:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:21:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:21:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4694 transitions. [2023-08-30 06:21:08,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271080139372822 [2023-08-30 06:21:08,441 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4694 transitions. [2023-08-30 06:21:08,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4694 transitions. [2023-08-30 06:21:08,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:08,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4694 transitions. [2023-08-30 06:21:08,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 187.76) internal successors, (4694), 25 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states 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 06:21:08,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 574.0) internal successors, (14924), 26 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states 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 06:21:08,463 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 574.0) internal successors, (14924), 26 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states 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 06:21:08,464 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1112 flow. Second operand 25 states and 4694 transitions. [2023-08-30 06:21:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 377 transitions, 3435 flow [2023-08-30 06:21:08,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 377 transitions, 3426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:08,810 INFO L231 Difference]: Finished difference. Result has 133 places, 171 transitions, 1839 flow [2023-08-30 06:21:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1839, PETRI_PLACES=133, PETRI_TRANSITIONS=171} [2023-08-30 06:21:08,811 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2023-08-30 06:21:08,811 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 171 transitions, 1839 flow [2023-08-30 06:21:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 180.375) internal successors, (2886), 16 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states 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 06:21:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:08,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:09,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:21:09,019 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:21:09,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash 811714020, now seen corresponding path program 1 times [2023-08-30 06:21:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:21:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052833277] [2023-08-30 06:21:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:09,019 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 06:21:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:21:09,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:21:09,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:21:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:21:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:21:09,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:21:09,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:21:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052833277] [2023-08-30 06:21:09,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052833277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:09,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:09,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:21:09,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772224981] [2023-08-30 06:21:09,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:09,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:21:09,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:21:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:21:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:21:09,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 574 [2023-08-30 06:21:09,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 171 transitions, 1839 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 06:21:09,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:09,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 574 [2023-08-30 06:21:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand