./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:48:31,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:48:31,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:48:31,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:48:31,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:48:31,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:48:31,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:48:31,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:48:31,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:48:31,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:48:31,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:48:31,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:48:31,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:48:31,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:48:31,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:48:31,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:48:31,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:48:31,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:48:31,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:48:31,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:48:31,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:48:31,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:48:31,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:48:31,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:48:31,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:48:31,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:48:31,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:48:31,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:48:31,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:48:31,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:48:31,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:48:31,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:48:31,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:48:31,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:48:31,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:48:31,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:48:31,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:48:31,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:48:31,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:48:31,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:48:31,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:48:31,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:48:31,651 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:48:31,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:48:31,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:48:31,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:48:31,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:48:31,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:48:31,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:48:31,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:48:31,654 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:48:31,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:48:31,655 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:48:31,656 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:48:31,657 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:48:31,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:48:31,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:48:31,657 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:48:31,657 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:48:31,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:48:31,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:48:31,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:48:31,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:31,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:48:31,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:48:31,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:48:31,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:48:31,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:48:31,659 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:48:31,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:48:31,660 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:48:31,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:48:31,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:48:32,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:48:32,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:48:32,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:48:32,013 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:48:32,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 02:48:33,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:48:33,468 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:48:33,468 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 02:48:33,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af25917f8/2a5a282cab1843a1b4dd21e61c8fbfe0/FLAG5abc423a7 [2023-09-01 02:48:33,506 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af25917f8/2a5a282cab1843a1b4dd21e61c8fbfe0 [2023-09-01 02:48:33,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:48:33,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:48:33,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:33,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:48:33,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:48:33,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:33" (1/1) ... [2023-09-01 02:48:33,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@920f47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:33, skipping insertion in model container [2023-09-01 02:48:33,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:33" (1/1) ... [2023-09-01 02:48:33,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:48:33,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:33,734 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 02:48:33,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:33,763 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:48:33,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31fb8318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:33, skipping insertion in model container [2023-09-01 02:48:33,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:33,766 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:48:33,768 INFO L158 Benchmark]: Toolchain (without parser) took 256.40ms. Allocated memory is still 69.2MB. Free memory was 45.6MB in the beginning and 35.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:48:33,768 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 69.2MB. Free memory is still 46.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:48:33,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.08ms. Allocated memory is still 69.2MB. Free memory was 45.4MB in the beginning and 36.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:48:33,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 69.2MB. Free memory is still 46.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.08ms. Allocated memory is still 69.2MB. Free memory was 45.4MB in the beginning and 36.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:48:35,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:48:35,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:48:35,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:48:35,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:48:35,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:48:35,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:48:35,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:48:35,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:48:35,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:48:35,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:48:35,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:48:35,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:48:35,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:48:35,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:48:35,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:48:35,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:48:35,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:48:35,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:48:35,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:48:35,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:48:35,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:48:35,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:48:35,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:48:35,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:48:35,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:48:35,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:48:35,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:48:35,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:48:35,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:48:35,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:48:35,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:48:35,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:48:35,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:48:35,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:48:35,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:48:35,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:48:35,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:48:35,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:48:35,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:48:35,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:48:35,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:48:35,678 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:48:35,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:48:35,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:48:35,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:48:35,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:48:35,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:48:35,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:48:35,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:48:35,682 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:48:35,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:48:35,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:48:35,683 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:48:35,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:48:35,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:48:35,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:48:35,684 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:48:35,684 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:48:35,684 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:48:35,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:48:35,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:48:35,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:48:35,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:48:35,685 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:48:35,685 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:48:35,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:48:35,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:48:35,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:48:35,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:35,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:48:35,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:48:35,687 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:48:35,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:48:35,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:48:35,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:48:35,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:48:35,688 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:48:35,688 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:48:35,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:48:36,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:48:36,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:48:36,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:48:36,048 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:48:36,048 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:48:36,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 02:48:37,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:48:37,626 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:48:37,627 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 02:48:37,634 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b57aac2/a33350d29fcf4414a3386c99de020375/FLAG93b8225a5 [2023-09-01 02:48:37,645 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b57aac2/a33350d29fcf4414a3386c99de020375 [2023-09-01 02:48:37,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:48:37,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:48:37,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:37,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:48:37,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:48:37,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:37" (1/1) ... [2023-09-01 02:48:37,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:37, skipping insertion in model container [2023-09-01 02:48:37,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:37" (1/1) ... [2023-09-01 02:48:37,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:48:37,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:37,836 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 02:48:37,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:37,882 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:48:37,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:37,915 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 02:48:37,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:37,945 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:48:37,982 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-09-01 02:48:37,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:38,008 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:48:38,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38 WrapperNode [2023-09-01 02:48:38,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:38,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:38,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:48:38,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:48:38,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,086 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 266 [2023-09-01 02:48:38,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:38,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:48:38,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:48:38,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:48:38,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:48:38,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:48:38,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:48:38,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:48:38,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (1/1) ... [2023-09-01 02:48:38,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:38,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:48:38,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:48:38,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:48:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:48:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:48:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:48:38,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:48:38,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:48:38,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:48:38,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:48:38,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:48:38,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:48:38,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:48:38,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:48:38,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:48:38,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:48:38,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:48:38,256 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:48:38,396 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:48:38,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:48:39,024 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:48:39,032 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:48:39,032 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:48:39,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:39 BoogieIcfgContainer [2023-09-01 02:48:39,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:48:39,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:48:39,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:48:39,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:48:39,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:48:37" (1/3) ... [2023-09-01 02:48:39,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d817acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:39, skipping insertion in model container [2023-09-01 02:48:39,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:38" (2/3) ... [2023-09-01 02:48:39,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d817acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:39, skipping insertion in model container [2023-09-01 02:48:39,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:39" (3/3) ... [2023-09-01 02:48:39,042 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-09-01 02:48:39,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:48:39,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-09-01 02:48:39,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:48:39,176 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:48:39,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 346 transitions, 716 flow [2023-09-01 02:48:39,311 INFO L130 PetriNetUnfolder]: 29/343 cut-off events. [2023-09-01 02:48:39,312 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:48:39,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 29/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 586 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 224. Up to 2 conditions per place. [2023-09-01 02:48:39,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 346 transitions, 716 flow [2023-09-01 02:48:39,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 339 transitions, 696 flow [2023-09-01 02:48:39,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:48:39,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 339 transitions, 696 flow [2023-09-01 02:48:39,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 339 transitions, 696 flow [2023-09-01 02:48:39,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 339 transitions, 696 flow [2023-09-01 02:48:39,462 INFO L130 PetriNetUnfolder]: 29/339 cut-off events. [2023-09-01 02:48:39,462 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:48:39,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 29/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 584 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 224. Up to 2 conditions per place. [2023-09-01 02:48:39,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 15754 [2023-09-01 02:49:15,113 INFO L134 LiptonReduction]: Checked pairs total: 16889 [2023-09-01 02:49:15,114 INFO L136 LiptonReduction]: Total number of compositions: 403 [2023-09-01 02:49:15,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:49:15,132 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;@62d8557a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:49:15,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 02:49:15,136 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:49:15,136 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:49:15,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:15,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:15,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:15,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash 44088, now seen corresponding path program 1 times [2023-09-01 02:49:15,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:15,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711487970] [2023-09-01 02:49:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:15,153 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 [2023-09-01 02:49:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:15,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:15,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:49:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:49:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:15,439 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:49:15,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:49:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:15,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:15,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711487970] [2023-09-01 02:49:15,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711487970] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:15,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:15,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44772431] [2023-09-01 02:49:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:15,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 749 [2023-09-01 02:49:15,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:15,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:15,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 749 [2023-09-01 02:49:15,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:17,049 INFO L130 PetriNetUnfolder]: 4987/6234 cut-off events. [2023-09-01 02:49:17,050 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 02:49:17,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12564 conditions, 6234 events. 4987/6234 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 26953 event pairs, 2410 based on Foata normal form. 0/1472 useless extension candidates. Maximal degree in co-relation 10696. Up to 6208 conditions per place. [2023-09-01 02:49:17,089 INFO L137 encePairwiseOnDemand]: 742/749 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 02:49:17,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 224 flow [2023-09-01 02:49:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-09-01 02:49:17,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42679127725856697 [2023-09-01 02:49:17,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-09-01 02:49:17,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-09-01 02:49:17,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:17,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-09-01 02:49:17,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,139 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 3 states and 959 transitions. [2023-09-01 02:49:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 224 flow [2023-09-01 02:49:17,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:49:17,153 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2023-09-01 02:49:17,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-09-01 02:49:17,159 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-09-01 02:49:17,160 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2023-09-01 02:49:17,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:17,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:17,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:17,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:17,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 44089, now seen corresponding path program 1 times [2023-09-01 02:49:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194868966] [2023-09-01 02:49:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:17,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:17,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:17,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:17,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:49:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:17,572 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:49:17,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:49:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:17,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:17,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194868966] [2023-09-01 02:49:17,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194868966] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:17,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:17,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960122664] [2023-09-01 02:49:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:17,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 749 [2023-09-01 02:49:17,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:17,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:17,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 749 [2023-09-01 02:49:17,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:19,720 INFO L130 PetriNetUnfolder]: 9895/12386 cut-off events. [2023-09-01 02:49:19,722 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 02:49:19,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 12386 events. 9895/12386 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 58465 event pairs, 4801 based on Foata normal form. 0/2946 useless extension candidates. Maximal degree in co-relation 24775. Up to 6204 conditions per place. [2023-09-01 02:49:19,797 INFO L137 encePairwiseOnDemand]: 740/749 looper letters, 90 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-09-01 02:49:19,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 404 flow [2023-09-01 02:49:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2023-09-01 02:49:19,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459279038718291 [2023-09-01 02:49:19,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1002 transitions. [2023-09-01 02:49:19,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1002 transitions. [2023-09-01 02:49:19,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:19,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1002 transitions. [2023-09-01 02:49:19,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,811 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 1002 transitions. [2023-09-01 02:49:19,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 404 flow [2023-09-01 02:49:19,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:19,814 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 163 flow [2023-09-01 02:49:19,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-09-01 02:49:19,816 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-09-01 02:49:19,816 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 163 flow [2023-09-01 02:49:19,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:19,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:19,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:49:19,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:20,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:20,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1371881, now seen corresponding path program 1 times [2023-09-01 02:49:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694523757] [2023-09-01 02:49:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:20,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:20,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:20,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:49:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:49:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:20,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:49:20,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:49:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:20,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694523757] [2023-09-01 02:49:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694523757] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:20,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:20,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:49:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838732779] [2023-09-01 02:49:20,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:20,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:49:20,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:49:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:49:22,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 749 [2023-09-01 02:49:22,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:22,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:22,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 749 [2023-09-01 02:49:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:24,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:26,600 INFO L130 PetriNetUnfolder]: 14813/18554 cut-off events. [2023-09-01 02:49:26,601 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 02:49:26,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37159 conditions, 18554 events. 14813/18554 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 90684 event pairs, 7192 based on Foata normal form. 0/4441 useless extension candidates. Maximal degree in co-relation 37150. Up to 6210 conditions per place. [2023-09-01 02:49:26,707 INFO L137 encePairwiseOnDemand]: 737/749 looper letters, 131 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2023-09-01 02:49:26,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 161 transitions, 739 flow [2023-09-01 02:49:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:49:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:49:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1883 transitions. [2023-09-01 02:49:26,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190031152647975 [2023-09-01 02:49:26,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1883 transitions. [2023-09-01 02:49:26,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1883 transitions. [2023-09-01 02:49:26,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:26,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1883 transitions. [2023-09-01 02:49:26,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 313.8333333333333) internal successors, (1883), 6 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:26,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 749.0) internal successors, (5243), 7 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:26,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 749.0) internal successors, (5243), 7 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:26,727 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 163 flow. Second operand 6 states and 1883 transitions. [2023-09-01 02:49:26,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 161 transitions, 739 flow [2023-09-01 02:49:26,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 161 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:49:26,735 INFO L231 Difference]: Finished difference. Result has 63 places, 79 transitions, 355 flow [2023-09-01 02:49:26,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=79} [2023-09-01 02:49:26,737 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-09-01 02:49:26,737 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 79 transitions, 355 flow [2023-09-01 02:49:26,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:26,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:26,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:49:26,750 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 (4)] Ended with exit code 0 [2023-09-01 02:49:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:26,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:26,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash 42582758, now seen corresponding path program 1 times [2023-09-01 02:49:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470536450] [2023-09-01 02:49:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:26,949 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 [2023-09-01 02:49:26,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:26,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:26,952 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 (5)] Waiting until timeout for monitored process [2023-09-01 02:49:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:49:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:27,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:27,142 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:49:27,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:49:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:27,456 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 02:49:27,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 02:49:27,802 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 02:49:27,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 02:49:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:28,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:28,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470536450] [2023-09-01 02:49:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470536450] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:28,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:28,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828951250] [2023-09-01 02:49:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:28,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-09-01 02:49:28,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:28,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:28,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-09-01 02:49:28,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:30,425 INFO L130 PetriNetUnfolder]: 11667/14730 cut-off events. [2023-09-01 02:49:30,425 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 02:49:30,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29583 conditions, 14730 events. 11667/14730 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 72472 event pairs, 5610 based on Foata normal form. 0/3746 useless extension candidates. Maximal degree in co-relation 29570. Up to 14652 conditions per place. [2023-09-01 02:49:30,496 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 71 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-09-01 02:49:30,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 479 flow [2023-09-01 02:49:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 974 transitions. [2023-09-01 02:49:30,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43346684468179797 [2023-09-01 02:49:30,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 974 transitions. [2023-09-01 02:49:30,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 974 transitions. [2023-09-01 02:49:30,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:30,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 974 transitions. [2023-09-01 02:49:30,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:30,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:30,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:30,511 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 355 flow. Second operand 3 states and 974 transitions. [2023-09-01 02:49:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 479 flow [2023-09-01 02:49:30,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 449 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:30,514 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 307 flow [2023-09-01 02:49:30,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2023-09-01 02:49:30,517 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-09-01 02:49:30,518 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 307 flow [2023-09-01 02:49:30,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:30,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:30,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:49:30,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:30,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:30,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:30,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:30,734 INFO L85 PathProgramCache]: Analyzing trace with hash 42582760, now seen corresponding path program 1 times [2023-09-01 02:49:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919652928] [2023-09-01 02:49:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:30,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:30,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:30,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:30,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:49:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:49:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:30,935 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:49:30,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:49:30,958 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:49:30,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:49:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:31,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:49:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:49:31,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:49:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:31,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:31,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919652928] [2023-09-01 02:49:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919652928] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:31,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:49:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993925739] [2023-09-01 02:49:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:31,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:49:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:49:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:49:31,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-09-01 02:49:31,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:31,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:31,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-09-01 02:49:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:32,308 INFO L130 PetriNetUnfolder]: 8365/10750 cut-off events. [2023-09-01 02:49:32,309 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 02:49:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21597 conditions, 10750 events. 8365/10750 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 52869 event pairs, 3990 based on Foata normal form. 0/3056 useless extension candidates. Maximal degree in co-relation 21583. Up to 10672 conditions per place. [2023-09-01 02:49:32,355 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 67 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 02:49:32,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 423 flow [2023-09-01 02:49:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2023-09-01 02:49:32,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325767690253672 [2023-09-01 02:49:32,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2023-09-01 02:49:32,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2023-09-01 02:49:32,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:32,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2023-09-01 02:49:32,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:32,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:32,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:32,367 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 307 flow. Second operand 3 states and 972 transitions. [2023-09-01 02:49:32,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 423 flow [2023-09-01 02:49:32,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:32,369 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 288 flow [2023-09-01 02:49:32,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-09-01 02:49:32,370 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-09-01 02:49:32,370 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 288 flow [2023-09-01 02:49:32,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:32,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:32,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:49:32,379 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 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:32,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:32,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:49:32,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2074879943, now seen corresponding path program 2 times [2023-09-01 02:49:32,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:32,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866105811] [2023-09-01 02:49:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:49:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:32,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:49:32,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:49:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:49:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:32,767 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:49:32,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:49:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:32,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:33,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:33,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866105811] [2023-09-01 02:49:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866105811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:33,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:49:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953005788] [2023-09-01 02:49:33,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:49:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:49:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:49:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 749 [2023-09-01 02:49:39,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 288 flow. Second operand has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:39,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:39,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 749 [2023-09-01 02:49:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:42,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:43,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:44,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:46,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:48,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:50,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:52,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:53,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:55,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:57,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:49:59,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:01,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:02,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:05,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:06,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:07,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:13,876 INFO L130 PetriNetUnfolder]: 27252/35183 cut-off events. [2023-09-01 02:50:13,876 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-09-01 02:50:13,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70546 conditions, 35183 events. 27252/35183 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 193551 event pairs, 13219 based on Foata normal form. 13/10181 useless extension candidates. Maximal degree in co-relation 70531. Up to 3570 conditions per place. [2023-09-01 02:50:14,047 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 380 selfloop transitions, 55 changer transitions 0/438 dead transitions. [2023-09-01 02:50:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 438 transitions, 2138 flow [2023-09-01 02:50:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:50:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:50:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5650 transitions. [2023-09-01 02:50:14,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41907728823616675 [2023-09-01 02:50:14,064 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5650 transitions. [2023-09-01 02:50:14,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5650 transitions. [2023-09-01 02:50:14,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:14,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5650 transitions. [2023-09-01 02:50:14,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 313.8888888888889) internal successors, (5650), 18 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:14,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 749.0) internal successors, (14231), 19 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:14,097 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 749.0) internal successors, (14231), 19 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:14,098 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 288 flow. Second operand 18 states and 5650 transitions. [2023-09-01 02:50:14,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 438 transitions, 2138 flow [2023-09-01 02:50:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 438 transitions, 2137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:14,104 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 690 flow [2023-09-01 02:50:14,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=690, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2023-09-01 02:50:14,105 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-09-01 02:50:14,105 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 690 flow [2023-09-01 02:50:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:50:14,117 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 [2023-09-01 02:50:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:14,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:14,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2027610777, now seen corresponding path program 1 times [2023-09-01 02:50:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:14,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544575705] [2023-09-01 02:50:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:14,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:14,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:14,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:14,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:50:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:50:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:14,476 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:50:14,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:50:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:14,669 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 02:50:14,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 02:50:14,789 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 02:50:14,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 02:50:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:14,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:14,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544575705] [2023-09-01 02:50:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544575705] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:14,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:14,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71399507] [2023-09-01 02:50:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:14,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:15,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 749 [2023-09-01 02:50:15,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 690 flow. Second operand has 4 states, 4 states have (on average 308.5) internal successors, (1234), 4 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:15,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:15,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 749 [2023-09-01 02:50:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:18,468 INFO L130 PetriNetUnfolder]: 26274/33705 cut-off events. [2023-09-01 02:50:18,468 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-09-01 02:50:18,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67756 conditions, 33705 events. 26274/33705 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 1444. Compared 182730 event pairs, 12510 based on Foata normal form. 0/9849 useless extension candidates. Maximal degree in co-relation 67733. Up to 33445 conditions per place. [2023-09-01 02:50:18,671 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 101 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-09-01 02:50:18,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 890 flow [2023-09-01 02:50:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 967 transitions. [2023-09-01 02:50:18,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303515798842902 [2023-09-01 02:50:18,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 967 transitions. [2023-09-01 02:50:18,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 967 transitions. [2023-09-01 02:50:18,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:18,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 967 transitions. [2023-09-01 02:50:18,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:18,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:18,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:18,682 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 690 flow. Second operand 3 states and 967 transitions. [2023-09-01 02:50:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 890 flow [2023-09-01 02:50:18,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 784 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-09-01 02:50:18,687 INFO L231 Difference]: Finished difference. Result has 80 places, 105 transitions, 582 flow [2023-09-01 02:50:18,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=80, PETRI_TRANSITIONS=105} [2023-09-01 02:50:18,688 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-09-01 02:50:18,688 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 105 transitions, 582 flow [2023-09-01 02:50:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.5) internal successors, (1234), 4 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:18,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:18,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:50:18,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:18,898 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:18,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2027610776, now seen corresponding path program 1 times [2023-09-01 02:50:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112191528] [2023-09-01 02:50:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:18,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:18,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:18,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:50:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:50:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:19,075 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 02:50:19,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 02:50:19,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:50:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:50:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:19,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:50:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:19,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:19,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112191528] [2023-09-01 02:50:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112191528] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694797997] [2023-09-01 02:50:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:19,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 749 [2023-09-01 02:50:19,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 105 transitions, 582 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:19,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:19,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 749 [2023-09-01 02:50:19,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:22,387 INFO L130 PetriNetUnfolder]: 24684/31615 cut-off events. [2023-09-01 02:50:22,388 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2023-09-01 02:50:22,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63515 conditions, 31615 events. 24684/31615 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 168468 event pairs, 11720 based on Foata normal form. 0/9555 useless extension candidates. Maximal degree in co-relation 63491. Up to 31355 conditions per place. [2023-09-01 02:50:22,592 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 99 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-09-01 02:50:22,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 778 flow [2023-09-01 02:50:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-09-01 02:50:22,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079661771250555 [2023-09-01 02:50:22,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-09-01 02:50:22,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-09-01 02:50:22,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:22,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-09-01 02:50:22,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:22,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:22,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:22,602 INFO L175 Difference]: Start difference. First operand has 80 places, 105 transitions, 582 flow. Second operand 3 states and 968 transitions. [2023-09-01 02:50:22,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 778 flow [2023-09-01 02:50:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 777 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:22,607 INFO L231 Difference]: Finished difference. Result has 79 places, 103 transitions, 579 flow [2023-09-01 02:50:22,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=579, PETRI_PLACES=79, PETRI_TRANSITIONS=103} [2023-09-01 02:50:22,607 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-09-01 02:50:22,608 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 103 transitions, 579 flow [2023-09-01 02:50:22,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:22,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:22,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:22,624 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 [2023-09-01 02:50:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:22,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:22,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1568562252, now seen corresponding path program 1 times [2023-09-01 02:50:22,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:22,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146386109] [2023-09-01 02:50:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:22,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:22,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:50:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:22,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:50:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:22,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:22,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146386109] [2023-09-01 02:50:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146386109] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:22,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:22,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215581840] [2023-09-01 02:50:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:50:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:50:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:50:23,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-09-01 02:50:23,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 103 transitions, 579 flow. Second operand has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 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) [2023-09-01 02:50:23,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:23,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-09-01 02:50:23,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:26,011 INFO L130 PetriNetUnfolder]: 20199/26908 cut-off events. [2023-09-01 02:50:26,012 INFO L131 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2023-09-01 02:50:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54078 conditions, 26908 events. 20199/26908 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 153888 event pairs, 10594 based on Foata normal form. 2/9395 useless extension candidates. Maximal degree in co-relation 54053. Up to 24730 conditions per place. [2023-09-01 02:50:26,193 INFO L137 encePairwiseOnDemand]: 738/749 looper letters, 125 selfloop transitions, 28 changer transitions 0/155 dead transitions. [2023-09-01 02:50:26,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 155 transitions, 1007 flow [2023-09-01 02:50:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:50:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:50:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1600 transitions. [2023-09-01 02:50:26,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272363150867824 [2023-09-01 02:50:26,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1600 transitions. [2023-09-01 02:50:26,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1600 transitions. [2023-09-01 02:50:26,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:26,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1600 transitions. [2023-09-01 02:50:26,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:26,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:26,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:26,205 INFO L175 Difference]: Start difference. First operand has 79 places, 103 transitions, 579 flow. Second operand 5 states and 1600 transitions. [2023-09-01 02:50:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 155 transitions, 1007 flow [2023-09-01 02:50:26,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 155 transitions, 1006 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:26,210 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 690 flow [2023-09-01 02:50:26,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=690, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-09-01 02:50:26,211 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-09-01 02:50:26,211 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 690 flow [2023-09-01 02:50:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 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) [2023-09-01 02:50:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:26,224 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 [2023-09-01 02:50:26,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:26,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:26,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1381225625, now seen corresponding path program 1 times [2023-09-01 02:50:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211192892] [2023-09-01 02:50:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:26,423 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 [2023-09-01 02:50:26,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:26,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:26,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:50:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:50:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:26,638 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 02:50:26,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 02:50:26,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2023-09-01 02:50:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:50:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:26,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:50:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:26,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:26,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211192892] [2023-09-01 02:50:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211192892] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:26,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988689807] [2023-09-01 02:50:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:50:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:50:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:50:27,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 749 [2023-09-01 02:50:27,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 690 flow. Second operand has 5 states, 5 states have (on average 307.6) internal successors, (1538), 5 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:27,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:27,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 749 [2023-09-01 02:50:27,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:30,294 INFO L130 PetriNetUnfolder]: 22887/29160 cut-off events. [2023-09-01 02:50:30,294 INFO L131 PetriNetUnfolder]: For 1318/1419 co-relation queries the response was YES. [2023-09-01 02:50:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64318 conditions, 29160 events. 22887/29160 cut-off events. For 1318/1419 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 151709 event pairs, 10748 based on Foata normal form. 101/11026 useless extension candidates. Maximal degree in co-relation 64289. Up to 28960 conditions per place. [2023-09-01 02:50:30,469 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 99 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 02:50:30,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 886 flow [2023-09-01 02:50:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 960 transitions. [2023-09-01 02:50:30,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272363150867824 [2023-09-01 02:50:30,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 960 transitions. [2023-09-01 02:50:30,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 960 transitions. [2023-09-01 02:50:30,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:30,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 960 transitions. [2023-09-01 02:50:30,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:30,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:30,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:30,477 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 690 flow. Second operand 3 states and 960 transitions. [2023-09-01 02:50:30,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 886 flow [2023-09-01 02:50:30,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 854 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:30,484 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 656 flow [2023-09-01 02:50:30,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=656, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2023-09-01 02:50:30,485 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-09-01 02:50:30,485 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 656 flow [2023-09-01 02:50:30,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.6) internal successors, (1538), 5 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:30,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:30,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:30,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:30,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:30,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:30,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1381225624, now seen corresponding path program 1 times [2023-09-01 02:50:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605630087] [2023-09-01 02:50:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:30,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:30,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:30,697 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:30,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:50:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:50:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:30,856 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:50:30,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 02:50:30,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:30,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:50:30,937 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:50:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:50:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:30,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:30,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:30,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605630087] [2023-09-01 02:50:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605630087] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:30,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:30,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:30,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372236338] [2023-09-01 02:50:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:30,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:31,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 749 [2023-09-01 02:50:31,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 656 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:31,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:31,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 749 [2023-09-01 02:50:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:33,698 INFO L130 PetriNetUnfolder]: 22024/27972 cut-off events. [2023-09-01 02:50:33,699 INFO L131 PetriNetUnfolder]: For 1230/1326 co-relation queries the response was YES. [2023-09-01 02:50:33,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61666 conditions, 27972 events. 22024/27972 cut-off events. For 1230/1326 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 143572 event pairs, 10333 based on Foata normal form. 96/10760 useless extension candidates. Maximal degree in co-relation 61636. Up to 27772 conditions per place. [2023-09-01 02:50:33,860 INFO L137 encePairwiseOnDemand]: 746/749 looper letters, 97 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 02:50:33,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 848 flow [2023-09-01 02:50:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 952 transitions. [2023-09-01 02:50:33,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236760124610592 [2023-09-01 02:50:33,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 952 transitions. [2023-09-01 02:50:33,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 952 transitions. [2023-09-01 02:50:33,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:33,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 952 transitions. [2023-09-01 02:50:33,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:33,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:33,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 749.0) internal successors, (2996), 4 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:33,868 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 656 flow. Second operand 3 states and 952 transitions. [2023-09-01 02:50:33,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 848 flow [2023-09-01 02:50:33,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 102 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:33,874 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 653 flow [2023-09-01 02:50:33,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=653, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2023-09-01 02:50:33,875 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2023-09-01 02:50:33,875 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 653 flow [2023-09-01 02:50:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:33,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:33,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:33,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:34,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:34,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:34,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash -131690291, now seen corresponding path program 1 times [2023-09-01 02:50:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776467399] [2023-09-01 02:50:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:34,086 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:34,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:50:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:50:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:34,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:34,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776467399] [2023-09-01 02:50:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776467399] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:34,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:34,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:50:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121562336] [2023-09-01 02:50:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:50:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:50:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:50:34,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-09-01 02:50:34,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 653 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:34,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:34,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-09-01 02:50:34,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:37,211 INFO L130 PetriNetUnfolder]: 18891/24723 cut-off events. [2023-09-01 02:50:37,212 INFO L131 PetriNetUnfolder]: For 2062/2122 co-relation queries the response was YES. [2023-09-01 02:50:37,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55290 conditions, 24723 events. 18891/24723 cut-off events. For 2062/2122 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 134866 event pairs, 10131 based on Foata normal form. 60/10702 useless extension candidates. Maximal degree in co-relation 55259. Up to 23974 conditions per place. [2023-09-01 02:50:37,430 INFO L137 encePairwiseOnDemand]: 738/749 looper letters, 109 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2023-09-01 02:50:37,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 1017 flow [2023-09-01 02:50:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:50:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:50:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1582 transitions. [2023-09-01 02:50:37,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224299065420561 [2023-09-01 02:50:37,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1582 transitions. [2023-09-01 02:50:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1582 transitions. [2023-09-01 02:50:37,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:37,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1582 transitions. [2023-09-01 02:50:37,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:37,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:37,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:37,442 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 653 flow. Second operand 5 states and 1582 transitions. [2023-09-01 02:50:37,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 1017 flow [2023-09-01 02:50:37,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 140 transitions, 1016 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:37,449 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 723 flow [2023-09-01 02:50:37,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=723, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-09-01 02:50:37,450 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-09-01 02:50:37,450 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 723 flow [2023-09-01 02:50:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:37,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:37,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:37,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:37,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:37,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:37,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 836960869, now seen corresponding path program 1 times [2023-09-01 02:50:37,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:37,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675803907] [2023-09-01 02:50:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:37,662 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:37,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:50:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:50:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:37,868 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:50:37,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:50:37,901 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:50:37,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:50:37,924 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:50:37,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:50:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:50:37,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:37,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:37,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675803907] [2023-09-01 02:50:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675803907] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:37,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617353153] [2023-09-01 02:50:37,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:37,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:38,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 749 [2023-09-01 02:50:38,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 723 flow. Second operand has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:38,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:38,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 749 [2023-09-01 02:50:38,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:40,110 INFO L130 PetriNetUnfolder]: 15538/19914 cut-off events. [2023-09-01 02:50:40,110 INFO L131 PetriNetUnfolder]: For 2568/2649 co-relation queries the response was YES. [2023-09-01 02:50:40,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48048 conditions, 19914 events. 15538/19914 cut-off events. For 2568/2649 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 101109 event pairs, 7259 based on Foata normal form. 81/10147 useless extension candidates. Maximal degree in co-relation 48014. Up to 19750 conditions per place. [2023-09-01 02:50:40,317 INFO L137 encePairwiseOnDemand]: 745/749 looper letters, 84 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-09-01 02:50:40,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 101 transitions, 909 flow [2023-09-01 02:50:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:50:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:50:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1218 transitions. [2023-09-01 02:50:40,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40654205607476634 [2023-09-01 02:50:40,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1218 transitions. [2023-09-01 02:50:40,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1218 transitions. [2023-09-01 02:50:40,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:40,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1218 transitions. [2023-09-01 02:50:40,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:40,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:40,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:40,325 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 723 flow. Second operand 4 states and 1218 transitions. [2023-09-01 02:50:40,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 101 transitions, 909 flow [2023-09-01 02:50:40,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 101 transitions, 858 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:50:40,348 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 690 flow [2023-09-01 02:50:40,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=690, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2023-09-01 02:50:40,349 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 24 predicate places. [2023-09-01 02:50:40,349 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 690 flow [2023-09-01 02:50:40,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:40,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:40,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:40,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 02:50:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:40,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:50:40,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 836960870, now seen corresponding path program 1 times [2023-09-01 02:50:40,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:40,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446252911] [2023-09-01 02:50:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:40,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:40,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:50:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:40,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 02:50:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:40,811 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:50:40,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:50:40,888 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:50:40,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:50:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:40,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:50:41,000 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:50:41,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:50:41,042 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 02:50:41,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 02:50:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:50:41,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:50:43,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:43,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446252911] [2023-09-01 02:50:43,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446252911] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:43,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:50:43,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:50:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528342885] [2023-09-01 02:50:43,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:43,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:50:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:50:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:50:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 749 [2023-09-01 02:50:49,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 690 flow. Second operand has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:49,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:49,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 749 [2023-09-01 02:50:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:59,381 WARN L222 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:51:05,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:07,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:09,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:51:11,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:13,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:15,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:17,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:51:19,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:21,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:31,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:41,373 INFO L130 PetriNetUnfolder]: 36917/48833 cut-off events. [2023-09-01 02:51:41,373 INFO L131 PetriNetUnfolder]: For 8021/8146 co-relation queries the response was YES. [2023-09-01 02:51:41,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116650 conditions, 48833 events. 36917/48833 cut-off events. For 8021/8146 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 306622 event pairs, 14735 based on Foata normal form. 223/25687 useless extension candidates. Maximal degree in co-relation 116616. Up to 13105 conditions per place. [2023-09-01 02:51:41,788 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 362 selfloop transitions, 82 changer transitions 0/447 dead transitions. [2023-09-01 02:51:41,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 447 transitions, 2753 flow [2023-09-01 02:51:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 02:51:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 02:51:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5829 transitions. [2023-09-01 02:51:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891188251001335 [2023-09-01 02:51:41,799 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5829 transitions. [2023-09-01 02:51:41,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5829 transitions. [2023-09-01 02:51:41,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:41,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5829 transitions. [2023-09-01 02:51:41,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 291.45) internal successors, (5829), 20 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:41,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 749.0) internal successors, (15729), 21 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:41,818 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 749.0) internal successors, (15729), 21 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:41,818 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 690 flow. Second operand 20 states and 5829 transitions. [2023-09-01 02:51:41,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 447 transitions, 2753 flow [2023-09-01 02:51:41,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 447 transitions, 2740 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:51:41,911 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1221 flow [2023-09-01 02:51:41,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1221, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2023-09-01 02:51:41,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 48 predicate places. [2023-09-01 02:51:41,912 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1221 flow [2023-09-01 02:51:41,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 273.6666666666667) internal successors, (3284), 12 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:41,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:41,913 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1] [2023-09-01 02:51:41,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:42,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:51:42,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 798429972, now seen corresponding path program 1 times [2023-09-01 02:51:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086074622] [2023-09-01 02:51:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:42,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:42,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:42,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:51:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:51:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:42,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:51:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:51:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:51:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:43,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086074622] [2023-09-01 02:51:43,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086074622] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:51:43,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:51:43,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2023-09-01 02:51:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354719177] [2023-09-01 02:51:43,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:51:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 02:51:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 02:51:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-09-01 02:51:55,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 749 [2023-09-01 02:51:55,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1221 flow. Second operand has 19 states, 19 states have (on average 282.10526315789474) internal successors, (5360), 19 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:55,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:55,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 749 [2023-09-01 02:51:55,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:52:00,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:52:21,125 INFO L130 PetriNetUnfolder]: 67696/89166 cut-off events. [2023-09-01 02:52:21,125 INFO L131 PetriNetUnfolder]: For 92504/94613 co-relation queries the response was YES. [2023-09-01 02:52:21,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259809 conditions, 89166 events. 67696/89166 cut-off events. For 92504/94613 co-relation queries the response was YES. Maximal size of possible extension queue 3917. Compared 600254 event pairs, 35310 based on Foata normal form. 2117/48398 useless extension candidates. Maximal degree in co-relation 259768. Up to 28170 conditions per place. [2023-09-01 02:52:22,031 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 508 selfloop transitions, 92 changer transitions 0/611 dead transitions. [2023-09-01 02:52:22,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 611 transitions, 4141 flow [2023-09-01 02:52:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:52:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:52:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7269 transitions. [2023-09-01 02:52:22,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043724966622163 [2023-09-01 02:52:22,042 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7269 transitions. [2023-09-01 02:52:22,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7269 transitions. [2023-09-01 02:52:22,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:52:22,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7269 transitions. [2023-09-01 02:52:22,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 302.875) internal successors, (7269), 24 states have internal predecessors, (7269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:22,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:22,067 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:22,067 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1221 flow. Second operand 24 states and 7269 transitions. [2023-09-01 02:52:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 611 transitions, 4141 flow [2023-09-01 02:52:22,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 611 transitions, 3963 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-09-01 02:52:22,917 INFO L231 Difference]: Finished difference. Result has 136 places, 171 transitions, 1560 flow [2023-09-01 02:52:22,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1560, PETRI_PLACES=136, PETRI_TRANSITIONS=171} [2023-09-01 02:52:22,918 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 73 predicate places. [2023-09-01 02:52:22,918 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 171 transitions, 1560 flow [2023-09-01 02:52:22,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 282.10526315789474) internal successors, (5360), 19 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:22,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:52:22,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:52:22,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-09-01 02:52:23,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:23,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:52:23,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:52:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1988182828, now seen corresponding path program 1 times [2023-09-01 02:52:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:52:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406899425] [2023-09-01 02:52:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:52:23,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:23,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:52:23,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:52:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:52:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:52:23,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:52:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:52:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:23,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:52:23,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:52:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406899425] [2023-09-01 02:52:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406899425] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:52:23,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:52:23,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:52:23,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383413928] [2023-09-01 02:52:23,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:52:23,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:52:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:52:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:52:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:52:23,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 749 [2023-09-01 02:52:23,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 171 transitions, 1560 flow. Second operand has 5 states, 5 states have (on average 301.2) internal successors, (1506), 5 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:23,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:52:23,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 749 [2023-09-01 02:52:23,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:52:33,549 INFO L130 PetriNetUnfolder]: 61158/82278 cut-off events. [2023-09-01 02:52:33,550 INFO L131 PetriNetUnfolder]: For 95238/97195 co-relation queries the response was YES. [2023-09-01 02:52:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249480 conditions, 82278 events. 61158/82278 cut-off events. For 95238/97195 co-relation queries the response was YES. Maximal size of possible extension queue 3723. Compared 559752 event pairs, 36805 based on Foata normal form. 1957/49900 useless extension candidates. Maximal degree in co-relation 249434. Up to 81510 conditions per place. [2023-09-01 02:52:34,495 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 133 selfloop transitions, 52 changer transitions 0/195 dead transitions. [2023-09-01 02:52:34,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 195 transitions, 2002 flow [2023-09-01 02:52:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:52:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:52:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-09-01 02:52:34,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418958611481976 [2023-09-01 02:52:34,498 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-09-01 02:52:34,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-09-01 02:52:34,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:52:34,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-09-01 02:52:34,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:34,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:34,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:34,502 INFO L175 Difference]: Start difference. First operand has 136 places, 171 transitions, 1560 flow. Second operand 5 states and 1569 transitions. [2023-09-01 02:52:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 195 transitions, 2002 flow [2023-09-01 02:52:35,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 195 transitions, 1948 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-09-01 02:52:35,190 INFO L231 Difference]: Finished difference. Result has 140 places, 172 transitions, 1631 flow [2023-09-01 02:52:35,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1631, PETRI_PLACES=140, PETRI_TRANSITIONS=172} [2023-09-01 02:52:35,191 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 77 predicate places. [2023-09-01 02:52:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 172 transitions, 1631 flow [2023-09-01 02:52:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.2) internal successors, (1506), 5 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:35,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:52:35,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:52:35,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 02:52:35,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:35,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:52:35,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:52:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash 175995824, now seen corresponding path program 1 times [2023-09-01 02:52:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:52:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480034590] [2023-09-01 02:52:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:52:35,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:52:35,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:52:35,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:52:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:52:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:52:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:52:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:52:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:52:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:52:35,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:52:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480034590] [2023-09-01 02:52:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480034590] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:52:35,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:52:35,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:52:35,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036159100] [2023-09-01 02:52:35,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:52:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:52:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:52:35,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:52:35,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:52:36,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 749 [2023-09-01 02:52:36,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 172 transitions, 1631 flow. Second operand has 12 states, 12 states have (on average 293.8333333333333) internal successors, (3526), 12 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:36,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:52:36,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 749 [2023-09-01 02:52:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:52:50,181 INFO L130 PetriNetUnfolder]: 71944/93881 cut-off events. [2023-09-01 02:52:50,181 INFO L131 PetriNetUnfolder]: For 55978/56110 co-relation queries the response was YES. [2023-09-01 02:52:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281053 conditions, 93881 events. 71944/93881 cut-off events. For 55978/56110 co-relation queries the response was YES. Maximal size of possible extension queue 4173. Compared 596163 event pairs, 17679 based on Foata normal form. 1697/54107 useless extension candidates. Maximal degree in co-relation 281003. Up to 39172 conditions per place. [2023-09-01 02:52:51,352 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 176 selfloop transitions, 97 changer transitions 0/277 dead transitions. [2023-09-01 02:52:51,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 277 transitions, 2529 flow [2023-09-01 02:52:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:52:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:52:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4252 transitions. [2023-09-01 02:52:51,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40549303833683004 [2023-09-01 02:52:51,357 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4252 transitions. [2023-09-01 02:52:51,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4252 transitions. [2023-09-01 02:52:51,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:52:51,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4252 transitions. [2023-09-01 02:52:51,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 303.7142857142857) internal successors, (4252), 14 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:51,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:51,368 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:51,368 INFO L175 Difference]: Start difference. First operand has 140 places, 172 transitions, 1631 flow. Second operand 14 states and 4252 transitions. [2023-09-01 02:52:51,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 277 transitions, 2529 flow [2023-09-01 02:52:52,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 277 transitions, 2428 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 02:52:52,964 INFO L231 Difference]: Finished difference. Result has 154 places, 176 transitions, 1802 flow [2023-09-01 02:52:52,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1802, PETRI_PLACES=154, PETRI_TRANSITIONS=176} [2023-09-01 02:52:52,964 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 91 predicate places. [2023-09-01 02:52:52,965 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 176 transitions, 1802 flow [2023-09-01 02:52:52,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 293.8333333333333) internal successors, (3526), 12 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:52,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:52:52,965 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:52:52,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:52:53,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:53,172 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:52:53,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:52:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 184769081, now seen corresponding path program 3 times [2023-09-01 02:52:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:52:53,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161940328] [2023-09-01 02:52:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:52:53,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:52:53,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:52:53,174 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:52:53,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:52:53,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:52:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:52:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:52:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:52:53,449 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:52:53,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:52:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:53,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:52:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:56,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:52:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161940328] [2023-09-01 02:52:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161940328] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:52:56,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:52:56,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:52:56,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173218177] [2023-09-01 02:52:56,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:52:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:52:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:52:56,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:52:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:53:27,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 749 [2023-09-01 02:53:27,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 176 transitions, 1802 flow. Second operand has 24 states, 24 states have (on average 290.0) internal successors, (6960), 24 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:27,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:53:27,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 749 [2023-09-01 02:53:27,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:53:42,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:44,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:46,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:48,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:50,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:52,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:54,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:56,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:53:58,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:00,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:02,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:07,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:09,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:11,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:13,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:15,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:17,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:19,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:21,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:23,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:25,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:41,714 INFO L130 PetriNetUnfolder]: 72395/95593 cut-off events. [2023-09-01 02:54:41,714 INFO L131 PetriNetUnfolder]: For 280878/285556 co-relation queries the response was YES. [2023-09-01 02:54:42,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321839 conditions, 95593 events. 72395/95593 cut-off events. For 280878/285556 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 627496 event pairs, 38151 based on Foata normal form. 4711/63192 useless extension candidates. Maximal degree in co-relation 321786. Up to 25201 conditions per place. [2023-09-01 02:54:43,057 INFO L137 encePairwiseOnDemand]: 739/749 looper letters, 382 selfloop transitions, 137 changer transitions 0/531 dead transitions. [2023-09-01 02:54:43,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 531 transitions, 4612 flow [2023-09-01 02:54:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 02:54:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 02:54:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7684 transitions. [2023-09-01 02:54:43,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41036048064085445 [2023-09-01 02:54:43,067 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7684 transitions. [2023-09-01 02:54:43,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7684 transitions. [2023-09-01 02:54:43,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:54:43,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7684 transitions. [2023-09-01 02:54:43,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 307.36) internal successors, (7684), 25 states have internal predecessors, (7684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:43,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 749.0) internal successors, (19474), 26 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:43,090 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 749.0) internal successors, (19474), 26 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:43,090 INFO L175 Difference]: Start difference. First operand has 154 places, 176 transitions, 1802 flow. Second operand 25 states and 7684 transitions. [2023-09-01 02:54:43,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 531 transitions, 4612 flow [2023-09-01 02:54:44,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 531 transitions, 4391 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-09-01 02:54:44,524 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2487 flow [2023-09-01 02:54:44,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2487, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2023-09-01 02:54:44,525 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 126 predicate places. [2023-09-01 02:54:44,525 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2487 flow [2023-09-01 02:54:44,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 290.0) internal successors, (6960), 24 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:44,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:54:44,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:54:44,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 02:54:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:54:44,726 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:54:44,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:54:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1174017190, now seen corresponding path program 1 times [2023-09-01 02:54:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:54:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127732749] [2023-09-01 02:54:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:54:44,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:54:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:54:44,728 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:54:44,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 02:54:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:54:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:54:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:54:44,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:54:44,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:54:44,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:54:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:54:44,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:54:44,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:54:44,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127732749] [2023-09-01 02:54:44,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127732749] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:54:44,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:54:44,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:54:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504970790] [2023-09-01 02:54:44,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:54:44,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:54:44,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:54:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:54:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:54:45,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 749 [2023-09-01 02:54:45,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2487 flow. Second operand has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:45,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:54:45,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 749 [2023-09-01 02:54:45,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:54:55,736 INFO L130 PetriNetUnfolder]: 52792/69646 cut-off events. [2023-09-01 02:54:55,736 INFO L131 PetriNetUnfolder]: For 152895/156267 co-relation queries the response was YES. [2023-09-01 02:54:56,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232239 conditions, 69646 events. 52792/69646 cut-off events. For 152895/156267 co-relation queries the response was YES. Maximal size of possible extension queue 2785. Compared 436963 event pairs, 26680 based on Foata normal form. 3372/49458 useless extension candidates. Maximal degree in co-relation 232171. Up to 68994 conditions per place. [2023-09-01 02:54:56,871 INFO L137 encePairwiseOnDemand]: 745/749 looper letters, 169 selfloop transitions, 34 changer transitions 0/215 dead transitions. [2023-09-01 02:54:56,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 215 transitions, 2885 flow [2023-09-01 02:54:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:54:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:54:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1216 transitions. [2023-09-01 02:54:56,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40587449933244324 [2023-09-01 02:54:56,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1216 transitions. [2023-09-01 02:54:56,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1216 transitions. [2023-09-01 02:54:56,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:54:56,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1216 transitions. [2023-09-01 02:54:56,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:56,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:56,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 749.0) internal successors, (3745), 5 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:56,876 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2487 flow. Second operand 4 states and 1216 transitions. [2023-09-01 02:54:56,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 215 transitions, 2885 flow [2023-09-01 02:54:57,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 215 transitions, 2609 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-09-01 02:54:57,345 INFO L231 Difference]: Finished difference. Result has 181 places, 215 transitions, 2271 flow [2023-09-01 02:54:57,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2271, PETRI_PLACES=181, PETRI_TRANSITIONS=215} [2023-09-01 02:54:57,345 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 118 predicate places. [2023-09-01 02:54:57,345 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 215 transitions, 2271 flow [2023-09-01 02:54:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:54:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:54:57,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 02:54:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:54:57,547 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:54:57,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:54:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1174017191, now seen corresponding path program 1 times [2023-09-01 02:54:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:54:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601967307] [2023-09-01 02:54:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:54:57,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:54:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:54:57,548 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:54:57,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 02:54:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:54:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 02:54:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:54:57,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:54:57,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:54:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:54:57,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:54:57,832 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:54:57,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:54:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:54:58,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:54:58,347 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 02:54:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:54:58,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:54:58,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601967307] [2023-09-01 02:54:58,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601967307] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:54:58,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:54:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:54:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134755227] [2023-09-01 02:54:58,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:54:58,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:54:58,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:54:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:54:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:55:03,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 749 [2023-09-01 02:55:03,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 215 transitions, 2271 flow. Second operand has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:03,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:03,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 749 [2023-09-01 02:55:03,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:24,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:55:29,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 02:55:31,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:55:48,011 INFO L130 PetriNetUnfolder]: 70083/95313 cut-off events. [2023-09-01 02:55:48,011 INFO L131 PetriNetUnfolder]: For 312892/317980 co-relation queries the response was YES. [2023-09-01 02:55:49,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324460 conditions, 95313 events. 70083/95313 cut-off events. For 312892/317980 co-relation queries the response was YES. Maximal size of possible extension queue 3951. Compared 671893 event pairs, 26034 based on Foata normal form. 5152/72999 useless extension candidates. Maximal degree in co-relation 324391. Up to 36926 conditions per place. [2023-09-01 02:55:49,593 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 311 selfloop transitions, 128 changer transitions 0/449 dead transitions. [2023-09-01 02:55:49,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 449 transitions, 4049 flow [2023-09-01 02:55:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 02:55:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 02:55:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7651 transitions. [2023-09-01 02:55:49,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37833160263066806 [2023-09-01 02:55:49,606 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7651 transitions. [2023-09-01 02:55:49,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7651 transitions. [2023-09-01 02:55:49,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:49,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7651 transitions. [2023-09-01 02:55:49,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 283.3703703703704) internal successors, (7651), 27 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:49,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 749.0) internal successors, (20972), 28 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:49,633 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 749.0) internal successors, (20972), 28 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:49,633 INFO L175 Difference]: Start difference. First operand has 181 places, 215 transitions, 2271 flow. Second operand 27 states and 7651 transitions. [2023-09-01 02:55:49,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 449 transitions, 4049 flow [2023-09-01 02:55:50,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 449 transitions, 4010 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 02:55:50,450 INFO L231 Difference]: Finished difference. Result has 212 places, 225 transitions, 2600 flow [2023-09-01 02:55:50,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2600, PETRI_PLACES=212, PETRI_TRANSITIONS=225} [2023-09-01 02:55:50,450 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 149 predicate places. [2023-09-01 02:55:50,450 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 225 transitions, 2600 flow [2023-09-01 02:55:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:50,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:50,451 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:55:50,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:50,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:55:50,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1947860758, now seen corresponding path program 2 times [2023-09-01 02:55:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715055591] [2023-09-01 02:55:50,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:55:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:50,654 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:50,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 02:55:50,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:55:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:55:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:55:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:50,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:55:50,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:55:50,939 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:55:50,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:55:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:55:51,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:55:51,024 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:55:51,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:55:51,060 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 02:55:51,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 02:55:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 02:55:51,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:51,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:51,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715055591] [2023-09-01 02:55:51,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715055591] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:51,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:51,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:55:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504153085] [2023-09-01 02:55:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:55:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:55:51,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:55:51,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 749 [2023-09-01 02:55:51,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 225 transitions, 2600 flow. Second operand has 5 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:51,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:51,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 749 [2023-09-01 02:55:51,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:10,533 INFO L130 PetriNetUnfolder]: 75422/103189 cut-off events. [2023-09-01 02:56:10,533 INFO L131 PetriNetUnfolder]: For 278042/282937 co-relation queries the response was YES. [2023-09-01 02:56:12,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394066 conditions, 103189 events. 75422/103189 cut-off events. For 278042/282937 co-relation queries the response was YES. Maximal size of possible extension queue 4275. Compared 722375 event pairs, 20549 based on Foata normal form. 6617/77459 useless extension candidates. Maximal degree in co-relation 393990. Up to 66103 conditions per place. [2023-09-01 02:56:12,562 INFO L137 encePairwiseOnDemand]: 744/749 looper letters, 205 selfloop transitions, 38 changer transitions 0/252 dead transitions. [2023-09-01 02:56:12,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 252 transitions, 3224 flow [2023-09-01 02:56:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1518 transitions. [2023-09-01 02:56:12,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40534045393858475 [2023-09-01 02:56:12,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1518 transitions. [2023-09-01 02:56:12,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1518 transitions. [2023-09-01 02:56:12,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:12,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1518 transitions. [2023-09-01 02:56:12,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.6) internal successors, (1518), 5 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:12,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:12,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 749.0) internal successors, (4494), 6 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:12,569 INFO L175 Difference]: Start difference. First operand has 212 places, 225 transitions, 2600 flow. Second operand 5 states and 1518 transitions. [2023-09-01 02:56:12,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 252 transitions, 3224 flow [2023-09-01 02:56:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 252 transitions, 3147 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-09-01 02:56:15,724 INFO L231 Difference]: Finished difference. Result has 213 places, 226 transitions, 2645 flow [2023-09-01 02:56:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2645, PETRI_PLACES=213, PETRI_TRANSITIONS=226} [2023-09-01 02:56:15,725 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 150 predicate places. [2023-09-01 02:56:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 226 transitions, 2645 flow [2023-09-01 02:56:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:15,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:15,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:56:15,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2034805261, now seen corresponding path program 1 times [2023-09-01 02:56:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:15,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915875940] [2023-09-01 02:56:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:15,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:15,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:15,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 02:56:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:56:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:56:16,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:56:16,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915875940] [2023-09-01 02:56:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915875940] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:16,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:56:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:56:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172234852] [2023-09-01 02:56:16,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:56:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:56:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:56:17,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 749 [2023-09-01 02:56:17,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 226 transitions, 2645 flow. Second operand has 12 states, 12 states have (on average 294.1666666666667) internal successors, (3530), 12 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:17,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:17,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 749 [2023-09-01 02:56:17,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:35,007 INFO L130 PetriNetUnfolder]: 73064/100373 cut-off events. [2023-09-01 02:56:35,007 INFO L131 PetriNetUnfolder]: For 391179/401412 co-relation queries the response was YES. [2023-09-01 02:56:36,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388297 conditions, 100373 events. 73064/100373 cut-off events. For 391179/401412 co-relation queries the response was YES. Maximal size of possible extension queue 4311. Compared 728967 event pairs, 26627 based on Foata normal form. 11287/81438 useless extension candidates. Maximal degree in co-relation 388220. Up to 57114 conditions per place. [2023-09-01 02:56:36,818 INFO L137 encePairwiseOnDemand]: 735/749 looper letters, 191 selfloop transitions, 120 changer transitions 0/321 dead transitions. [2023-09-01 02:56:36,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 321 transitions, 3658 flow [2023-09-01 02:56:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:56:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:56:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4237 transitions. [2023-09-01 02:56:36,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040625596032806 [2023-09-01 02:56:36,823 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4237 transitions. [2023-09-01 02:56:36,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4237 transitions. [2023-09-01 02:56:36,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:36,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4237 transitions. [2023-09-01 02:56:36,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 302.64285714285717) internal successors, (4237), 14 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,836 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 749.0) internal successors, (11235), 15 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,836 INFO L175 Difference]: Start difference. First operand has 213 places, 226 transitions, 2645 flow. Second operand 14 states and 4237 transitions. [2023-09-01 02:56:36,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 321 transitions, 3658 flow [2023-09-01 02:56:44,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 321 transitions, 3543 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-09-01 02:56:44,181 INFO L231 Difference]: Finished difference. Result has 224 places, 228 transitions, 2816 flow [2023-09-01 02:56:44,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2816, PETRI_PLACES=224, PETRI_TRANSITIONS=228} [2023-09-01 02:56:44,182 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 161 predicate places. [2023-09-01 02:56:44,182 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 228 transitions, 2816 flow [2023-09-01 02:56:44,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 294.1666666666667) internal successors, (3530), 12 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:44,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:44,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:44,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:44,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:44,384 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:56:44,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1333744019, now seen corresponding path program 1 times [2023-09-01 02:56:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:44,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924262145] [2023-09-01 02:56:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:44,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:44,386 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:44,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 02:56:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:44,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 02:56:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:44,689 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:56:44,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:56:44,775 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:56:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:56:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:56:44,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:56:44,882 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:56:44,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:56:44,923 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 02:56:44,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 02:56:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:56:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:56:49,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924262145] [2023-09-01 02:56:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924262145] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:49,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:56:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:56:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688733650] [2023-09-01 02:56:49,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:56:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:56:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:56:55,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:00,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 749 [2023-09-01 02:57:00,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 228 transitions, 2816 flow. Second operand has 12 states, 12 states have (on average 274.3333333333333) internal successors, (3292), 12 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:00,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:00,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 749 [2023-09-01 02:57:00,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:08,601 WARN L222 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:10,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:15,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:17,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:57:26,675 WARN L222 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:37,601 WARN L222 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:57:53,827 INFO L130 PetriNetUnfolder]: 58920/85251 cut-off events. [2023-09-01 02:57:53,827 INFO L131 PetriNetUnfolder]: For 256898/267611 co-relation queries the response was YES. [2023-09-01 02:57:55,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330871 conditions, 85251 events. 58920/85251 cut-off events. For 256898/267611 co-relation queries the response was YES. Maximal size of possible extension queue 3411. Compared 653039 event pairs, 22399 based on Foata normal form. 10739/72476 useless extension candidates. Maximal degree in co-relation 330793. Up to 20958 conditions per place. [2023-09-01 02:57:55,337 INFO L137 encePairwiseOnDemand]: 732/749 looper letters, 374 selfloop transitions, 142 changer transitions 0/531 dead transitions. [2023-09-01 02:57:55,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 531 transitions, 5337 flow [2023-09-01 02:57:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:57:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:57:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6878 transitions. [2023-09-01 02:57:55,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826212728081887 [2023-09-01 02:57:55,344 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6878 transitions. [2023-09-01 02:57:55,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6878 transitions. [2023-09-01 02:57:55,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:55,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6878 transitions. [2023-09-01 02:57:55,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 286.5833333333333) internal successors, (6878), 24 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:55,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:55,501 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 749.0) internal successors, (18725), 25 states have internal predecessors, (18725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:55,501 INFO L175 Difference]: Start difference. First operand has 224 places, 228 transitions, 2816 flow. Second operand 24 states and 6878 transitions. [2023-09-01 02:57:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 531 transitions, 5337 flow [2023-09-01 02:57:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 531 transitions, 5107 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-09-01 02:57:59,024 INFO L231 Difference]: Finished difference. Result has 245 places, 268 transitions, 3125 flow [2023-09-01 02:57:59,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3125, PETRI_PLACES=245, PETRI_TRANSITIONS=268} [2023-09-01 02:57:59,024 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 182 predicate places. [2023-09-01 02:57:59,024 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 268 transitions, 3125 flow [2023-09-01 02:57:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 274.3333333333333) internal successors, (3292), 12 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:59,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:59,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:57:59,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:57:59,226 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:57:59,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash 91900425, now seen corresponding path program 2 times [2023-09-01 02:57:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:57:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495902620] [2023-09-01 02:57:59,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:57:59,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:57:59,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:57:59,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:57:59,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 02:57:59,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:57:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:57:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:59,484 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 02:57:59,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 02:57:59,559 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:57:59,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:57:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:57:59,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:57:59,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:57:59,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 02:57:59,720 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-09-01 02:57:59,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 02:57:59,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 02:57:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 02:57:59,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 02:58:03,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:58:03,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495902620] [2023-09-01 02:58:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495902620] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:58:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2023-09-01 02:58:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580780093] [2023-09-01 02:58:03,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:03,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:58:03,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:58:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:58:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:58:05,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:07,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:09,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:13,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:14,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:16,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:18,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:21,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:25,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:28,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:30,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:32,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:35,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:39,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:41,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:44,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:45,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:46,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:48,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:50,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:53,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:58:56,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:01,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:03,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:05,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:07,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:09,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:12,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:15,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:17,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:21,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:59:21,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 749 [2023-09-01 02:59:21,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 268 transitions, 3125 flow. Second operand has 17 states, 17 states have (on average 245.41176470588235) internal successors, (4172), 17 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:21,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:21,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 749 [2023-09-01 02:59:21,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:49,254 INFO L130 PetriNetUnfolder]: 97041/135064 cut-off events. [2023-09-01 02:59:49,254 INFO L131 PetriNetUnfolder]: For 414625/427428 co-relation queries the response was YES. [2023-09-01 02:59:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599911 conditions, 135064 events. 97041/135064 cut-off events. For 414625/427428 co-relation queries the response was YES. Maximal size of possible extension queue 5851. Compared 1039406 event pairs, 28043 based on Foata normal form. 10854/109710 useless extension candidates. Maximal degree in co-relation 599829. Up to 57160 conditions per place. [2023-09-01 02:59:51,848 INFO L137 encePairwiseOnDemand]: 740/749 looper letters, 356 selfloop transitions, 91 changer transitions 0/462 dead transitions. [2023-09-01 02:59:51,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 462 transitions, 5013 flow [2023-09-01 02:59:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:59:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:59:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3381 transitions. [2023-09-01 02:59:51,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472322070452912 [2023-09-01 02:59:51,853 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3381 transitions. [2023-09-01 02:59:51,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3381 transitions. [2023-09-01 02:59:51,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:51,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3381 transitions. [2023-09-01 02:59:51,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 260.0769230769231) internal successors, (3381), 13 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:51,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 749.0) internal successors, (10486), 14 states have internal predecessors, (10486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:51,863 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 749.0) internal successors, (10486), 14 states have internal predecessors, (10486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:51,863 INFO L175 Difference]: Start difference. First operand has 245 places, 268 transitions, 3125 flow. Second operand 13 states and 3381 transitions. [2023-09-01 02:59:51,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 462 transitions, 5013 flow [2023-09-01 02:59:58,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 462 transitions, 4885 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-09-01 02:59:58,195 INFO L231 Difference]: Finished difference. Result has 256 places, 270 transitions, 3316 flow [2023-09-01 02:59:58,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=749, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3316, PETRI_PLACES=256, PETRI_TRANSITIONS=270} [2023-09-01 02:59:58,196 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 193 predicate places. [2023-09-01 02:59:58,196 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 270 transitions, 3316 flow [2023-09-01 02:59:58,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 245.41176470588235) internal successors, (4172), 17 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:59:58,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:58,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:58,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:58,397 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 02:59:58,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1333743955, now seen corresponding path program 1 times [2023-09-01 02:59:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:59:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52997574] [2023-09-01 02:59:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:58,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:59:58,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:59:58,399 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:59:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 02:59:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 02:59:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:58,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:59:58,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 02:59:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:59:58,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 02:59:58,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:59:58,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 02:59:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:59:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 02:59:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:59:59,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:59:59,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52997574] [2023-09-01 02:59:59,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52997574] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:59,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:59:59,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:59:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225497063] [2023-09-01 02:59:59,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:59:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:59:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:59:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:00:01,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:04,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:06,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:08,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:11,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:13,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:16,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:18,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:20,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:22,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:25,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:27,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:30,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 03:00:33,500 WARN L539 Checker$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] [2023-09-01 03:00:35,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:37,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:00:39,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 03:00:39,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 749 [2023-09-01 03:00:39,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 270 transitions, 3316 flow. Second operand has 12 states, 12 states have (on average 257.3333333333333) internal successors, (3088), 12 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:00:39,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:39,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 749 [2023-09-01 03:00:39,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:55,515 WARN L222 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 40 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:01:11,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:01:15,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 03:01:21,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15