./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.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-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --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 07:15:26,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:15:26,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:15:26,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:15:26,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:15:26,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:15:26,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:15:26,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:15:26,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:15:26,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:15:26,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:15:26,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:15:26,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:15:26,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:15:26,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:15:26,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:15:26,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:15:26,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:15:26,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:15:26,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:15:26,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:15:26,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:15:26,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:15:26,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:15:26,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:15:26,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:15:26,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:15:26,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:15:26,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:15:26,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:15:26,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:15:26,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:15:26,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:15:26,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:15:26,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:15:26,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:15:26,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:15:26,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:15:26,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:15:26,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:15:26,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:15:26,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:15:26,791 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:15:26,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:15:26,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:15:26,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:15:26,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:15:26,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:15:26,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:15:26,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:15:26,795 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:15:26,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:15:26,795 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:15:26,796 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:15:26,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:15:26,797 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:15:26,797 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:15:26,797 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:15:26,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:15:26,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:15:26,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:15:26,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:15:26,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:15:26,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:15:26,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:15:26,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:15:26,799 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:15:26,799 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:15:26,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:15:26,799 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:15:26,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:15:27,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:15:27,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:15:27,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:15:27,092 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:15:27,093 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:15:27,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 07:15:28,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:15:28,526 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:15:28,529 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 07:15:28,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8c1456e/a88e13dfeddd4c7ca56e4fac7d5acdec/FLAG18fe6af09 [2023-08-30 07:15:28,549 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8c1456e/a88e13dfeddd4c7ca56e4fac7d5acdec [2023-08-30 07:15:28,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:15:28,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:15:28,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:15:28,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:15:28,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:15:28,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:15:28" (1/1) ... [2023-08-30 07:15:28,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253ce193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:28, skipping insertion in model container [2023-08-30 07:15:28,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:15:28" (1/1) ... [2023-08-30 07:15:28,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:15:28,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:15:28,764 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-queue-add-2.wvr.c[2696,2709] [2023-08-30 07:15:28,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:15:28,786 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 07:15:28,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cdc756c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:28, skipping insertion in model container [2023-08-30 07:15:28,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:15:28,788 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:15:28,790 INFO L158 Benchmark]: Toolchain (without parser) took 236.23ms. Allocated memory is still 75.5MB. Free memory was 53.9MB in the beginning and 43.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:15:28,790 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:15:28,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.70ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 43.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:15:28,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.70ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 43.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --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 07:15:30,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:15:30,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:15:30,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:15:30,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:15:30,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:15:30,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:15:30,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:15:30,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:15:30,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:15:30,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:15:30,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:15:30,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:15:30,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:15:30,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:15:30,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:15:30,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:15:30,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:15:30,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:15:30,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:15:30,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:15:30,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:15:30,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:15:30,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:15:30,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:15:30,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:15:30,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:15:30,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:15:30,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:15:30,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:15:30,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:15:30,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:15:30,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:15:30,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:15:30,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:15:30,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:15:30,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:15:30,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:15:30,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:15:30,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:15:30,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:15:30,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:15:30,525 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:15:30,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:15:30,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:15:30,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:15:30,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:15:30,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:15:30,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:15:30,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:15:30,528 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:15:30,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:15:30,528 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:15:30,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:15:30,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:15:30,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:15:30,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:15:30,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:15:30,530 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:15:30,530 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:15:30,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:15:30,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:15:30,531 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:15:30,531 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:15:30,531 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:15:30,531 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:15:30,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:15:30,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:15:30,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:15:30,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:15:30,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:15:30,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:15:30,533 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:15:30,533 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:15:30,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:15:30,534 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:15:30,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:15:30,534 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:15:30,535 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:15:30,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:15:30,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:15:30,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:15:30,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:15:30,818 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:15:30,818 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:15:30,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 07:15:32,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:15:32,250 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:15:32,251 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-30 07:15:32,256 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2507f37a/3bf60dfb5a854e6ca8deccdc255f828b/FLAGb1653afd6 [2023-08-30 07:15:32,270 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2507f37a/3bf60dfb5a854e6ca8deccdc255f828b [2023-08-30 07:15:32,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:15:32,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:15:32,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:15:32,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:15:32,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:15:32,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628e13a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32, skipping insertion in model container [2023-08-30 07:15:32,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:15:32,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:15:32,419 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-08-30 07:15:32,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:15:32,436 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:15:32,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:15:32,448 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-queue-add-2.wvr.c[2696,2709] [2023-08-30 07:15:32,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:15:32,455 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:15:32,476 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-queue-add-2.wvr.c[2696,2709] [2023-08-30 07:15:32,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:15:32,490 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:15:32,504 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:15:32,510 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:15:32,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32 WrapperNode [2023-08-30 07:15:32,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:15:32,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:15:32,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:15:32,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:15:32,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,581 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2023-08-30 07:15:32,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:15:32,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:15:32,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:15:32,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:15:32,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:15:32,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:15:32,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:15:32,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:15:32,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (1/1) ... [2023-08-30 07:15:32,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:15:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:15:32,674 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 07:15:32,691 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 07:15:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:15:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:15:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:15:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:15:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:15:32,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:15:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:15:32,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:15:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:15:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:15:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:15:32,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:15:32,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:15:32,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:15:32,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:15:32,708 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 07:15:32,861 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:15:32,863 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:15:33,268 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:15:33,358 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:15:33,359 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:15:33,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:15:33 BoogieIcfgContainer [2023-08-30 07:15:33,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:15:33,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:15:33,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:15:33,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:15:33,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:15:32" (1/3) ... [2023-08-30 07:15:33,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8902d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:15:33, skipping insertion in model container [2023-08-30 07:15:33,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:15:32" (2/3) ... [2023-08-30 07:15:33,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8902d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:15:33, skipping insertion in model container [2023-08-30 07:15:33,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:15:33" (3/3) ... [2023-08-30 07:15:33,368 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-30 07:15:33,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:15:33,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 07:15:33,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:15:33,448 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:15:33,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 07:15:33,554 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-08-30 07:15:33,555 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:15:33,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 100. Up to 3 conditions per place. [2023-08-30 07:15:33,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-08-30 07:15:33,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-30 07:15:33,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:15:33,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 07:15:33,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-30 07:15:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-30 07:15:33,601 INFO L130 PetriNetUnfolder]: 11/138 cut-off events. [2023-08-30 07:15:33,604 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:15:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 100. Up to 3 conditions per place. [2023-08-30 07:15:33,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2023-08-30 07:15:45,179 INFO L134 LiptonReduction]: Checked pairs total: 1347 [2023-08-30 07:15:45,180 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-30 07:15:45,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:15:45,200 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;@4725bf01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:15:45,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 07:15:45,208 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:15:45,208 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:15:45,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:45,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:15:45,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:45,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash 21057, now seen corresponding path program 1 times [2023-08-30 07:15:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192905883] [2023-08-30 07:15:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:45,222 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 07:15:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:45,224 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 07:15:45,229 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 07:15:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:15:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:45,475 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:15:45,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:15:45,499 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 07:15:45,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:45,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192905883] [2023-08-30 07:15:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192905883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:45,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:45,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:45,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762977749] [2023-08-30 07:15:45,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:45,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:45,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:45,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:45,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:45,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:46,060 INFO L130 PetriNetUnfolder]: 909/1300 cut-off events. [2023-08-30 07:15:46,060 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 07:15:46,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2633 conditions, 1300 events. 909/1300 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 6232 event pairs, 419 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 1197. Up to 648 conditions per place. [2023-08-30 07:15:46,068 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-30 07:15:46,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 268 flow [2023-08-30 07:15:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 07:15:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47079037800687284 [2023-08-30 07:15:46,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 07:15:46,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 07:15:46,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:46,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 07:15:46,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 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 07:15:46,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:46,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:46,094 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 411 transitions. [2023-08-30 07:15:46,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 268 flow [2023-08-30 07:15:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:15:46,099 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 82 flow [2023-08-30 07:15:46,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-30 07:15:46,102 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-30 07:15:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 82 flow [2023-08-30 07:15:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:46,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:15:46,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:15:46,309 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 07:15:46,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:46,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 21056, now seen corresponding path program 1 times [2023-08-30 07:15:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021101425] [2023-08-30 07:15:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:46,311 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 07:15:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:46,312 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 07:15:46,314 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 07:15:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:15:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:46,386 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:15:46,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:15:46,398 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 07:15:46,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:46,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:46,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021101425] [2023-08-30 07:15:46,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021101425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:46,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:46,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131607992] [2023-08-30 07:15:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:46,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:46,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:46,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:46,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:46,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:46,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:46,634 INFO L130 PetriNetUnfolder]: 921/1310 cut-off events. [2023-08-30 07:15:46,634 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:15:46,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2631 conditions, 1310 events. 921/1310 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 6160 event pairs, 422 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 1313. Up to 1296 conditions per place. [2023-08-30 07:15:46,639 INFO L137 encePairwiseOnDemand]: 289/291 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 07:15:46,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 142 flow [2023-08-30 07:15:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-30 07:15:46,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434135166093929 [2023-08-30 07:15:46,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-30 07:15:46,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-30 07:15:46,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:46,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-30 07:15:46,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 07:15:46,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:46,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:46,645 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 82 flow. Second operand 3 states and 379 transitions. [2023-08-30 07:15:46,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 142 flow [2023-08-30 07:15:46,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:46,646 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 80 flow [2023-08-30 07:15:46,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-30 07:15:46,647 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-30 07:15:46,647 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 80 flow [2023-08-30 07:15:46,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:46,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:46,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:15:46,659 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 07:15:46,854 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 07:15:46,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:46,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 21112, now seen corresponding path program 1 times [2023-08-30 07:15:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394011839] [2023-08-30 07:15:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:46,856 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 07:15:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:46,858 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 07:15:46,860 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 07:15:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:46,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:15:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:46,935 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 07:15:46,935 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 22 treesize of output 29 [2023-08-30 07:15:46,958 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 07:15:46,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:46,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:46,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394011839] [2023-08-30 07:15:46,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394011839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:46,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:46,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169998068] [2023-08-30 07:15:46,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:46,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:46,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:47,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:47,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:47,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:47,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:47,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:47,190 INFO L130 PetriNetUnfolder]: 701/1018 cut-off events. [2023-08-30 07:15:47,190 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:15:47,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2047 conditions, 1018 events. 701/1018 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 4732 event pairs, 318 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 2039. Up to 1004 conditions per place. [2023-08-30 07:15:47,194 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 07:15:47,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-08-30 07:15:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-30 07:15:47,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329896907216495 [2023-08-30 07:15:47,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-30 07:15:47,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-30 07:15:47,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:47,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-30 07:15:47,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 07:15:47,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:47,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:47,199 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 80 flow. Second operand 3 states and 378 transitions. [2023-08-30 07:15:47,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-08-30 07:15:47,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:47,200 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-08-30 07:15:47,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 07:15:47,201 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 07:15:47,201 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-08-30 07:15:47,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:47,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:47,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:15:47,210 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 07:15:47,408 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 07:15:47,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:47,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 21114, now seen corresponding path program 1 times [2023-08-30 07:15:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:47,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244031244] [2023-08-30 07:15:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:47,410 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 07:15:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:47,412 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 07:15:47,414 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 07:15:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:47,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:15:47,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:15:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:15:47,505 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:15:47,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 07:15:47,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 07:15:47,536 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 07:15:47,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:47,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:47,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244031244] [2023-08-30 07:15:47,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244031244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:47,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:47,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:47,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903220012] [2023-08-30 07:15:47,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:47,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:47,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:47,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:47,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:47,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:47,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:47,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:47,723 INFO L130 PetriNetUnfolder]: 481/726 cut-off events. [2023-08-30 07:15:47,724 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:15:47,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 726 events. 481/726 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3301 event pairs, 214 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 1455. Up to 712 conditions per place. [2023-08-30 07:15:47,726 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 07:15:47,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2023-08-30 07:15:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-30 07:15:47,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306987399770905 [2023-08-30 07:15:47,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-30 07:15:47,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-30 07:15:47,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:47,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-30 07:15:47,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 07:15:47,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:47,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:47,731 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 376 transitions. [2023-08-30 07:15:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2023-08-30 07:15:47,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:47,731 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2023-08-30 07:15:47,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-30 07:15:47,732 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-30 07:15:47,732 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2023-08-30 07:15:47,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 07:15:47,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:47,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:15:47,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:15:47,939 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 07:15:47,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:47,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash 654542, now seen corresponding path program 1 times [2023-08-30 07:15:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:47,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994312295] [2023-08-30 07:15:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:47,940 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 07:15:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:47,941 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 07:15:47,943 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 07:15:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:15:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:48,048 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:15:48,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:15:48,094 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 07:15:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:15:48,228 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 07:15:48,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:48,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994312295] [2023-08-30 07:15:48,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994312295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:15:48,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:15:48,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:15:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179100334] [2023-08-30 07:15:48,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:15:48,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:15:48,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:48,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:15:48,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:15:48,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2023-08-30 07:15:48,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:48,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:48,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2023-08-30 07:15:48,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:48,940 INFO L130 PetriNetUnfolder]: 703/1072 cut-off events. [2023-08-30 07:15:48,940 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:15:48,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 1072 events. 703/1072 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5358 event pairs, 319 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 2149. Up to 355 conditions per place. [2023-08-30 07:15:48,944 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-08-30 07:15:48,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2023-08-30 07:15:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:15:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:15:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 747 transitions. [2023-08-30 07:15:48,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42783505154639173 [2023-08-30 07:15:48,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 747 transitions. [2023-08-30 07:15:48,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 747 transitions. [2023-08-30 07:15:48,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:48,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 747 transitions. [2023-08-30 07:15:48,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.5) internal successors, (747), 6 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 07:15:48,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:15:48,951 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:15:48,951 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 747 transitions. [2023-08-30 07:15:48,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2023-08-30 07:15:48,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:48,952 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2023-08-30 07:15:48,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-30 07:15:48,953 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 07:15:48,953 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2023-08-30 07:15:48,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:15:48,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:48,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:15:48,962 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 07:15:49,160 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 07:15:49,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:49,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash 20305033, now seen corresponding path program 1 times [2023-08-30 07:15:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:49,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315754833] [2023-08-30 07:15:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:49,162 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 07:15:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:49,178 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 07:15:49,180 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 07:15:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:15:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:15:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:15:49,249 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:15:49,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 07:15:49,253 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 07:15:49,267 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 07:15:49,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:49,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315754833] [2023-08-30 07:15:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315754833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:49,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:49,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:49,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135939553] [2023-08-30 07:15:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:49,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:49,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 07:15:49,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:49,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:49,457 INFO L130 PetriNetUnfolder]: 666/999 cut-off events. [2023-08-30 07:15:49,457 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 07:15:49,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 999 events. 666/999 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 4795 event pairs, 294 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 2026. Up to 978 conditions per place. [2023-08-30 07:15:49,461 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 07:15:49,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2023-08-30 07:15:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-30 07:15:49,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284077892325315 [2023-08-30 07:15:49,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-30 07:15:49,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-30 07:15:49,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:49,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-30 07:15:49,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 07:15:49,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:49,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:49,466 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 374 transitions. [2023-08-30 07:15:49,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2023-08-30 07:15:49,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:49,467 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2023-08-30 07:15:49,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-30 07:15:49,468 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-30 07:15:49,468 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2023-08-30 07:15:49,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 07:15:49,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:49,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:15:49,483 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 07:15:49,675 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 07:15:49,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:49,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 20305035, now seen corresponding path program 1 times [2023-08-30 07:15:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124038213] [2023-08-30 07:15:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:49,677 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 07:15:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:49,677 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 07:15:49,706 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 07:15:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:15:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:49,749 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 07:15:49,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 07:15:49,762 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 07:15:49,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:49,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124038213] [2023-08-30 07:15:49,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124038213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:49,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:49,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:15:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596056485] [2023-08-30 07:15:49,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:15:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:49,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:15:49,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:15:49,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:15:49,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 07:15:49,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:49,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:15:49,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:49,934 INFO L130 PetriNetUnfolder]: 609/906 cut-off events. [2023-08-30 07:15:49,934 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 07:15:49,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 906 events. 609/906 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 4250 event pairs, 267 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 1836. Up to 885 conditions per place. [2023-08-30 07:15:49,938 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 07:15:49,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2023-08-30 07:15:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:15:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:15:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-30 07:15:49,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41580756013745707 [2023-08-30 07:15:49,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-30 07:15:49,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-30 07:15:49,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:49,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-30 07:15:49,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 07:15:49,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:49,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 07:15:49,942 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 363 transitions. [2023-08-30 07:15:49,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2023-08-30 07:15:49,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:49,943 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2023-08-30 07:15:49,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 07:15:49,943 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 07:15:49,944 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2023-08-30 07:15:49,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 07:15:49,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:49,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:15:49,952 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 07:15:50,150 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 07:15:50,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:50,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash 629452168, now seen corresponding path program 1 times [2023-08-30 07:15:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:50,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490036520] [2023-08-30 07:15:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:50,153 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 07:15:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:50,154 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 07:15:50,157 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 07:15:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:15:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:50,230 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 07:15:50,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:15:50,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:50,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490036520] [2023-08-30 07:15:50,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490036520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:15:50,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:15:50,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:15:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382223093] [2023-08-30 07:15:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:15:50,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:15:50,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:15:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:15:50,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:15:50,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 07:15:50,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:50,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:15:50,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:50,444 INFO L130 PetriNetUnfolder]: 387/594 cut-off events. [2023-08-30 07:15:50,445 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 07:15:50,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 594 events. 387/594 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 2607 event pairs, 176 based on Foata normal form. 5/239 useless extension candidates. Maximal degree in co-relation 1209. Up to 571 conditions per place. [2023-08-30 07:15:50,447 INFO L137 encePairwiseOnDemand]: 278/291 looper letters, 26 selfloop transitions, 2 changer transitions 5/35 dead transitions. [2023-08-30 07:15:50,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 194 flow [2023-08-30 07:15:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:15:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:15:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-30 07:15:50,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43127147766323026 [2023-08-30 07:15:50,449 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-30 07:15:50,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-30 07:15:50,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:50,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-30 07:15:50,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 07:15:50,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:15:50,451 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:15:50,452 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 502 transitions. [2023-08-30 07:15:50,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 194 flow [2023-08-30 07:15:50,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:15:50,453 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 139 flow [2023-08-30 07:15:50,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-08-30 07:15:50,453 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-30 07:15:50,453 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 139 flow [2023-08-30 07:15:50,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 07:15:50,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:50,454 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:15:50,464 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 07:15:50,660 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 07:15:50,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:50,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1973613183, now seen corresponding path program 2 times [2023-08-30 07:15:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:50,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924479003] [2023-08-30 07:15:50,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:15:50,662 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 07:15:50,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:50,662 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 07:15:50,664 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 07:15:50,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:15:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:15:50,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:15:50,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:50,757 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:15:50,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:15:50,865 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 07:15:50,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:15:51,307 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 07:15:51,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924479003] [2023-08-30 07:15:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924479003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:15:51,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:15:51,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:15:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001226083] [2023-08-30 07:15:51,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:15:51,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:15:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:15:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:15:52,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2023-08-30 07:15:52,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 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 07:15:52,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:52,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2023-08-30 07:15:52,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:15:55,431 INFO L130 PetriNetUnfolder]: 1740/2625 cut-off events. [2023-08-30 07:15:55,431 INFO L131 PetriNetUnfolder]: For 307/307 co-relation queries the response was YES. [2023-08-30 07:15:55,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7362 conditions, 2625 events. 1740/2625 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14150 event pairs, 793 based on Foata normal form. 6/1002 useless extension candidates. Maximal degree in co-relation 7342. Up to 2045 conditions per place. [2023-08-30 07:15:55,443 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 173 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2023-08-30 07:15:55,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 187 transitions, 1069 flow [2023-08-30 07:15:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:15:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:15:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1535 transitions. [2023-08-30 07:15:55,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395761741122566 [2023-08-30 07:15:55,447 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1535 transitions. [2023-08-30 07:15:55,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1535 transitions. [2023-08-30 07:15:55,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:15:55,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1535 transitions. [2023-08-30 07:15:55,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.91666666666667) internal successors, (1535), 12 states have internal predecessors, (1535), 0 states have call successors, (0), 0 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 07:15:55,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:15:55,455 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:15:55,455 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 139 flow. Second operand 12 states and 1535 transitions. [2023-08-30 07:15:55,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 187 transitions, 1069 flow [2023-08-30 07:15:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 187 transitions, 1063 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 07:15:55,459 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 231 flow [2023-08-30 07:15:55,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=231, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-08-30 07:15:55,459 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-30 07:15:55,459 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 231 flow [2023-08-30 07:15:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 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 07:15:55,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:15:55,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:15:55,469 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 07:15:55,667 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 07:15:55,667 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:15:55,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:15:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1973232677, now seen corresponding path program 1 times [2023-08-30 07:15:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:15:55,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327408955] [2023-08-30 07:15:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:15:55,668 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 07:15:55,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:15:55,669 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 07:15:55,700 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 07:15:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:15:55,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:15:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:15:55,766 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:15:55,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:15:55,900 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 07:15:55,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:15:56,331 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 07:15:56,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:15:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327408955] [2023-08-30 07:15:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327408955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:15:56,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:15:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:15:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418209151] [2023-08-30 07:15:56,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:15:56,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:15:56,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:15:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:15:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:15:58,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-08-30 07:15:58,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 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 07:15:58,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:15:58,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-08-30 07:15:58,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:00,545 INFO L130 PetriNetUnfolder]: 1479/2256 cut-off events. [2023-08-30 07:16:00,546 INFO L131 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2023-08-30 07:16:00,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6354 conditions, 2256 events. 1479/2256 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11946 event pairs, 670 based on Foata normal form. 0/903 useless extension candidates. Maximal degree in co-relation 6327. Up to 1739 conditions per place. [2023-08-30 07:16:00,564 INFO L137 encePairwiseOnDemand]: 284/291 looper letters, 55 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2023-08-30 07:16:00,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 467 flow [2023-08-30 07:16:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:16:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:16:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1028 transitions. [2023-08-30 07:16:00,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39251622756777393 [2023-08-30 07:16:00,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1028 transitions. [2023-08-30 07:16:00,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1028 transitions. [2023-08-30 07:16:00,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:00,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1028 transitions. [2023-08-30 07:16:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.22222222222223) internal successors, (1028), 9 states have internal predecessors, (1028), 0 states have call successors, (0), 0 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 07:16:00,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:16:00,573 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:16:00,573 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 231 flow. Second operand 9 states and 1028 transitions. [2023-08-30 07:16:00,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 467 flow [2023-08-30 07:16:00,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 442 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:16:00,575 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 251 flow [2023-08-30 07:16:00,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2023-08-30 07:16:00,576 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-30 07:16:00,576 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 251 flow [2023-08-30 07:16:00,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 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 07:16:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:00,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:16:00,587 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 07:16:00,783 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 07:16:00,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:00,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1973232678, now seen corresponding path program 1 times [2023-08-30 07:16:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:00,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676858804] [2023-08-30 07:16:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:00,784 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 07:16:00,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:00,788 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 07:16:00,790 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 07:16:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:16:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:00,879 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 07:16:00,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 07:16:00,894 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 07:16:00,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:00,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:00,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676858804] [2023-08-30 07:16:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676858804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:00,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:16:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082290760] [2023-08-30 07:16:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:00,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:16:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:16:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:16:00,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 291 [2023-08-30 07:16:00,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 07:16:00,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:00,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 291 [2023-08-30 07:16:00,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:01,185 INFO L130 PetriNetUnfolder]: 824/1301 cut-off events. [2023-08-30 07:16:01,185 INFO L131 PetriNetUnfolder]: For 1210/1210 co-relation queries the response was YES. [2023-08-30 07:16:01,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 1301 events. 824/1301 cut-off events. For 1210/1210 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6430 event pairs, 345 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 4316. Up to 1249 conditions per place. [2023-08-30 07:16:01,192 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 27 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-30 07:16:01,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 35 transitions, 305 flow [2023-08-30 07:16:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-08-30 07:16:01,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106529209621993 [2023-08-30 07:16:01,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-08-30 07:16:01,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-08-30 07:16:01,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:01,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-08-30 07:16:01,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 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 07:16:01,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:01,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:01,197 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 251 flow. Second operand 4 states and 478 transitions. [2023-08-30 07:16:01,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 35 transitions, 305 flow [2023-08-30 07:16:01,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 35 transitions, 257 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 07:16:01,199 INFO L231 Difference]: Finished difference. Result has 56 places, 35 transitions, 203 flow [2023-08-30 07:16:01,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=56, PETRI_TRANSITIONS=35} [2023-08-30 07:16:01,200 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-30 07:16:01,200 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 35 transitions, 203 flow [2023-08-30 07:16:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 07:16:01,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:01,200 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 07:16:01,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 07:16:01,406 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 07:16:01,407 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:01,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2100876728, now seen corresponding path program 2 times [2023-08-30 07:16:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:01,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178367537] [2023-08-30 07:16:01,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:16:01,408 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 07:16:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:01,433 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 07:16:01,445 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 07:16:01,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:16:01,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:16:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:01,554 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:16:01,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:16:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:16:01,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:01,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178367537] [2023-08-30 07:16:01,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178367537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:01,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:01,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:16:01,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327122866] [2023-08-30 07:16:01,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:01,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:16:01,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:16:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:16:01,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:16:01,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 35 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 07:16:01,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:01,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:16:01,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:01,983 INFO L130 PetriNetUnfolder]: 387/663 cut-off events. [2023-08-30 07:16:01,983 INFO L131 PetriNetUnfolder]: For 894/894 co-relation queries the response was YES. [2023-08-30 07:16:01,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 663 events. 387/663 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2935 event pairs, 152 based on Foata normal form. 162/593 useless extension candidates. Maximal degree in co-relation 1838. Up to 626 conditions per place. [2023-08-30 07:16:01,987 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 24 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-08-30 07:16:01,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 32 transitions, 239 flow [2023-08-30 07:16:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-30 07:16:01,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40463917525773196 [2023-08-30 07:16:01,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-30 07:16:01,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-30 07:16:01,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:01,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-30 07:16:01,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 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 07:16:01,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:01,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:01,993 INFO L175 Difference]: Start difference. First operand has 56 places, 35 transitions, 203 flow. Second operand 4 states and 471 transitions. [2023-08-30 07:16:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 32 transitions, 239 flow [2023-08-30 07:16:01,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 229 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:16:01,995 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 181 flow [2023-08-30 07:16:01,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-08-30 07:16:01,996 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-30 07:16:01,996 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 181 flow [2023-08-30 07:16:01,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 07:16:01,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:01,996 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:16:02,007 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 07:16:02,205 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 07:16:02,206 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:02,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash 595843681, now seen corresponding path program 3 times [2023-08-30 07:16:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923659595] [2023-08-30 07:16:02,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:16:02,207 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 07:16:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:02,208 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 07:16:02,210 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 07:16:02,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:16:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:02,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:16:02,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:02,392 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:16:02,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:16:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:02,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:04,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923659595] [2023-08-30 07:16:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923659595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:04,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:16:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774343321] [2023-08-30 07:16:04,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:16:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:16:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:16:12,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2023-08-30 07:16:12,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 181 flow. Second operand has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 07:16:12,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:12,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2023-08-30 07:16:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:26,671 INFO L130 PetriNetUnfolder]: 930/1647 cut-off events. [2023-08-30 07:16:26,672 INFO L131 PetriNetUnfolder]: For 765/765 co-relation queries the response was YES. [2023-08-30 07:16:26,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4565 conditions, 1647 events. 930/1647 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8346 event pairs, 379 based on Foata normal form. 12/1110 useless extension candidates. Maximal degree in co-relation 4541. Up to 1097 conditions per place. [2023-08-30 07:16:26,678 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 275 selfloop transitions, 24 changer transitions 0/301 dead transitions. [2023-08-30 07:16:26,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 301 transitions, 1765 flow [2023-08-30 07:16:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:16:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:16:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2999 transitions. [2023-08-30 07:16:26,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42941008018327603 [2023-08-30 07:16:26,685 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2999 transitions. [2023-08-30 07:16:26,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2999 transitions. [2023-08-30 07:16:26,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:26,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2999 transitions. [2023-08-30 07:16:26,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 124.95833333333333) internal successors, (2999), 24 states have internal predecessors, (2999), 0 states have call successors, (0), 0 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 07:16:26,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 291.0) internal successors, (7275), 25 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 07:16:26,698 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 291.0) internal successors, (7275), 25 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 07:16:26,698 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 181 flow. Second operand 24 states and 2999 transitions. [2023-08-30 07:16:26,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 301 transitions, 1765 flow [2023-08-30 07:16:26,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 301 transitions, 1741 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:26,705 INFO L231 Difference]: Finished difference. Result has 86 places, 45 transitions, 361 flow [2023-08-30 07:16:26,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=45} [2023-08-30 07:16:26,705 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2023-08-30 07:16:26,706 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 45 transitions, 361 flow [2023-08-30 07:16:26,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 07:16:26,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:26,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:26,716 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 07:16:26,914 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 07:16:26,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:26,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1321794333, now seen corresponding path program 1 times [2023-08-30 07:16:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:26,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176391418] [2023-08-30 07:16:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:26,916 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 07:16:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:26,917 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 07:16:26,920 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 07:16:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:16:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:27,114 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 07:16:27,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:27,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176391418] [2023-08-30 07:16:27,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176391418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:27,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:27,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:16:27,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113448771] [2023-08-30 07:16:27,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:27,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:16:27,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:16:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:16:27,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 291 [2023-08-30 07:16:27,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 45 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 07:16:27,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:27,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 291 [2023-08-30 07:16:27,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:27,647 INFO L130 PetriNetUnfolder]: 1493/2819 cut-off events. [2023-08-30 07:16:27,648 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2023-08-30 07:16:27,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7566 conditions, 2819 events. 1493/2819 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16928 event pairs, 189 based on Foata normal form. 21/2042 useless extension candidates. Maximal degree in co-relation 7529. Up to 1597 conditions per place. [2023-08-30 07:16:27,656 INFO L137 encePairwiseOnDemand]: 284/291 looper letters, 54 selfloop transitions, 13 changer transitions 2/70 dead transitions. [2023-08-30 07:16:27,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 575 flow [2023-08-30 07:16:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:16:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:16:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 733 transitions. [2023-08-30 07:16:27,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198167239404353 [2023-08-30 07:16:27,659 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 733 transitions. [2023-08-30 07:16:27,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 733 transitions. [2023-08-30 07:16:27,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:27,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 733 transitions. [2023-08-30 07:16:27,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.16666666666667) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 07:16:27,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:16:27,663 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:16:27,663 INFO L175 Difference]: Start difference. First operand has 86 places, 45 transitions, 361 flow. Second operand 6 states and 733 transitions. [2023-08-30 07:16:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 575 flow [2023-08-30 07:16:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 527 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 07:16:27,666 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 386 flow [2023-08-30 07:16:27,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2023-08-30 07:16:27,666 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 46 predicate places. [2023-08-30 07:16:27,666 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 386 flow [2023-08-30 07:16:27,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 07:16:27,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:27,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:27,676 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 07:16:27,874 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 07:16:27,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:27,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash -203926958, now seen corresponding path program 1 times [2023-08-30 07:16:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:27,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857921520] [2023-08-30 07:16:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:27,875 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 07:16:27,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:27,876 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 07:16:27,878 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 07:16:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:16:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:28,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:28,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857921520] [2023-08-30 07:16:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857921520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:28,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:28,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:16:28,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280107462] [2023-08-30 07:16:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:16:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:16:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:16:28,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:16:28,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 07:16:28,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:28,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:16:28,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:28,527 INFO L130 PetriNetUnfolder]: 1063/2207 cut-off events. [2023-08-30 07:16:28,527 INFO L131 PetriNetUnfolder]: For 2419/2459 co-relation queries the response was YES. [2023-08-30 07:16:28,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7313 conditions, 2207 events. 1063/2207 cut-off events. For 2419/2459 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13492 event pairs, 200 based on Foata normal form. 240/2207 useless extension candidates. Maximal degree in co-relation 7272. Up to 1861 conditions per place. [2023-08-30 07:16:28,535 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 47 selfloop transitions, 4 changer transitions 5/58 dead transitions. [2023-08-30 07:16:28,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 58 transitions, 510 flow [2023-08-30 07:16:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-30 07:16:28,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41408934707903783 [2023-08-30 07:16:28,537 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-30 07:16:28,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-30 07:16:28,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:28,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-30 07:16:28,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 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 07:16:28,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:28,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:28,540 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 386 flow. Second operand 4 states and 482 transitions. [2023-08-30 07:16:28,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 58 transitions, 510 flow [2023-08-30 07:16:28,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 58 transitions, 488 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:28,545 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 378 flow [2023-08-30 07:16:28,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=378, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2023-08-30 07:16:28,546 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-08-30 07:16:28,546 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 378 flow [2023-08-30 07:16:28,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 07:16:28,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:28,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:28,556 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 07:16:28,754 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 07:16:28,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:28,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash -891164034, now seen corresponding path program 1 times [2023-08-30 07:16:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:28,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935205366] [2023-08-30 07:16:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:28,755 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 07:16:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:28,756 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 07:16:28,760 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 07:16:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:16:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:28,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:29,006 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:16:29,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-08-30 07:16:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:29,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:29,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935205366] [2023-08-30 07:16:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935205366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:29,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:29,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 07:16:29,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423557946] [2023-08-30 07:16:29,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:29,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:16:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:16:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:16:29,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:16:29,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 378 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 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 07:16:29,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:29,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:16:29,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:29,779 INFO L130 PetriNetUnfolder]: 1183/2527 cut-off events. [2023-08-30 07:16:29,779 INFO L131 PetriNetUnfolder]: For 5289/5349 co-relation queries the response was YES. [2023-08-30 07:16:29,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 2527 events. 1183/2527 cut-off events. For 5289/5349 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16254 event pairs, 260 based on Foata normal form. 180/2447 useless extension candidates. Maximal degree in co-relation 9312. Up to 1941 conditions per place. [2023-08-30 07:16:29,790 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-30 07:16:29,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 60 transitions, 533 flow [2023-08-30 07:16:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-30 07:16:29,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41408934707903783 [2023-08-30 07:16:29,792 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-30 07:16:29,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-30 07:16:29,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:29,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-30 07:16:29,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 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 07:16:29,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:29,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:29,795 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 378 flow. Second operand 4 states and 482 transitions. [2023-08-30 07:16:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 60 transitions, 533 flow [2023-08-30 07:16:29,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 60 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:29,801 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 403 flow [2023-08-30 07:16:29,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=403, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2023-08-30 07:16:29,802 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-08-30 07:16:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 403 flow [2023-08-30 07:16:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 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 07:16:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:29,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:29,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:30,014 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 07:16:30,015 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:30,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2114291928, now seen corresponding path program 2 times [2023-08-30 07:16:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:30,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071216368] [2023-08-30 07:16:30,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:16:30,016 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 07:16:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:30,017 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 07:16:30,019 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 07:16:30,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:16:30,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:16:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:30,148 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 07:16:30,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:16:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:30,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:30,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071216368] [2023-08-30 07:16:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071216368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:16:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903111390] [2023-08-30 07:16:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:16:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:16:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:16:30,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-30 07:16:30,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:16:30,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:30,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-30 07:16:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:31,187 INFO L130 PetriNetUnfolder]: 1103/2447 cut-off events. [2023-08-30 07:16:31,187 INFO L131 PetriNetUnfolder]: For 6589/6709 co-relation queries the response was YES. [2023-08-30 07:16:31,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9716 conditions, 2447 events. 1103/2447 cut-off events. For 6589/6709 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 16195 event pairs, 340 based on Foata normal form. 120/2267 useless extension candidates. Maximal degree in co-relation 9672. Up to 1961 conditions per place. [2023-08-30 07:16:31,199 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 47 selfloop transitions, 2 changer transitions 7/58 dead transitions. [2023-08-30 07:16:31,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 58 transitions, 531 flow [2023-08-30 07:16:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-30 07:16:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951890034364261 [2023-08-30 07:16:31,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-30 07:16:31,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-30 07:16:31,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:31,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-30 07:16:31,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 07:16:31,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:31,205 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:31,206 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 403 flow. Second operand 4 states and 460 transitions. [2023-08-30 07:16:31,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 58 transitions, 531 flow [2023-08-30 07:16:31,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 58 transitions, 520 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:31,213 INFO L231 Difference]: Finished difference. Result has 91 places, 49 transitions, 376 flow [2023-08-30 07:16:31,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=91, PETRI_TRANSITIONS=49} [2023-08-30 07:16:31,214 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-08-30 07:16:31,214 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 49 transitions, 376 flow [2023-08-30 07:16:31,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:16:31,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:31,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:31,231 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 07:16:31,422 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 07:16:31,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:31,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash -874105724, now seen corresponding path program 2 times [2023-08-30 07:16:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693391653] [2023-08-30 07:16:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:16:31,423 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 07:16:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:31,425 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 07:16:31,427 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 07:16:31,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:16:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:31,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:16:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:31,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:32,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693391653] [2023-08-30 07:16:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693391653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:32,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:32,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 07:16:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803514301] [2023-08-30 07:16:32,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:16:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:16:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:16:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 291 [2023-08-30 07:16:32,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 49 transitions, 376 flow. Second operand has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 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 07:16:32,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:32,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 291 [2023-08-30 07:16:32,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:33,342 INFO L130 PetriNetUnfolder]: 983/1975 cut-off events. [2023-08-30 07:16:33,342 INFO L131 PetriNetUnfolder]: For 6197/6258 co-relation queries the response was YES. [2023-08-30 07:16:33,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7929 conditions, 1975 events. 983/1975 cut-off events. For 6197/6258 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 11276 event pairs, 475 based on Foata normal form. 85/1798 useless extension candidates. Maximal degree in co-relation 7884. Up to 1830 conditions per place. [2023-08-30 07:16:33,353 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 42 selfloop transitions, 4 changer transitions 22/70 dead transitions. [2023-08-30 07:16:33,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 70 transitions, 613 flow [2023-08-30 07:16:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:16:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:16:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1035 transitions. [2023-08-30 07:16:33,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951890034364261 [2023-08-30 07:16:33,359 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1035 transitions. [2023-08-30 07:16:33,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1035 transitions. [2023-08-30 07:16:33,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:33,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1035 transitions. [2023-08-30 07:16:33,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 07:16:33,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:16:33,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:16:33,367 INFO L175 Difference]: Start difference. First operand has 91 places, 49 transitions, 376 flow. Second operand 9 states and 1035 transitions. [2023-08-30 07:16:33,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 70 transitions, 613 flow [2023-08-30 07:16:33,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 70 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 07:16:33,383 INFO L231 Difference]: Finished difference. Result has 95 places, 48 transitions, 391 flow [2023-08-30 07:16:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=95, PETRI_TRANSITIONS=48} [2023-08-30 07:16:33,384 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2023-08-30 07:16:33,384 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 48 transitions, 391 flow [2023-08-30 07:16:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 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 07:16:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:33,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:33,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:33,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash -546131255, now seen corresponding path program 3 times [2023-08-30 07:16:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:33,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991674801] [2023-08-30 07:16:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:16:33,598 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 07:16:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:33,599 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:33,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:16:33,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:16:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:16:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:33,790 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 07:16:33,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:16:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:33,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:33,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991674801] [2023-08-30 07:16:33,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991674801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:33,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:33,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:16:33,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059554502] [2023-08-30 07:16:33,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:16:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:16:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:16:34,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-30 07:16:34,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 48 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:16:34,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:34,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-30 07:16:34,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:34,433 INFO L130 PetriNetUnfolder]: 801/1604 cut-off events. [2023-08-30 07:16:34,434 INFO L131 PetriNetUnfolder]: For 7868/7944 co-relation queries the response was YES. [2023-08-30 07:16:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 1604 events. 801/1604 cut-off events. For 7868/7944 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8451 event pairs, 57 based on Foata normal form. 152/1528 useless extension candidates. Maximal degree in co-relation 7775. Up to 875 conditions per place. [2023-08-30 07:16:34,440 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 49 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-30 07:16:34,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 55 transitions, 529 flow [2023-08-30 07:16:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:16:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:16:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-08-30 07:16:34,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943298969072165 [2023-08-30 07:16:34,443 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-08-30 07:16:34,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-08-30 07:16:34,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:34,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-08-30 07:16:34,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 07:16:34,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:34,445 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 07:16:34,445 INFO L175 Difference]: Start difference. First operand has 95 places, 48 transitions, 391 flow. Second operand 4 states and 459 transitions. [2023-08-30 07:16:34,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 55 transitions, 529 flow [2023-08-30 07:16:34,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 55 transitions, 488 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-08-30 07:16:34,455 INFO L231 Difference]: Finished difference. Result has 87 places, 48 transitions, 371 flow [2023-08-30 07:16:34,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=371, PETRI_PLACES=87, PETRI_TRANSITIONS=48} [2023-08-30 07:16:34,456 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-08-30 07:16:34,456 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 48 transitions, 371 flow [2023-08-30 07:16:34,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 07:16:34,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:34,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:34,467 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 (20)] Ended with exit code 0 [2023-08-30 07:16:34,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:34,667 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:34,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash -399791552, now seen corresponding path program 1 times [2023-08-30 07:16:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148375269] [2023-08-30 07:16:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:34,668 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 07:16:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:34,668 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:16:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:16:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:35,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:35,365 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:16:35,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-08-30 07:16:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:36,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148375269] [2023-08-30 07:16:36,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148375269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:36,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:36,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 07:16:36,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908807341] [2023-08-30 07:16:36,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:16:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:16:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:16:36,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-08-30 07:16:36,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 48 transitions, 371 flow. Second operand has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 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 07:16:36,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:36,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-08-30 07:16:36,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:37,872 INFO L130 PetriNetUnfolder]: 1618/3162 cut-off events. [2023-08-30 07:16:37,872 INFO L131 PetriNetUnfolder]: For 6120/6120 co-relation queries the response was YES. [2023-08-30 07:16:37,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12737 conditions, 3162 events. 1618/3162 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 19131 event pairs, 19 based on Foata normal form. 19/2763 useless extension candidates. Maximal degree in co-relation 12694. Up to 1787 conditions per place. [2023-08-30 07:16:37,884 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 62 selfloop transitions, 24 changer transitions 2/89 dead transitions. [2023-08-30 07:16:37,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 748 flow [2023-08-30 07:16:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:16:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:16:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-30 07:16:37,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38075601374570445 [2023-08-30 07:16:37,887 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-30 07:16:37,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-30 07:16:37,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:37,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-30 07:16:37,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 07:16:37,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:37,891 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:37,891 INFO L175 Difference]: Start difference. First operand has 87 places, 48 transitions, 371 flow. Second operand 10 states and 1108 transitions. [2023-08-30 07:16:37,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 748 flow [2023-08-30 07:16:37,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 89 transitions, 716 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 07:16:37,899 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 545 flow [2023-08-30 07:16:37,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-08-30 07:16:37,899 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2023-08-30 07:16:37,899 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 545 flow [2023-08-30 07:16:37,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 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 07:16:37,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:37,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:37,908 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 (21)] Ended with exit code 0 [2023-08-30 07:16:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:38,105 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:38,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:38,105 INFO L85 PathProgramCache]: Analyzing trace with hash -933247944, now seen corresponding path program 2 times [2023-08-30 07:16:38,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:38,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347938563] [2023-08-30 07:16:38,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:16:38,105 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 07:16:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:38,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:38,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:16:38,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:16:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:16:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:38,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:38,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347938563] [2023-08-30 07:16:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347938563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:38,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:38,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-08-30 07:16:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488384025] [2023-08-30 07:16:38,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:38,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 07:16:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 07:16:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 07:16:38,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-08-30 07:16:38,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 545 flow. Second operand has 9 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 07:16:38,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:38,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-08-30 07:16:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:39,421 INFO L130 PetriNetUnfolder]: 2074/4169 cut-off events. [2023-08-30 07:16:39,421 INFO L131 PetriNetUnfolder]: For 12358/12358 co-relation queries the response was YES. [2023-08-30 07:16:39,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19296 conditions, 4169 events. 2074/4169 cut-off events. For 12358/12358 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 27731 event pairs, 190 based on Foata normal form. 228/4397 useless extension candidates. Maximal degree in co-relation 19249. Up to 2946 conditions per place. [2023-08-30 07:16:39,445 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 69 selfloop transitions, 13 changer transitions 1/85 dead transitions. [2023-08-30 07:16:39,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 834 flow [2023-08-30 07:16:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:16:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:16:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-08-30 07:16:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261168384879725 [2023-08-30 07:16:39,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-08-30 07:16:39,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-08-30 07:16:39,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:39,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-08-30 07:16:39,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 07:16:39,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 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 07:16:39,450 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 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 07:16:39,450 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 545 flow. Second operand 5 states and 620 transitions. [2023-08-30 07:16:39,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 834 flow [2023-08-30 07:16:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 760 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-30 07:16:39,483 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 614 flow [2023-08-30 07:16:39,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2023-08-30 07:16:39,484 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2023-08-30 07:16:39,484 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 614 flow [2023-08-30 07:16:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 07:16:39,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:39,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:39,493 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 (22)] Ended with exit code 0 [2023-08-30 07:16:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:39,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:39,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash -431433522, now seen corresponding path program 3 times [2023-08-30 07:16:39,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:39,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406436991] [2023-08-30 07:16:39,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:16:39,693 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 07:16:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:39,694 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:39,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:16:39,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:16:39,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:16:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:40,258 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:16:40,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-08-30 07:16:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:41,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406436991] [2023-08-30 07:16:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406436991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:41,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:41,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 07:16:41,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355317269] [2023-08-30 07:16:41,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:41,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:16:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:16:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:16:41,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-08-30 07:16:41,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 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 07:16:41,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:41,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-08-30 07:16:41,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:43,642 INFO L130 PetriNetUnfolder]: 2435/4853 cut-off events. [2023-08-30 07:16:43,642 INFO L131 PetriNetUnfolder]: For 15962/15962 co-relation queries the response was YES. [2023-08-30 07:16:43,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 4853 events. 2435/4853 cut-off events. For 15962/15962 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 32826 event pairs, 190 based on Foata normal form. 19/4872 useless extension candidates. Maximal degree in co-relation 22705. Up to 2338 conditions per place. [2023-08-30 07:16:43,679 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 70 selfloop transitions, 32 changer transitions 10/113 dead transitions. [2023-08-30 07:16:43,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 1049 flow [2023-08-30 07:16:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:16:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:16:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1329 transitions. [2023-08-30 07:16:43,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805841924398625 [2023-08-30 07:16:43,682 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1329 transitions. [2023-08-30 07:16:43,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1329 transitions. [2023-08-30 07:16:43,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:43,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1329 transitions. [2023-08-30 07:16:43,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 0 states have call successors, (0), 0 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 07:16:43,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:16:43,688 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:16:43,688 INFO L175 Difference]: Start difference. First operand has 99 places, 71 transitions, 614 flow. Second operand 12 states and 1329 transitions. [2023-08-30 07:16:43,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 1049 flow [2023-08-30 07:16:43,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 1013 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:43,779 INFO L231 Difference]: Finished difference. Result has 114 places, 78 transitions, 762 flow [2023-08-30 07:16:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=762, PETRI_PLACES=114, PETRI_TRANSITIONS=78} [2023-08-30 07:16:43,779 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 76 predicate places. [2023-08-30 07:16:43,779 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 78 transitions, 762 flow [2023-08-30 07:16:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 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 07:16:43,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:43,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:43,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:43,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:43,990 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:43,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2022753302, now seen corresponding path program 4 times [2023-08-30 07:16:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425279290] [2023-08-30 07:16:43,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:16:43,992 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 07:16:43,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:43,993 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:43,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:16:44,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:16:44,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:44,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 07:16:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:44,200 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 07:16:44,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:16:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:44,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:45,026 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:16:45,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 07:16:45,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:16:45,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-08-30 07:16:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:16:45,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425279290] [2023-08-30 07:16:45,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425279290] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:45,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:45,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 07:16:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880860544] [2023-08-30 07:16:45,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:45,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:16:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:16:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=196, Unknown=2, NotChecked=0, Total=240 [2023-08-30 07:16:47,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 291 [2023-08-30 07:16:47,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 78 transitions, 762 flow. Second operand has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 07:16:47,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:47,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 291 [2023-08-30 07:16:47,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:49,056 INFO L130 PetriNetUnfolder]: 2739/5271 cut-off events. [2023-08-30 07:16:49,057 INFO L131 PetriNetUnfolder]: For 19825/19825 co-relation queries the response was YES. [2023-08-30 07:16:49,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28234 conditions, 5271 events. 2739/5271 cut-off events. For 19825/19825 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 35231 event pairs, 0 based on Foata normal form. 19/5290 useless extension candidates. Maximal degree in co-relation 28179. Up to 2452 conditions per place. [2023-08-30 07:16:49,085 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 72 selfloop transitions, 38 changer transitions 2/113 dead transitions. [2023-08-30 07:16:49,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 1191 flow [2023-08-30 07:16:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:16:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:16:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 908 transitions. [2023-08-30 07:16:49,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120274914089347 [2023-08-30 07:16:49,087 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 908 transitions. [2023-08-30 07:16:49,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 908 transitions. [2023-08-30 07:16:49,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:49,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 908 transitions. [2023-08-30 07:16:49,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.8) internal successors, (908), 10 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 07:16:49,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,109 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,109 INFO L175 Difference]: Start difference. First operand has 114 places, 78 transitions, 762 flow. Second operand 10 states and 908 transitions. [2023-08-30 07:16:49,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 1191 flow [2023-08-30 07:16:49,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 113 transitions, 1147 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-30 07:16:49,315 INFO L231 Difference]: Finished difference. Result has 118 places, 87 transitions, 955 flow [2023-08-30 07:16:49,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=955, PETRI_PLACES=118, PETRI_TRANSITIONS=87} [2023-08-30 07:16:49,315 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-30 07:16:49,316 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 87 transitions, 955 flow [2023-08-30 07:16:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 07:16:49,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:49,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:49,326 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 (24)] Ended with exit code 0 [2023-08-30 07:16:49,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:49,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:16:49,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1139877070, now seen corresponding path program 5 times [2023-08-30 07:16:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:49,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801026945] [2023-08-30 07:16:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:16:49,528 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 07:16:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:49,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:49,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:16:49,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:16:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:16:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 07:16:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:49,840 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 07:16:50,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-08-30 07:16:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:50,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:16:50,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 07:17:10,635 WARN L222 SmtUtils]: Spent 19.81s on a formula simplification. DAG size of input: 112 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:17:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:10,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:11,270 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:17:11,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 07:17:11,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:17:11,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 15 [2023-08-30 07:17:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:15,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801026945] [2023-08-30 07:17:15,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801026945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:15,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-08-30 07:17:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527306921] [2023-08-30 07:17:15,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:15,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:17:15,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:17:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2023-08-30 07:17:18,062 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 07:17:20,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:22,697 WARN L539 Checker$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 07:17:25,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:27,268 WARN L539 Checker$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 07:17:29,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:31,447 WARN L539 Checker$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 07:17:33,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:36,367 WARN L539 Checker$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 07:17:38,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:41,495 WARN L539 Checker$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 07:17:43,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:44,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:47,841 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 07:17:47,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 291 [2023-08-30 07:17:47,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 87 transitions, 955 flow. Second operand has 20 states, 20 states have (on average 76.7) internal successors, (1534), 20 states have internal predecessors, (1534), 0 states have call successors, (0), 0 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 07:17:47,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:47,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 291 [2023-08-30 07:17:47,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:17,527 WARN L222 SmtUtils]: Spent 17.73s on a formula simplification. DAG size of input: 130 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:18:35,343 WARN L222 SmtUtils]: Spent 17.61s on a formula simplification. DAG size of input: 96 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:18:52,170 WARN L222 SmtUtils]: Spent 16.23s on a formula simplification. DAG size of input: 102 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:19:06,232 WARN L222 SmtUtils]: Spent 13.33s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:19:09,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:19:11,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:19:13,796 WARN L539 Checker$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 07:19:20,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:19:29,037 WARN L539 Checker$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 07:19:34,916 INFO L130 PetriNetUnfolder]: 2949/5858 cut-off events. [2023-08-30 07:19:34,916 INFO L131 PetriNetUnfolder]: For 31302/31302 co-relation queries the response was YES. [2023-08-30 07:19:34,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35355 conditions, 5858 events. 2949/5858 cut-off events. For 31302/31302 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 40329 event pairs, 337 based on Foata normal form. 8/5866 useless extension candidates. Maximal degree in co-relation 35297. Up to 2530 conditions per place. [2023-08-30 07:19:34,953 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 160 selfloop transitions, 87 changer transitions 17/265 dead transitions. [2023-08-30 07:19:34,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 265 transitions, 2967 flow [2023-08-30 07:19:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 07:19:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 07:19:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2426 transitions. [2023-08-30 07:19:34,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27789232531500574 [2023-08-30 07:19:34,958 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2426 transitions. [2023-08-30 07:19:34,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2426 transitions. [2023-08-30 07:19:34,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:34,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2426 transitions. [2023-08-30 07:19:34,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 80.86666666666666) internal successors, (2426), 30 states have internal predecessors, (2426), 0 states have call successors, (0), 0 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 07:19:34,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 291.0) internal successors, (9021), 31 states have internal predecessors, (9021), 0 states have call successors, (0), 0 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 07:19:34,966 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 291.0) internal successors, (9021), 31 states have internal predecessors, (9021), 0 states have call successors, (0), 0 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 07:19:34,966 INFO L175 Difference]: Start difference. First operand has 118 places, 87 transitions, 955 flow. Second operand 30 states and 2426 transitions. [2023-08-30 07:19:34,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 265 transitions, 2967 flow [2023-08-30 07:19:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 265 transitions, 2886 flow, removed 32 selfloop flow, removed 3 redundant places. [2023-08-30 07:19:35,368 INFO L231 Difference]: Finished difference. Result has 158 places, 145 transitions, 1937 flow [2023-08-30 07:19:35,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1937, PETRI_PLACES=158, PETRI_TRANSITIONS=145} [2023-08-30 07:19:35,368 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2023-08-30 07:19:35,368 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 145 transitions, 1937 flow [2023-08-30 07:19:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 76.7) internal successors, (1534), 20 states have internal predecessors, (1534), 0 states have call successors, (0), 0 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 07:19:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:19:35,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:35,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:35,583 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:19:35,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 491331559, now seen corresponding path program 6 times [2023-08-30 07:19:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:35,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346800976] [2023-08-30 07:19:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:19:35,584 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 07:19:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:35,586 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:19:35,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 07:19:35,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:19:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:19:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:19:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:19:35,888 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:19:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-08-30 07:19:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:19:35,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:19:35,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346800976] [2023-08-30 07:19:35,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346800976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:19:35,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:19:35,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-08-30 07:19:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228355343] [2023-08-30 07:19:35,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:19:35,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:19:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:19:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:19:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:19:36,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:19:36,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 145 transitions, 1937 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 07:19:36,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:36,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:19:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:38,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:40,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:41,742 INFO L130 PetriNetUnfolder]: 2946/6143 cut-off events. [2023-08-30 07:19:41,742 INFO L131 PetriNetUnfolder]: For 51759/51800 co-relation queries the response was YES. [2023-08-30 07:19:41,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40286 conditions, 6143 events. 2946/6143 cut-off events. For 51759/51800 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 45569 event pairs, 324 based on Foata normal form. 243/6367 useless extension candidates. Maximal degree in co-relation 40213. Up to 3856 conditions per place. [2023-08-30 07:19:41,794 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 114 selfloop transitions, 41 changer transitions 7/165 dead transitions. [2023-08-30 07:19:41,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 165 transitions, 2351 flow [2023-08-30 07:19:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:19:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:19:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2023-08-30 07:19:41,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41695303550973656 [2023-08-30 07:19:41,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 728 transitions. [2023-08-30 07:19:41,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 728 transitions. [2023-08-30 07:19:41,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:41,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 728 transitions. [2023-08-30 07:19:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 07:19:41,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:19:41,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:19:41,817 INFO L175 Difference]: Start difference. First operand has 158 places, 145 transitions, 1937 flow. Second operand 6 states and 728 transitions. [2023-08-30 07:19:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 165 transitions, 2351 flow [2023-08-30 07:19:42,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 2176 flow, removed 45 selfloop flow, removed 6 redundant places. [2023-08-30 07:19:42,305 INFO L231 Difference]: Finished difference. Result has 158 places, 138 transitions, 1787 flow [2023-08-30 07:19:42,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1787, PETRI_PLACES=158, PETRI_TRANSITIONS=138} [2023-08-30 07:19:42,305 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2023-08-30 07:19:42,306 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 138 transitions, 1787 flow [2023-08-30 07:19:42,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 07:19:42,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:42,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:19:42,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:42,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:42,514 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:19:42,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -347469648, now seen corresponding path program 7 times [2023-08-30 07:19:42,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:42,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618319064] [2023-08-30 07:19:42,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:19:42,516 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 07:19:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:42,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 07:19:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:19:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:19:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:42,730 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 07:19:42,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 07:19:42,791 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 13 treesize of output 9 [2023-08-30 07:19:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:19:42,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:19:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:19:43,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:19:43,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618319064] [2023-08-30 07:19:43,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618319064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:19:43,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:19:43,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 07:19:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458380460] [2023-08-30 07:19:43,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:19:43,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:19:43,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:19:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:19:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:19:44,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-08-30 07:19:44,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 138 transitions, 1787 flow. Second operand has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 07:19:44,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:44,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-08-30 07:19:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:45,706 INFO L130 PetriNetUnfolder]: 2560/5369 cut-off events. [2023-08-30 07:19:45,706 INFO L131 PetriNetUnfolder]: For 49202/49205 co-relation queries the response was YES. [2023-08-30 07:19:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35491 conditions, 5369 events. 2560/5369 cut-off events. For 49202/49205 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 38577 event pairs, 1083 based on Foata normal form. 51/5420 useless extension candidates. Maximal degree in co-relation 35417. Up to 5115 conditions per place. [2023-08-30 07:19:45,753 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 93 selfloop transitions, 8 changer transitions 22/126 dead transitions. [2023-08-30 07:19:45,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 126 transitions, 1743 flow [2023-08-30 07:19:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:19:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:19:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1005 transitions. [2023-08-30 07:19:45,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837342497136312 [2023-08-30 07:19:45,756 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1005 transitions. [2023-08-30 07:19:45,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1005 transitions. [2023-08-30 07:19:45,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:45,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1005 transitions. [2023-08-30 07:19:45,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.66666666666667) internal successors, (1005), 9 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 07:19:45,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:19:45,759 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 07:19:45,759 INFO L175 Difference]: Start difference. First operand has 158 places, 138 transitions, 1787 flow. Second operand 9 states and 1005 transitions. [2023-08-30 07:19:45,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 126 transitions, 1743 flow [2023-08-30 07:19:46,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 126 transitions, 1639 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-30 07:19:46,047 INFO L231 Difference]: Finished difference. Result has 149 places, 93 transitions, 1074 flow [2023-08-30 07:19:46,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1074, PETRI_PLACES=149, PETRI_TRANSITIONS=93} [2023-08-30 07:19:46,047 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 111 predicate places. [2023-08-30 07:19:46,048 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 93 transitions, 1074 flow [2023-08-30 07:19:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 07:19:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:19:46,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:46,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:46,257 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:19:46,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:46,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1999030185, now seen corresponding path program 8 times [2023-08-30 07:19:46,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613667895] [2023-08-30 07:19:46,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:19:46,258 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 07:19:46,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:46,259 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:46,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 07:19:46,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:19:46,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:19:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:19:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:46,463 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 07:19:46,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 07:19:46,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:19:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:19:46,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:19:47,670 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:19:47,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 425 [2023-08-30 07:19:47,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,693 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,696 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,709 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:19:47,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:19:47,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 116 [2023-08-30 07:19:47,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:19:47,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 36 [2023-08-30 07:19:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:19:57,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:19:57,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613667895] [2023-08-30 07:19:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613667895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:19:57,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:19:57,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 07:19:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745142491] [2023-08-30 07:19:57,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:19:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 07:19:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:19:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 07:19:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2023-08-30 07:19:59,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 291 [2023-08-30 07:19:59,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 93 transitions, 1074 flow. Second operand has 16 states, 16 states have (on average 80.0) internal successors, (1280), 16 states have internal predecessors, (1280), 0 states have call successors, (0), 0 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 07:19:59,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:59,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 291 [2023-08-30 07:19:59,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:02,893 INFO L130 PetriNetUnfolder]: 2881/6061 cut-off events. [2023-08-30 07:20:02,893 INFO L131 PetriNetUnfolder]: For 36702/36702 co-relation queries the response was YES. [2023-08-30 07:20:02,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36956 conditions, 6061 events. 2881/6061 cut-off events. For 36702/36702 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 44626 event pairs, 38 based on Foata normal form. 19/6080 useless extension candidates. Maximal degree in co-relation 36886. Up to 3039 conditions per place. [2023-08-30 07:20:02,961 INFO L137 encePairwiseOnDemand]: 281/291 looper letters, 73 selfloop transitions, 51 changer transitions 8/133 dead transitions. [2023-08-30 07:20:02,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 133 transitions, 1585 flow [2023-08-30 07:20:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:20:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:20:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1003 transitions. [2023-08-30 07:20:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2872279495990836 [2023-08-30 07:20:02,965 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1003 transitions. [2023-08-30 07:20:02,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1003 transitions. [2023-08-30 07:20:02,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:20:02,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1003 transitions. [2023-08-30 07:20:02,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 83.58333333333333) internal successors, (1003), 12 states have internal predecessors, (1003), 0 states have call successors, (0), 0 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 07:20:02,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:20:02,971 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 07:20:02,971 INFO L175 Difference]: Start difference. First operand has 149 places, 93 transitions, 1074 flow. Second operand 12 states and 1003 transitions. [2023-08-30 07:20:02,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 133 transitions, 1585 flow [2023-08-30 07:20:03,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 133 transitions, 1546 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-30 07:20:03,522 INFO L231 Difference]: Finished difference. Result has 149 places, 103 transitions, 1319 flow [2023-08-30 07:20:03,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1319, PETRI_PLACES=149, PETRI_TRANSITIONS=103} [2023-08-30 07:20:03,522 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 111 predicate places. [2023-08-30 07:20:03,522 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 103 transitions, 1319 flow [2023-08-30 07:20:03,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.0) internal successors, (1280), 16 states have internal predecessors, (1280), 0 states have call successors, (0), 0 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 07:20:03,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:20:03,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:20:03,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 07:20:03,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:20:03,735 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:20:03,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:20:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash -207624765, now seen corresponding path program 9 times [2023-08-30 07:20:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:20:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702864063] [2023-08-30 07:20:03,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:20:03,736 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 07:20:03,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:20:03,737 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:20:03,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 07:20:03,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:20:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:20:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:20:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:20:03,911 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 26 treesize of output 24 [2023-08-30 07:20:03,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 [2023-08-30 07:20:04,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-08-30 07:20:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:20:04,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:04,222 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_746) c_~q~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv7 32) c_~q~0.offset .cse1)) (select .cse0 (bvadd (_ bv6 32) c_~q~0.offset .cse1))) (select .cse0 (bvadd c_~q~0.offset (_ bv5 32) .cse1))) (select .cse0 (bvadd (_ bv4 32) c_~q~0.offset .cse1)))) (_ bv0 32))) is different from false [2023-08-30 07:20:06,511 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q~0.offset (_ BitVec 32)) (v_ArrVal_746 (Array (_ BitVec 32) (_ BitVec 8)))) (or (= (_ bv0 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_746) c_~q~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv7 32) .cse1 ~q~0.offset)) (select .cse0 (bvadd (_ bv6 32) .cse1 ~q~0.offset))) (select .cse0 (bvadd (_ bv5 32) .cse1 ~q~0.offset))) (select .cse0 (bvadd (_ bv4 32) .cse1 ~q~0.offset))))) (not (= (let ((.cse2 (select |c_#memory_int| c_~q~0.base)) (.cse3 (bvmul c_~q_back~0 (_ bv4 32)))) (concat (concat (concat (select .cse2 (bvadd .cse3 (_ bv7 32) ~q~0.offset)) (select .cse2 (bvadd .cse3 (_ bv6 32) ~q~0.offset))) (select .cse2 (bvadd .cse3 (_ bv5 32) ~q~0.offset))) (select .cse2 (bvadd .cse3 (_ bv4 32) ~q~0.offset)))) (_ bv0 32))))) is different from false [2023-08-30 07:20:06,758 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:20:06,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2023-08-30 07:20:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2023-08-30 07:20:06,865 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:20:06,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2023-08-30 07:20:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 07:20:07,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:20:07,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702864063] [2023-08-30 07:20:07,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702864063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:07,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:20:07,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-08-30 07:20:07,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490256843] [2023-08-30 07:20:07,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:07,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:20:07,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:20:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:20:07,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=72, Unknown=3, NotChecked=34, Total=132 [2023-08-30 07:20:07,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 291 [2023-08-30 07:20:07,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 103 transitions, 1319 flow. Second operand has 12 states, 12 states have (on average 97.91666666666667) internal successors, (1175), 12 states have internal predecessors, (1175), 0 states have call successors, (0), 0 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 07:20:07,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:07,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 291 [2023-08-30 07:20:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:12,328 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 07:20:14,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:20:16,462 WARN L539 Checker$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 07:20:18,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:20:20,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:22,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:20:24,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:26,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:20:28,959 WARN L539 Checker$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 07:20:31,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:20:33,107 WARN L539 Checker$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 07:20:33,766 INFO L130 PetriNetUnfolder]: 2520/5373 cut-off events. [2023-08-30 07:20:33,766 INFO L131 PetriNetUnfolder]: For 48184/48226 co-relation queries the response was YES. [2023-08-30 07:20:33,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35997 conditions, 5373 events. 2520/5373 cut-off events. For 48184/48226 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 39179 event pairs, 133 based on Foata normal form. 82/5435 useless extension candidates. Maximal degree in co-relation 35928. Up to 3106 conditions per place. [2023-08-30 07:20:33,817 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 83 selfloop transitions, 27 changer transitions 10/122 dead transitions. [2023-08-30 07:20:33,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 122 transitions, 1573 flow [2023-08-30 07:20:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:20:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:20:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 825 transitions. [2023-08-30 07:20:33,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543814432989691 [2023-08-30 07:20:33,821 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 825 transitions. [2023-08-30 07:20:33,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 825 transitions. [2023-08-30 07:20:33,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:20:33,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 825 transitions. [2023-08-30 07:20:33,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.125) internal successors, (825), 8 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 07:20:33,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 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 07:20:33,823 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 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 07:20:33,823 INFO L175 Difference]: Start difference. First operand has 149 places, 103 transitions, 1319 flow. Second operand 8 states and 825 transitions. [2023-08-30 07:20:33,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 122 transitions, 1573 flow [2023-08-30 07:20:34,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 122 transitions, 1480 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-08-30 07:20:34,231 INFO L231 Difference]: Finished difference. Result has 143 places, 89 transitions, 1107 flow [2023-08-30 07:20:34,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1107, PETRI_PLACES=143, PETRI_TRANSITIONS=89} [2023-08-30 07:20:34,232 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-08-30 07:20:34,232 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 89 transitions, 1107 flow [2023-08-30 07:20:34,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 97.91666666666667) internal successors, (1175), 12 states have internal predecessors, (1175), 0 states have call successors, (0), 0 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 07:20:34,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:20:34,233 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:20:34,244 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 (29)] Ended with exit code 0 [2023-08-30 07:20:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:20:34,437 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:20:34,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:20:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2118839058, now seen corresponding path program 10 times [2023-08-30 07:20:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:20:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028771602] [2023-08-30 07:20:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:20:34,438 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 07:20:34,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:20:34,439 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:20:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 07:20:34,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:20:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:20:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:20:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:20:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:20:34,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:34,928 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-08-30 07:20:34,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 30 [2023-08-30 07:20:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:20:35,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:20:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028771602] [2023-08-30 07:20:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028771602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:35,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:20:35,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:20:35,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582496592] [2023-08-30 07:20:35,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:35,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:20:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:20:35,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:20:35,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:20:35,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:20:35,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 89 transitions, 1107 flow. Second operand has 10 states, 10 states have (on average 115.8) internal successors, (1158), 10 states have internal predecessors, (1158), 0 states have call successors, (0), 0 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 07:20:35,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:35,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:20:35,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:37,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:39,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:42,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:44,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:45,213 INFO L130 PetriNetUnfolder]: 3061/6087 cut-off events. [2023-08-30 07:20:45,213 INFO L131 PetriNetUnfolder]: For 55833/55833 co-relation queries the response was YES. [2023-08-30 07:20:45,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41599 conditions, 6087 events. 3061/6087 cut-off events. For 55833/55833 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 42896 event pairs, 418 based on Foata normal form. 190/6277 useless extension candidates. Maximal degree in co-relation 41534. Up to 2604 conditions per place. [2023-08-30 07:20:45,259 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 83 selfloop transitions, 38 changer transitions 0/123 dead transitions. [2023-08-30 07:20:45,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 123 transitions, 1622 flow [2023-08-30 07:20:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:20:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:20:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 731 transitions. [2023-08-30 07:20:45,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186712485681558 [2023-08-30 07:20:45,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 731 transitions. [2023-08-30 07:20:45,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 731 transitions. [2023-08-30 07:20:45,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:20:45,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 731 transitions. [2023-08-30 07:20:45,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.83333333333333) internal successors, (731), 6 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 07:20:45,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:20:45,265 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:20:45,265 INFO L175 Difference]: Start difference. First operand has 143 places, 89 transitions, 1107 flow. Second operand 6 states and 731 transitions. [2023-08-30 07:20:45,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 123 transitions, 1622 flow [2023-08-30 07:20:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 123 transitions, 1478 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-08-30 07:20:45,561 INFO L231 Difference]: Finished difference. Result has 127 places, 97 transitions, 1239 flow [2023-08-30 07:20:45,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1239, PETRI_PLACES=127, PETRI_TRANSITIONS=97} [2023-08-30 07:20:45,562 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2023-08-30 07:20:45,562 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 97 transitions, 1239 flow [2023-08-30 07:20:45,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 115.8) internal successors, (1158), 10 states have internal predecessors, (1158), 0 states have call successors, (0), 0 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 07:20:45,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:20:45,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:20:45,570 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 (30)] Ended with exit code 0 [2023-08-30 07:20:45,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:20:45,767 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:20:45,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:20:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash 245203050, now seen corresponding path program 11 times [2023-08-30 07:20:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:20:45,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557911714] [2023-08-30 07:20:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:20:45,768 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 07:20:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:20:45,769 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:20:45,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 07:20:45,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:20:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:20:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:20:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:20:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:20:45,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:46,112 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-08-30 07:20:46,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-08-30 07:20:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 07:20:46,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:20:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557911714] [2023-08-30 07:20:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557911714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:46,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:20:46,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:20:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012197438] [2023-08-30 07:20:46,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:46,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:20:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:20:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:20:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:20:46,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-30 07:20:46,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 97 transitions, 1239 flow. Second operand has 8 states, 8 states have (on average 116.625) internal successors, (933), 8 states have internal predecessors, (933), 0 states have call successors, (0), 0 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 07:20:46,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:46,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-30 07:20:46,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:47,422 INFO L130 PetriNetUnfolder]: 2643/5213 cut-off events. [2023-08-30 07:20:47,422 INFO L131 PetriNetUnfolder]: For 49316/49316 co-relation queries the response was YES. [2023-08-30 07:20:47,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 5213 events. 2643/5213 cut-off events. For 49316/49316 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 35351 event pairs, 380 based on Foata normal form. 304/5517 useless extension candidates. Maximal degree in co-relation 35245. Up to 3174 conditions per place. [2023-08-30 07:20:47,459 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 78 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2023-08-30 07:20:47,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 110 transitions, 1436 flow [2023-08-30 07:20:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:20:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:20:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 725 transitions. [2023-08-30 07:20:47,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152348224513173 [2023-08-30 07:20:47,465 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 725 transitions. [2023-08-30 07:20:47,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 725 transitions. [2023-08-30 07:20:47,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:20:47,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 725 transitions. [2023-08-30 07:20:47,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.83333333333333) internal successors, (725), 6 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 07:20:47,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:20:47,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 07:20:47,467 INFO L175 Difference]: Start difference. First operand has 127 places, 97 transitions, 1239 flow. Second operand 6 states and 725 transitions. [2023-08-30 07:20:47,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 110 transitions, 1436 flow [2023-08-30 07:20:47,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 110 transitions, 1375 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-30 07:20:47,745 INFO L231 Difference]: Finished difference. Result has 130 places, 91 transitions, 1139 flow [2023-08-30 07:20:47,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1139, PETRI_PLACES=130, PETRI_TRANSITIONS=91} [2023-08-30 07:20:47,745 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-30 07:20:47,746 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 91 transitions, 1139 flow [2023-08-30 07:20:47,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.625) internal successors, (933), 8 states have internal predecessors, (933), 0 states have call successors, (0), 0 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 07:20:47,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:20:47,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:20:47,754 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 07:20:47,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:20:47,949 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:20:47,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:20:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1374710616, now seen corresponding path program 12 times [2023-08-30 07:20:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:20:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035728543] [2023-08-30 07:20:47,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:20:47,949 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 07:20:47,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:20:47,951 INFO L229 MonitoredProcess]: Starting monitored process 32 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 07:20:47,952 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 (32)] Waiting until timeout for monitored process [2023-08-30 07:20:48,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 07:20:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:20:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 07:20:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:20:48,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:20:48,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:20:48,258 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 07:20:48,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2023-08-30 07:20:48,268 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 07:20:48,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2023-08-30 07:20:48,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-08-30 07:20:49,033 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 07:20:49,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:49,632 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2023-08-30 07:20:49,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 125 [2023-08-30 07:20:49,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:20:49,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 30 [2023-08-30 07:20:51,039 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 07:20:51,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:20:51,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035728543] [2023-08-30 07:20:51,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035728543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:51,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:20:51,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-08-30 07:20:51,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313336421] [2023-08-30 07:20:51,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:51,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:20:51,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:20:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:20:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-30 07:20:53,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 291 [2023-08-30 07:20:53,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 91 transitions, 1139 flow. Second operand has 22 states, 22 states have (on average 81.5) internal successors, (1793), 22 states have internal predecessors, (1793), 0 states have call successors, (0), 0 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 07:20:53,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:53,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 291 [2023-08-30 07:20:53,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:21:07,152 WARN L222 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 94 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:21:10,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:21:23,281 WARN L539 Checker$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 07:21:23,991 INFO L130 PetriNetUnfolder]: 3002/5858 cut-off events. [2023-08-30 07:21:23,992 INFO L131 PetriNetUnfolder]: For 52275/52275 co-relation queries the response was YES. [2023-08-30 07:21:24,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39343 conditions, 5858 events. 3002/5858 cut-off events. For 52275/52275 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 40216 event pairs, 819 based on Foata normal form. 126/5984 useless extension candidates. Maximal degree in co-relation 39280. Up to 4421 conditions per place. [2023-08-30 07:21:24,045 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 180 selfloop transitions, 171 changer transitions 1/354 dead transitions. [2023-08-30 07:21:24,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 354 transitions, 4871 flow [2023-08-30 07:21:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 07:21:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 07:21:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2927 transitions. [2023-08-30 07:21:24,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2958358601172428 [2023-08-30 07:21:24,051 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2927 transitions. [2023-08-30 07:21:24,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2927 transitions. [2023-08-30 07:21:24,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:21:24,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2927 transitions. [2023-08-30 07:21:24,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 86.08823529411765) internal successors, (2927), 34 states have internal predecessors, (2927), 0 states have call successors, (0), 0 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 07:21:24,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 291.0) internal successors, (10185), 35 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 07:21:24,059 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 291.0) internal successors, (10185), 35 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 07:21:24,060 INFO L175 Difference]: Start difference. First operand has 130 places, 91 transitions, 1139 flow. Second operand 34 states and 2927 transitions. [2023-08-30 07:21:24,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 354 transitions, 4871 flow [2023-08-30 07:21:24,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 354 transitions, 4799 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:21:24,382 INFO L231 Difference]: Finished difference. Result has 166 places, 263 transitions, 4331 flow [2023-08-30 07:21:24,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4331, PETRI_PLACES=166, PETRI_TRANSITIONS=263} [2023-08-30 07:21:24,382 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2023-08-30 07:21:24,382 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 263 transitions, 4331 flow [2023-08-30 07:21:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.5) internal successors, (1793), 22 states have internal predecessors, (1793), 0 states have call successors, (0), 0 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 07:21:24,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:21:24,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:21:24,394 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 07:21:24,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 07:21:24,592 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 07:21:24,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:21:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 835049529, now seen corresponding path program 13 times [2023-08-30 07:21:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:21:24,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689278627] [2023-08-30 07:21:24,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 07:21:24,595 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 07:21:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:21:24,596 INFO L229 MonitoredProcess]: Starting monitored process 33 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 07:21:24,598 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 (33)] Waiting until timeout for monitored process [2023-08-30 07:21:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:21:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 07:21:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:21:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 07:21:25,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:21:28,618 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2023-08-30 07:21:28,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 181 treesize of output 247 Killed by 15