./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.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/unroll-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --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 04:11:40,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:11:40,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:11:40,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:11:40,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:11:40,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:11:40,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:11:40,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:11:40,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:11:40,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:11:40,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:11:40,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:11:40,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:11:40,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:11:40,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:11:40,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:11:40,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:11:40,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:11:40,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:11:40,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:11:40,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:11:40,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:11:40,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:11:40,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:11:40,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:11:40,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:11:40,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:11:40,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:11:40,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:11:40,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:11:40,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:11:40,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:11:40,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:11:40,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:11:40,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:11:40,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:11:40,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:11:40,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:11:40,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:11:40,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:11:40,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:11:40,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:11:40,718 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:11:40,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:11:40,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:11:40,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:11:40,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:11:40,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:11:40,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:11:40,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:11:40,721 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:11:40,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:11:40,721 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:11:40,722 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:11:40,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:11:40,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:11:40,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:11:40,723 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:11:40,723 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:11:40,723 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:11:40,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:11:40,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:11:40,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:11:40,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:11:40,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:11:40,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:11:40,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:11:40,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:40,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:11:40,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:11:40,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:11:40,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:11:40,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:11:40,727 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:11:40,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:11:40,727 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:11:40,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:11:41,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:11:41,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:11:41,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:11:41,068 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:11:41,069 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:11:41,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-09-01 04:11:42,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:11:42,500 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:11:42,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-09-01 04:11:42,517 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1a26565/9bb9e20361c54d4e8f6ab32cd5537fab/FLAGa50baba92 [2023-09-01 04:11:42,538 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1a26565/9bb9e20361c54d4e8f6ab32cd5537fab [2023-09-01 04:11:42,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:11:42,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:11:42,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:42,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:11:42,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:11:42,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:42" (1/1) ... [2023-09-01 04:11:42,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bfe8cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:42, skipping insertion in model container [2023-09-01 04:11:42,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:42" (1/1) ... [2023-09-01 04:11:42,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:11:42,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:42,756 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/unroll-2.wvr.c[2428,2441] [2023-09-01 04:11:42,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:42,782 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 04:11:42,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@723f90b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:42, skipping insertion in model container [2023-09-01 04:11:42,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:42,786 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:11:42,788 INFO L158 Benchmark]: Toolchain (without parser) took 244.04ms. Allocated memory is still 67.1MB. Free memory was 38.6MB in the beginning and 28.8MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:11:42,789 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 67.1MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:11:42,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.99ms. Allocated memory is still 67.1MB. Free memory was 38.4MB in the beginning and 28.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 04:11:42,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 67.1MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.99ms. Allocated memory is still 67.1MB. Free memory was 38.4MB in the beginning and 28.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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/unroll-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --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 04:11:44,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:11:44,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:11:44,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:11:44,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:11:44,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:11:44,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:11:44,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:11:44,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:11:44,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:11:44,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:11:44,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:11:44,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:11:44,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:11:44,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:11:44,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:11:44,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:11:44,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:11:44,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:11:44,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:11:44,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:11:44,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:11:44,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:11:44,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:11:44,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:11:44,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:11:44,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:11:44,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:11:44,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:11:44,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:11:44,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:11:44,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:11:44,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:11:44,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:11:44,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:11:44,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:11:44,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:11:44,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:11:44,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:11:44,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:11:44,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:11:44,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:11:44,806 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:11:44,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:11:44,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:11:44,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:11:44,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:11:44,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:11:44,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:11:44,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:11:44,809 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:11:44,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:11:44,810 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:11:44,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:11:44,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:11:44,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:11:44,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:11:44,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:11:44,812 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:11:44,812 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:11:44,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:11:44,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:11:44,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:11:44,813 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:11:44,813 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:11:44,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:11:44,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:11:44,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:11:44,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:11:44,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:44,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:11:44,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:11:44,815 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:11:44,815 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:11:44,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:11:44,815 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:11:44,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:11:44,816 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:11:44,816 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:11:44,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:11:45,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:11:45,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:11:45,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:11:45,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:11:45,155 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:11:45,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-09-01 04:11:46,286 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:11:46,526 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:11:46,527 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-09-01 04:11:46,535 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac726f210/0af71d45a7b74571a1f88c87141c9bc7/FLAG99b47a0d7 [2023-09-01 04:11:46,553 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac726f210/0af71d45a7b74571a1f88c87141c9bc7 [2023-09-01 04:11:46,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:11:46,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:11:46,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:46,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:11:46,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:11:46,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f67225a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46, skipping insertion in model container [2023-09-01 04:11:46,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:11:46,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:46,770 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/unroll-2.wvr.c[2428,2441] [2023-09-01 04:11:46,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:46,789 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:11:46,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:11:46,803 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/unroll-2.wvr.c[2428,2441] [2023-09-01 04:11:46,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:46,810 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:11:46,828 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/unroll-2.wvr.c[2428,2441] [2023-09-01 04:11:46,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:11:46,845 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:11:46,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46 WrapperNode [2023-09-01 04:11:46,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:11:46,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:11:46,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:11:46,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:11:46,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,889 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 135 [2023-09-01 04:11:46,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:11:46,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:11:46,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:11:46,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:11:46,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:11:46,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:11:46,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:11:46,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:11:46,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (1/1) ... [2023-09-01 04:11:46,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:11:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:11:46,954 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 04:11:46,958 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 04:11:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:11:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:11:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:11:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:11:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:11:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:11:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:11:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:11:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:11:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:11:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:11:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:11:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:11:46,988 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 04:11:47,074 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:11:47,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:11:47,529 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:11:47,539 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:11:47,542 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:11:47,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:11:47 BoogieIcfgContainer [2023-09-01 04:11:47,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:11:47,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:11:47,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:11:47,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:11:47,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:11:46" (1/3) ... [2023-09-01 04:11:47,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213fced3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:11:47, skipping insertion in model container [2023-09-01 04:11:47,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:11:46" (2/3) ... [2023-09-01 04:11:47,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213fced3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:11:47, skipping insertion in model container [2023-09-01 04:11:47,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:11:47" (3/3) ... [2023-09-01 04:11:47,554 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-09-01 04:11:47,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:11:47,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 04:11:47,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:11:47,702 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:11:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 175 transitions, 366 flow [2023-09-01 04:11:47,833 INFO L130 PetriNetUnfolder]: 14/173 cut-off events. [2023-09-01 04:11:47,833 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:11:47,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 14/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 229 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:11:47,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 175 transitions, 366 flow [2023-09-01 04:11:47,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 169 transitions, 350 flow [2023-09-01 04:11:47,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:11:47,865 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 169 transitions, 350 flow [2023-09-01 04:11:47,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 169 transitions, 350 flow [2023-09-01 04:11:47,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 169 transitions, 350 flow [2023-09-01 04:11:47,927 INFO L130 PetriNetUnfolder]: 14/169 cut-off events. [2023-09-01 04:11:47,928 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:11:47,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:11:47,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 2778 [2023-09-01 04:12:00,357 INFO L134 LiptonReduction]: Checked pairs total: 2716 [2023-09-01 04:12:00,357 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 04:12:00,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:12:00,375 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;@1d63ac94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:12:00,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-09-01 04:12:00,379 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:12:00,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:12:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:00,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:00,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:00,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash 21819, now seen corresponding path program 1 times [2023-09-01 04:12:00,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:00,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60460006] [2023-09-01 04:12:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:00,396 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 04:12:00,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:00,404 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 04:12:00,438 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 04:12:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:12:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:00,594 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:12:00,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:12:00,614 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 04:12:00,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:00,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:00,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60460006] [2023-09-01 04:12:00,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60460006] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:00,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:00,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381880345] [2023-09-01 04:12:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:00,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:00,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:00,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-09-01 04:12:00,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:00,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:00,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-09-01 04:12:00,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:01,015 INFO L130 PetriNetUnfolder]: 398/569 cut-off events. [2023-09-01 04:12:01,015 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:12:01,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 569 events. 398/569 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2309 event pairs, 184 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 997. Up to 564 conditions per place. [2023-09-01 04:12:01,020 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 04:12:01,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 132 flow [2023-09-01 04:12:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-09-01 04:12:01,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558960074280409 [2023-09-01 04:12:01,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-09-01 04:12:01,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-09-01 04:12:01,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:01,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-09-01 04:12:01,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 04:12:01,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:01,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:01,049 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 491 transitions. [2023-09-01 04:12:01,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 132 flow [2023-09-01 04:12:01,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:12:01,053 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-09-01 04:12:01,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-09-01 04:12:01,058 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-09-01 04:12:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-09-01 04:12:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:01,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:01,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:01,077 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 04:12:01,269 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 04:12:01,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:01,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-09-01 04:12:01,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105957081] [2023-09-01 04:12:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:01,272 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 04:12:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:01,273 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 04:12:01,277 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 04:12:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:12:01,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:01,362 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 04:12:01,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:01,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105957081] [2023-09-01 04:12:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105957081] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:01,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607318340] [2023-09-01 04:12:01,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:01,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 359 [2023-09-01 04:12:01,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 04:12:01,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:01,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 359 [2023-09-01 04:12:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:01,613 INFO L130 PetriNetUnfolder]: 398/571 cut-off events. [2023-09-01 04:12:01,613 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:01,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 571 events. 398/571 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2323 event pairs, 184 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 1141. Up to 565 conditions per place. [2023-09-01 04:12:01,617 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-09-01 04:12:01,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 134 flow [2023-09-01 04:12:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-09-01 04:12:01,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46332404828226553 [2023-09-01 04:12:01,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-09-01 04:12:01,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-09-01 04:12:01,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:01,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-09-01 04:12:01,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 04:12:01,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:01,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:01,625 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 499 transitions. [2023-09-01 04:12:01,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 134 flow [2023-09-01 04:12:01,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:01,627 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 83 flow [2023-09-01 04:12:01,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-09-01 04:12:01,627 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 04:12:01,628 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 83 flow [2023-09-01 04:12:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 04:12:01,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:01,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:12:01,640 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 04:12:01,837 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 04:12:01,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:01,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 21820, now seen corresponding path program 1 times [2023-09-01 04:12:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572673931] [2023-09-01 04:12:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:01,839 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 04:12:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:01,840 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 04:12:01,844 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 04:12:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:01,957 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:01,978 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 04:12:01,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:01,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572673931] [2023-09-01 04:12:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572673931] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:01,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:01,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876050428] [2023-09-01 04:12:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:01,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:01,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:02,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-09-01 04:12:02,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:02,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:02,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-09-01 04:12:02,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:02,339 INFO L130 PetriNetUnfolder]: 398/570 cut-off events. [2023-09-01 04:12:02,339 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:02,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 570 events. 398/570 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 2285 event pairs, 184 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 1145. Up to 565 conditions per place. [2023-09-01 04:12:02,343 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 28 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-09-01 04:12:02,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 143 flow [2023-09-01 04:12:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-09-01 04:12:02,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45496750232126276 [2023-09-01 04:12:02,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-09-01 04:12:02,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-09-01 04:12:02,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:02,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-09-01 04:12:02,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 04:12:02,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:02,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:02,350 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 83 flow. Second operand 3 states and 490 transitions. [2023-09-01 04:12:02,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 143 flow [2023-09-01 04:12:02,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:02,352 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 87 flow [2023-09-01 04:12:02,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-09-01 04:12:02,352 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-09-01 04:12:02,353 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 87 flow [2023-09-01 04:12:02,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:02,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:02,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:02,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:02,563 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 04:12:02,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:02,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash 678212, now seen corresponding path program 1 times [2023-09-01 04:12:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341454372] [2023-09-01 04:12:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:02,564 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 04:12:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:02,568 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 04:12:02,569 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 04:12:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:12:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:12:02,718 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-09-01 04:12:02,719 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 14 treesize of output 26 [2023-09-01 04:12:02,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 04:12:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:02,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:02,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341454372] [2023-09-01 04:12:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341454372] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:02,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:02,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230097484] [2023-09-01 04:12:02,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:02,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:02,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:02,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:03,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-09-01 04:12:03,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 04:12:03,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:03,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-09-01 04:12:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:03,183 INFO L130 PetriNetUnfolder]: 304/445 cut-off events. [2023-09-01 04:12:03,183 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:03,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 445 events. 304/445 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 1695 event pairs, 139 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 895. Up to 440 conditions per place. [2023-09-01 04:12:03,186 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 04:12:03,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 137 flow [2023-09-01 04:12:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-09-01 04:12:03,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531104921077066 [2023-09-01 04:12:03,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-09-01 04:12:03,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-09-01 04:12:03,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:03,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-09-01 04:12:03,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 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 04:12:03,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:03,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:03,192 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 87 flow. Second operand 3 states and 488 transitions. [2023-09-01 04:12:03,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 137 flow [2023-09-01 04:12:03,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:03,193 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 79 flow [2023-09-01 04:12:03,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 04:12:03,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 04:12:03,194 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 79 flow [2023-09-01 04:12:03,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 04:12:03,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:03,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:03,208 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 04:12:03,409 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 04:12:03,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:03,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash 678210, now seen corresponding path program 1 times [2023-09-01 04:12:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:03,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590526563] [2023-09-01 04:12:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:03,411 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 04:12:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:03,413 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 04:12:03,417 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 04:12:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:03,505 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:12:03,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-09-01 04:12:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:03,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:03,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:03,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590526563] [2023-09-01 04:12:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590526563] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:03,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:03,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242731505] [2023-09-01 04:12:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:03,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-09-01 04:12:03,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 04:12:03,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:03,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-09-01 04:12:03,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:03,822 INFO L130 PetriNetUnfolder]: 210/320 cut-off events. [2023-09-01 04:12:03,822 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:12:03,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 320 events. 210/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1157 event pairs, 94 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 643. Up to 315 conditions per place. [2023-09-01 04:12:03,827 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 04:12:03,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 125 flow [2023-09-01 04:12:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-09-01 04:12:03,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45125348189415043 [2023-09-01 04:12:03,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-09-01 04:12:03,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-09-01 04:12:03,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:03,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-09-01 04:12:03,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 04:12:03,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:03,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:03,834 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 79 flow. Second operand 3 states and 486 transitions. [2023-09-01 04:12:03,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 125 flow [2023-09-01 04:12:03,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:03,838 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 74 flow [2023-09-01 04:12:03,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-09-01 04:12:03,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-09-01 04:12:03,840 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 74 flow [2023-09-01 04:12:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 04:12:03,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:03,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:12:03,850 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 04:12:04,050 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 04:12:04,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:04,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash 678152, now seen corresponding path program 1 times [2023-09-01 04:12:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057631746] [2023-09-01 04:12:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:04,052 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 04:12:04,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:04,053 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 04:12:04,055 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 04:12:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:12:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:04,174 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:04,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:04,237 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 04:12:04,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:04,428 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 04:12:04,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057631746] [2023-09-01 04:12:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057631746] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:04,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:12:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656274525] [2023-09-01 04:12:04,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:04,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:12:04,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:04,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:12:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:12:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-09-01 04:12:05,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 04:12:05,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:05,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-09-01 04:12:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:05,605 INFO L130 PetriNetUnfolder]: 412/632 cut-off events. [2023-09-01 04:12:05,605 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:12:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 632 events. 412/632 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2826 event pairs, 187 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 1273. Up to 312 conditions per place. [2023-09-01 04:12:05,608 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-09-01 04:12:05,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 250 flow [2023-09-01 04:12:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:12:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:12:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 944 transitions. [2023-09-01 04:12:05,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382544103992572 [2023-09-01 04:12:05,612 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 944 transitions. [2023-09-01 04:12:05,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 944 transitions. [2023-09-01 04:12:05,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:05,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 944 transitions. [2023-09-01 04:12:05,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 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 04:12:05,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 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 04:12:05,618 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 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 04:12:05,619 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 74 flow. Second operand 6 states and 944 transitions. [2023-09-01 04:12:05,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 250 flow [2023-09-01 04:12:05,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:05,620 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 131 flow [2023-09-01 04:12:05,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-09-01 04:12:05,621 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 04:12:05,621 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 131 flow [2023-09-01 04:12:05,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 04:12:05,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:05,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:12:05,631 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 04:12:05,828 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 04:12:05,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:05,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 651775888, now seen corresponding path program 1 times [2023-09-01 04:12:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128150162] [2023-09-01 04:12:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:05,830 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 04:12:05,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:05,831 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 04:12:05,832 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 04:12:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:12:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:05,962 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:05,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:06,151 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 04:12:06,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:12:06,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128150162] [2023-09-01 04:12:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128150162] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:06,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:12:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680118982] [2023-09-01 04:12:06,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:12:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:12:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:06,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-09-01 04:12:06,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 131 flow. Second operand has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 04:12:06,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:06,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-09-01 04:12:06,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:07,181 INFO L130 PetriNetUnfolder]: 378/576 cut-off events. [2023-09-01 04:12:07,181 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:12:07,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 576 events. 378/576 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2512 event pairs, 171 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 1180. Up to 284 conditions per place. [2023-09-01 04:12:07,184 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-09-01 04:12:07,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 275 flow [2023-09-01 04:12:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:12:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:12:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-09-01 04:12:07,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284122562674095 [2023-09-01 04:12:07,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-09-01 04:12:07,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-09-01 04:12:07,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:07,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-09-01 04:12:07,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:07,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 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 04:12:07,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 0 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 04:12:07,192 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 131 flow. Second operand 5 states and 769 transitions. [2023-09-01 04:12:07,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 275 flow [2023-09-01 04:12:07,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 263 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:07,195 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 121 flow [2023-09-01 04:12:07,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-09-01 04:12:07,196 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-09-01 04:12:07,196 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 121 flow [2023-09-01 04:12:07,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 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 04:12:07,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:07,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:12:07,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-09-01 04:12:07,406 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 04:12:07,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:07,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 651775886, now seen corresponding path program 1 times [2023-09-01 04:12:07,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:07,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704533049] [2023-09-01 04:12:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:07,407 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 04:12:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:07,408 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 04:12:07,409 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 04:12:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:12:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:07,519 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 04:12:07,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-09-01 04:12:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:07,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:07,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:07,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704533049] [2023-09-01 04:12:07,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704533049] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:07,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:07,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:07,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727748868] [2023-09-01 04:12:07,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:07,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:07,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:07,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-09-01 04:12:07,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 04:12:07,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:07,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-09-01 04:12:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:07,790 INFO L130 PetriNetUnfolder]: 353/529 cut-off events. [2023-09-01 04:12:07,790 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 04:12:07,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 529 events. 353/529 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2226 event pairs, 156 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 1084. Up to 519 conditions per place. [2023-09-01 04:12:07,795 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 04:12:07,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 29 transitions, 171 flow [2023-09-01 04:12:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-09-01 04:12:07,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391829155060353 [2023-09-01 04:12:07,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-09-01 04:12:07,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-09-01 04:12:07,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:07,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-09-01 04:12:07,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 04:12:07,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:07,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:07,802 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 121 flow. Second operand 3 states and 473 transitions. [2023-09-01 04:12:07,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 29 transitions, 171 flow [2023-09-01 04:12:07,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:12:07,807 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 114 flow [2023-09-01 04:12:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-09-01 04:12:07,809 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-09-01 04:12:07,809 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 114 flow [2023-09-01 04:12:07,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 04:12:07,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:07,810 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:12:07,824 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 04:12:08,022 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 04:12:08,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:08,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1270290372, now seen corresponding path program 2 times [2023-09-01 04:12:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189201114] [2023-09-01 04:12:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:08,024 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 04:12:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:08,025 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 04:12:08,027 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 04:12:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:12:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:12:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:08,163 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:08,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:08,288 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 04:12:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:08,799 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 04:12:08,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:08,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189201114] [2023-09-01 04:12:08,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189201114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:08,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:08,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:12:08,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094435924] [2023-09-01 04:12:08,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:08,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:12:08,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:12:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:12:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-09-01 04:12:11,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 114 flow. Second operand has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 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 04:12:11,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:11,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-09-01 04:12:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:14,040 INFO L130 PetriNetUnfolder]: 1505/2282 cut-off events. [2023-09-01 04:12:14,040 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-09-01 04:12:14,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 2282 events. 1505/2282 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12074 event pairs, 694 based on Foata normal form. 6/917 useless extension candidates. Maximal degree in co-relation 4606. Up to 256 conditions per place. [2023-09-01 04:12:14,049 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 164 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2023-09-01 04:12:14,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 178 transitions, 838 flow [2023-09-01 04:12:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:12:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:12:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1970 transitions. [2023-09-01 04:12:14,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457288765088208 [2023-09-01 04:12:14,056 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1970 transitions. [2023-09-01 04:12:14,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1970 transitions. [2023-09-01 04:12:14,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:14,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1970 transitions. [2023-09-01 04:12:14,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.16666666666666) internal successors, (1970), 12 states have internal predecessors, (1970), 0 states have call successors, (0), 0 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 04:12:14,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 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 04:12:14,067 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 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 04:12:14,067 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 114 flow. Second operand 12 states and 1970 transitions. [2023-09-01 04:12:14,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 178 transitions, 838 flow [2023-09-01 04:12:14,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 178 transitions, 837 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:14,071 INFO L231 Difference]: Finished difference. Result has 57 places, 36 transitions, 199 flow [2023-09-01 04:12:14,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2023-09-01 04:12:14,071 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-09-01 04:12:14,072 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 199 flow [2023-09-01 04:12:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 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 04:12:14,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:14,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:12:14,081 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 (10)] Ended with exit code 0 [2023-09-01 04:12:14,281 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 04:12:14,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:14,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789535, now seen corresponding path program 1 times [2023-09-01 04:12:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822175282] [2023-09-01 04:12:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:14,283 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 04:12:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:14,284 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 04:12:14,287 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 04:12:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:12:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:14,406 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 04:12:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:14,524 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 35 treesize of output 31 [2023-09-01 04:12:14,592 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 04:12:14,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822175282] [2023-09-01 04:12:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822175282] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:14,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:14,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:12:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848344651] [2023-09-01 04:12:14,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:12:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:12:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:15,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-09-01 04:12:15,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 04:12:15,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:15,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-09-01 04:12:15,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:16,709 INFO L130 PetriNetUnfolder]: 1973/3137 cut-off events. [2023-09-01 04:12:16,709 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 04:12:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 3137 events. 1973/3137 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19303 event pairs, 441 based on Foata normal form. 0/1333 useless extension candidates. Maximal degree in co-relation 6382. Up to 1936 conditions per place. [2023-09-01 04:12:16,726 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 56 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-09-01 04:12:16,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 408 flow [2023-09-01 04:12:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:12:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:12:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1072 transitions. [2023-09-01 04:12:16,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265817747711898 [2023-09-01 04:12:16,731 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1072 transitions. [2023-09-01 04:12:16,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1072 transitions. [2023-09-01 04:12:16,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:16,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1072 transitions. [2023-09-01 04:12:16,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 04:12:16,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 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 04:12:16,739 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 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 04:12:16,739 INFO L175 Difference]: Start difference. First operand has 57 places, 36 transitions, 199 flow. Second operand 7 states and 1072 transitions. [2023-09-01 04:12:16,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 408 flow [2023-09-01 04:12:16,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 395 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 04:12:16,745 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 231 flow [2023-09-01 04:12:16,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-09-01 04:12:16,747 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-09-01 04:12:16,747 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 231 flow [2023-09-01 04:12:16,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 04:12:16,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:16,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:12:16,767 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 04:12:16,957 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 04:12:16,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:16,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789536, now seen corresponding path program 1 times [2023-09-01 04:12:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:16,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630489213] [2023-09-01 04:12:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:16,958 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 04:12:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:16,959 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 04:12:16,960 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 04:12:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:12:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:17,039 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:12:17,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:12:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:17,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:17,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:17,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630489213] [2023-09-01 04:12:17,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630489213] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:17,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:17,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:12:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664503072] [2023-09-01 04:12:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:17,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 359 [2023-09-01 04:12:17,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 04:12:17,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:17,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 359 [2023-09-01 04:12:17,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:17,533 INFO L130 PetriNetUnfolder]: 1181/1967 cut-off events. [2023-09-01 04:12:17,533 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2023-09-01 04:12:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4547 conditions, 1967 events. 1181/1967 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11534 event pairs, 657 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 4519. Up to 1918 conditions per place. [2023-09-01 04:12:17,546 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 29 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-09-01 04:12:17,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 37 transitions, 297 flow [2023-09-01 04:12:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-09-01 04:12:17,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41852367688022285 [2023-09-01 04:12:17,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-09-01 04:12:17,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-09-01 04:12:17,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:17,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-09-01 04:12:17,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 04:12:17,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:17,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:17,553 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 231 flow. Second operand 4 states and 601 transitions. [2023-09-01 04:12:17,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 37 transitions, 297 flow [2023-09-01 04:12:17,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 37 transitions, 283 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:17,556 INFO L231 Difference]: Finished difference. Result has 60 places, 37 transitions, 225 flow [2023-09-01 04:12:17,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=60, PETRI_TRANSITIONS=37} [2023-09-01 04:12:17,557 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-09-01 04:12:17,557 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 37 transitions, 225 flow [2023-09-01 04:12:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 04:12:17,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:17,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:17,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-09-01 04:12:17,765 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 04:12:17,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:17,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash -708769242, now seen corresponding path program 1 times [2023-09-01 04:12:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817775372] [2023-09-01 04:12:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:17,766 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 04:12:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:17,767 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 04:12:17,768 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 04:12:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:12:17,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:17,906 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:17,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:18,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:18,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817775372] [2023-09-01 04:12:18,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817775372] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:18,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:18,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:12:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183741297] [2023-09-01 04:12:18,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:18,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:12:18,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:12:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:23,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 359 [2023-09-01 04:12:23,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 37 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:23,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:23,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 359 [2023-09-01 04:12:23,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:25,725 INFO L130 PetriNetUnfolder]: 937/1615 cut-off events. [2023-09-01 04:12:25,725 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2023-09-01 04:12:25,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1615 events. 937/1615 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9337 event pairs, 523 based on Foata normal form. 21/1137 useless extension candidates. Maximal degree in co-relation 3706. Up to 1249 conditions per place. [2023-09-01 04:12:25,735 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 49 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-09-01 04:12:25,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 410 flow [2023-09-01 04:12:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:12:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:12:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1352 transitions. [2023-09-01 04:12:25,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418446301454658 [2023-09-01 04:12:25,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1352 transitions. [2023-09-01 04:12:25,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1352 transitions. [2023-09-01 04:12:25,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:25,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1352 transitions. [2023-09-01 04:12:25,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.22222222222223) internal successors, (1352), 9 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 04:12:25,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 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 04:12:25,748 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 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 04:12:25,748 INFO L175 Difference]: Start difference. First operand has 60 places, 37 transitions, 225 flow. Second operand 9 states and 1352 transitions. [2023-09-01 04:12:25,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 410 flow [2023-09-01 04:12:25,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:25,752 INFO L231 Difference]: Finished difference. Result has 68 places, 37 transitions, 255 flow [2023-09-01 04:12:25,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=255, PETRI_PLACES=68, PETRI_TRANSITIONS=37} [2023-09-01 04:12:25,753 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-09-01 04:12:25,753 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 37 transitions, 255 flow [2023-09-01 04:12:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:25,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:25,754 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:25,764 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 04:12:25,963 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 04:12:25,963 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:25,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 486334298, now seen corresponding path program 2 times [2023-09-01 04:12:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:25,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248868711] [2023-09-01 04:12:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:25,964 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 04:12:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:25,965 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 04:12:25,966 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 04:12:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:12:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:26,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:12:26,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:26,092 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:26,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 04:12:26,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:26,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248868711] [2023-09-01 04:12:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248868711] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:26,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:26,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:12:26,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239735049] [2023-09-01 04:12:26,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:26,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:26,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 359 [2023-09-01 04:12:26,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 37 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 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 04:12:26,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:26,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 359 [2023-09-01 04:12:26,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:26,668 INFO L130 PetriNetUnfolder]: 533/995 cut-off events. [2023-09-01 04:12:26,668 INFO L131 PetriNetUnfolder]: For 968/968 co-relation queries the response was YES. [2023-09-01 04:12:26,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2310 conditions, 995 events. 533/995 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5525 event pairs, 279 based on Foata normal form. 144/896 useless extension candidates. Maximal degree in co-relation 2279. Up to 946 conditions per place. [2023-09-01 04:12:26,678 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-09-01 04:12:26,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-09-01 04:12:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-09-01 04:12:26,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431058495821727 [2023-09-01 04:12:26,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-09-01 04:12:26,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-09-01 04:12:26,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:26,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-09-01 04:12:26,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 04:12:26,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:26,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:26,685 INFO L175 Difference]: Start difference. First operand has 68 places, 37 transitions, 255 flow. Second operand 4 states and 619 transitions. [2023-09-01 04:12:26,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-09-01 04:12:26,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-09-01 04:12:26,687 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-09-01 04:12:26,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-09-01 04:12:26,688 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-09-01 04:12:26,688 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-09-01 04:12:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 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 04:12:26,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:26,689 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:12:26,700 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 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:26,897 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 04:12:26,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:26,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1476326588, now seen corresponding path program 3 times [2023-09-01 04:12:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:26,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455218456] [2023-09-01 04:12:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:12:26,898 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 04:12:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:26,899 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 04:12:26,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:12:27,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:12:27,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:12:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:27,119 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:12:27,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:12:27,482 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 04:12:27,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:29,356 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 04:12:29,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455218456] [2023-09-01 04:12:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455218456] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:29,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:12:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946733431] [2023-09-01 04:12:29,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:12:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:12:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:12:39,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 359 [2023-09-01 04:12:39,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 04:12:39,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:39,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 359 [2023-09-01 04:12:39,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:53,935 INFO L130 PetriNetUnfolder]: 1201/2275 cut-off events. [2023-09-01 04:12:53,936 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-09-01 04:12:53,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 2275 events. 1201/2275 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13375 event pairs, 631 based on Foata normal form. 12/1860 useless extension candidates. Maximal degree in co-relation 5004. Up to 504 conditions per place. [2023-09-01 04:12:53,944 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-09-01 04:12:53,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-09-01 04:12:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:12:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:12:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3887 transitions. [2023-09-01 04:12:53,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45113741875580315 [2023-09-01 04:12:53,954 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3887 transitions. [2023-09-01 04:12:53,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3887 transitions. [2023-09-01 04:12:53,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:53,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3887 transitions. [2023-09-01 04:12:53,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 161.95833333333334) internal successors, (3887), 24 states have internal predecessors, (3887), 0 states have call successors, (0), 0 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 04:12:53,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 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 04:12:53,974 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 359.0) internal successors, (8975), 25 states have internal predecessors, (8975), 0 states have call successors, (0), 0 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 04:12:53,974 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 3887 transitions. [2023-09-01 04:12:53,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-09-01 04:12:53,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:12:53,981 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-09-01 04:12:53,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-09-01 04:12:53,981 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-09-01 04:12:53,981 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-09-01 04:12:53,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 04:12:53,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:53,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:53,996 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 04:12:54,193 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 04:12:54,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:54,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1572933441, now seen corresponding path program 1 times [2023-09-01 04:12:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:54,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336704732] [2023-09-01 04:12:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:54,194 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 04:12:54,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:54,196 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 04:12:54,198 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 04:12:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:12:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:54,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:54,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:54,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336704732] [2023-09-01 04:12:54,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336704732] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:54,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:54,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:12:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300806844] [2023-09-01 04:12:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:54,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:12:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:12:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:12:54,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 359 [2023-09-01 04:12:54,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 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 04:12:54,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:54,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 359 [2023-09-01 04:12:54,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:54,792 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-09-01 04:12:54,793 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-09-01 04:12:54,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 16734 event pairs, 273 based on Foata normal form. 21/2189 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-09-01 04:12:54,805 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-09-01 04:12:54,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-09-01 04:12:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:12:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:12:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-09-01 04:12:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596100278551532 [2023-09-01 04:12:54,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-09-01 04:12:54,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-09-01 04:12:54,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:54,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-09-01 04:12:54,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 04:12:54,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:54,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 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 04:12:54,811 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 495 transitions. [2023-09-01 04:12:54,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-09-01 04:12:54,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 04:12:54,817 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-09-01 04:12:54,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-09-01 04:12:54,817 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2023-09-01 04:12:54,818 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-09-01 04:12:54,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 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 04:12:54,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:54,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:55,027 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 04:12:55,028 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:55,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash -7085512, now seen corresponding path program 1 times [2023-09-01 04:12:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172744788] [2023-09-01 04:12:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:55,029 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 04:12:55,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:55,030 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 04:12:55,031 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 04:12:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:12:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:55,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:55,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:55,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172744788] [2023-09-01 04:12:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172744788] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:55,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:55,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:12:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287357974] [2023-09-01 04:12:55,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:55,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-09-01 04:12:55,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 04:12:55,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:55,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-09-01 04:12:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:55,650 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-09-01 04:12:55,651 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-09-01 04:12:55,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2827 events. 1463/2827 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17894 event pairs, 420 based on Foata normal form. 160/2907 useless extension candidates. Maximal degree in co-relation 7091. Up to 1608 conditions per place. [2023-09-01 04:12:55,663 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 56 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2023-09-01 04:12:55,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 521 flow [2023-09-01 04:12:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-09-01 04:12:55,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-09-01 04:12:55,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-09-01 04:12:55,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-09-01 04:12:55,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:55,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-09-01 04:12:55,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:55,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:55,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:55,669 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 4 states and 641 transitions. [2023-09-01 04:12:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 521 flow [2023-09-01 04:12:55,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 65 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:55,674 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 375 flow [2023-09-01 04:12:55,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2023-09-01 04:12:55,675 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-09-01 04:12:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 375 flow [2023-09-01 04:12:55,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 04:12:55,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:55,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:55,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:55,891 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 04:12:55,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:55,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 807173980, now seen corresponding path program 2 times [2023-09-01 04:12:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334192451] [2023-09-01 04:12:55,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:55,892 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 04:12:55,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:55,893 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 04:12:55,895 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 04:12:55,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:12:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:12:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:56,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:56,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:56,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334192451] [2023-09-01 04:12:56,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334192451] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:12:56,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:12:56,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-09-01 04:12:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451646655] [2023-09-01 04:12:56,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:56,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:56,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:56,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:12:56,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-09-01 04:12:56,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 04:12:56,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:56,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-09-01 04:12:56,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:56,630 INFO L130 PetriNetUnfolder]: 1663/3127 cut-off events. [2023-09-01 04:12:56,630 INFO L131 PetriNetUnfolder]: For 3078/3102 co-relation queries the response was YES. [2023-09-01 04:12:56,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 3127 events. 1663/3127 cut-off events. For 3078/3102 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18854 event pairs, 460 based on Foata normal form. 82/3109 useless extension candidates. Maximal degree in co-relation 9491. Up to 2080 conditions per place. [2023-09-01 04:12:56,649 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-09-01 04:12:56,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 559 flow [2023-09-01 04:12:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-09-01 04:12:56,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637883008356544 [2023-09-01 04:12:56,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-09-01 04:12:56,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-09-01 04:12:56,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:56,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-09-01 04:12:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:56,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:56,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:56,658 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 375 flow. Second operand 4 states and 641 transitions. [2023-09-01 04:12:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 559 flow [2023-09-01 04:12:56,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 539 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:56,665 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 407 flow [2023-09-01 04:12:56,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-09-01 04:12:56,666 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-09-01 04:12:56,666 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 407 flow [2023-09-01 04:12:56,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 04:12:56,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:56,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:56,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:12:56,876 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 04:12:56,877 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:56,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1719858430, now seen corresponding path program 1 times [2023-09-01 04:12:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:56,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602636515] [2023-09-01 04:12:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:12:56,877 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 04:12:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:56,878 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 04:12:56,879 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 04:12:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:12:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:12:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:56,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:12:56,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602636515] [2023-09-01 04:12:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602636515] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:12:56,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:12:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:12:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652197521] [2023-09-01 04:12:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:12:57,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-09-01 04:12:57,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 04:12:57,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:57,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-09-01 04:12:57,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:57,440 INFO L130 PetriNetUnfolder]: 1703/3387 cut-off events. [2023-09-01 04:12:57,440 INFO L131 PetriNetUnfolder]: For 5079/5319 co-relation queries the response was YES. [2023-09-01 04:12:57,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 3387 events. 1703/3387 cut-off events. For 5079/5319 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21989 event pairs, 620 based on Foata normal form. 200/3467 useless extension candidates. Maximal degree in co-relation 10191. Up to 2228 conditions per place. [2023-09-01 04:12:57,458 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 63 selfloop transitions, 4 changer transitions 2/71 dead transitions. [2023-09-01 04:12:57,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 71 transitions, 620 flow [2023-09-01 04:12:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:12:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:12:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-09-01 04:12:57,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-09-01 04:12:57,462 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-09-01 04:12:57,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-09-01 04:12:57,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:57,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-09-01 04:12:57,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 04:12:57,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:57,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:12:57,466 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 407 flow. Second operand 4 states and 635 transitions. [2023-09-01 04:12:57,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 71 transitions, 620 flow [2023-09-01 04:12:57,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 71 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:57,485 INFO L231 Difference]: Finished difference. Result has 93 places, 56 transitions, 435 flow [2023-09-01 04:12:57,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=93, PETRI_TRANSITIONS=56} [2023-09-01 04:12:57,487 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-09-01 04:12:57,487 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 56 transitions, 435 flow [2023-09-01 04:12:57,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 04:12:57,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:57,499 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 04:12:57,699 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 04:12:57,699 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:57,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1254785704, now seen corresponding path program 2 times [2023-09-01 04:12:57,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:57,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814800428] [2023-09-01 04:12:57,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:12:57,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:12:57,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:57,701 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 04:12:57,703 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 04:12:57,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:12:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:12:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:57,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:57,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:57,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814800428] [2023-09-01 04:12:57,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814800428] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:12:57,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:12:57,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 04:12:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469212778] [2023-09-01 04:12:57,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:12:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:12:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:12:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:12:57,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 359 [2023-09-01 04:12:57,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 56 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:57,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:57,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 359 [2023-09-01 04:12:57,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:12:59,019 INFO L130 PetriNetUnfolder]: 2783/5327 cut-off events. [2023-09-01 04:12:59,019 INFO L131 PetriNetUnfolder]: For 10653/11413 co-relation queries the response was YES. [2023-09-01 04:12:59,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 5327 events. 2783/5327 cut-off events. For 10653/11413 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 37001 event pairs, 540 based on Foata normal form. 1200/6527 useless extension candidates. Maximal degree in co-relation 19411. Up to 1841 conditions per place. [2023-09-01 04:12:59,053 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 77 selfloop transitions, 15 changer transitions 7/100 dead transitions. [2023-09-01 04:12:59,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 847 flow [2023-09-01 04:12:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:12:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:12:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1121 transitions. [2023-09-01 04:12:59,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460803820135296 [2023-09-01 04:12:59,057 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1121 transitions. [2023-09-01 04:12:59,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1121 transitions. [2023-09-01 04:12:59,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:12:59,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1121 transitions. [2023-09-01 04:12:59,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.14285714285714) internal successors, (1121), 7 states have internal predecessors, (1121), 0 states have call successors, (0), 0 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 04:12:59,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 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 04:12:59,062 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 0 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 04:12:59,062 INFO L175 Difference]: Start difference. First operand has 93 places, 56 transitions, 435 flow. Second operand 7 states and 1121 transitions. [2023-09-01 04:12:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 847 flow [2023-09-01 04:12:59,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 808 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-09-01 04:12:59,111 INFO L231 Difference]: Finished difference. Result has 101 places, 62 transitions, 527 flow [2023-09-01 04:12:59,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=101, PETRI_TRANSITIONS=62} [2023-09-01 04:12:59,112 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-09-01 04:12:59,112 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 62 transitions, 527 flow [2023-09-01 04:12:59,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:59,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:12:59,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:12:59,124 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 04:12:59,322 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 04:12:59,322 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:12:59,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:12:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash -671136611, now seen corresponding path program 3 times [2023-09-01 04:12:59,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:12:59,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100389115] [2023-09-01 04:12:59,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:12:59,323 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 04:12:59,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:12:59,325 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 04:12:59,325 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 04:12:59,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:12:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:12:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:12:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:12:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:12:59,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:12:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:12:59,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:12:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100389115] [2023-09-01 04:12:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100389115] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:12:59,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:12:59,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-09-01 04:12:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740981381] [2023-09-01 04:12:59,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:12:59,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:12:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:12:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:12:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:12:59,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 359 [2023-09-01 04:12:59,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 62 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:12:59,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:12:59,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 359 [2023-09-01 04:12:59,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:00,488 INFO L130 PetriNetUnfolder]: 3363/6187 cut-off events. [2023-09-01 04:13:00,488 INFO L131 PetriNetUnfolder]: For 14737/15137 co-relation queries the response was YES. [2023-09-01 04:13:00,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23977 conditions, 6187 events. 3363/6187 cut-off events. For 14737/15137 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 39209 event pairs, 760 based on Foata normal form. 440/6567 useless extension candidates. Maximal degree in co-relation 23931. Up to 5120 conditions per place. [2023-09-01 04:13:00,527 INFO L137 encePairwiseOnDemand]: 355/359 looper letters, 67 selfloop transitions, 6 changer transitions 1/76 dead transitions. [2023-09-01 04:13:00,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 746 flow [2023-09-01 04:13:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:13:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:13:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-09-01 04:13:00,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44220055710306405 [2023-09-01 04:13:00,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-09-01 04:13:00,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-09-01 04:13:00,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:00,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-09-01 04:13:00,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 04:13:00,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:13:00,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 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 04:13:00,533 INFO L175 Difference]: Start difference. First operand has 101 places, 62 transitions, 527 flow. Second operand 4 states and 635 transitions. [2023-09-01 04:13:00,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 746 flow [2023-09-01 04:13:00,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 76 transitions, 710 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 04:13:00,563 INFO L231 Difference]: Finished difference. Result has 103 places, 64 transitions, 535 flow [2023-09-01 04:13:00,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=103, PETRI_TRANSITIONS=64} [2023-09-01 04:13:00,564 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-09-01 04:13:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 64 transitions, 535 flow [2023-09-01 04:13:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:00,580 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 04:13:00,775 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 04:13:00,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:13:00,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 322299853, now seen corresponding path program 4 times [2023-09-01 04:13:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:00,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814108533] [2023-09-01 04:13:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:13:00,776 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 04:13:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:00,777 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 04:13:00,779 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 04:13:00,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:13:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:13:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:00,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:01,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:01,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814108533] [2023-09-01 04:13:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814108533] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:13:01,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:13:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-09-01 04:13:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256950697] [2023-09-01 04:13:01,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:13:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 04:13:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 04:13:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-09-01 04:13:01,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-09-01 04:13:01,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 64 transitions, 535 flow. Second operand has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 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 04:13:01,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:01,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-09-01 04:13:01,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:03,870 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 04:13:05,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:07,994 WARN L539 Checker$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 04:13:09,763 INFO L130 PetriNetUnfolder]: 6023/10827 cut-off events. [2023-09-01 04:13:09,763 INFO L131 PetriNetUnfolder]: For 29071/29071 co-relation queries the response was YES. [2023-09-01 04:13:09,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42799 conditions, 10827 events. 6023/10827 cut-off events. For 29071/29071 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 74097 event pairs, 1540 based on Foata normal form. 400/11227 useless extension candidates. Maximal degree in co-relation 42751. Up to 6028 conditions per place. [2023-09-01 04:13:09,828 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 83 selfloop transitions, 55 changer transitions 4/142 dead transitions. [2023-09-01 04:13:09,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1255 flow [2023-09-01 04:13:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 04:13:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 04:13:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2007 transitions. [2023-09-01 04:13:09,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004071137775873 [2023-09-01 04:13:09,832 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2007 transitions. [2023-09-01 04:13:09,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2007 transitions. [2023-09-01 04:13:09,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:09,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2007 transitions. [2023-09-01 04:13:09,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 154.3846153846154) internal successors, (2007), 13 states have internal predecessors, (2007), 0 states have call successors, (0), 0 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 04:13:09,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 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 04:13:09,840 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 359.0) internal successors, (5026), 14 states have internal predecessors, (5026), 0 states have call successors, (0), 0 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 04:13:09,840 INFO L175 Difference]: Start difference. First operand has 103 places, 64 transitions, 535 flow. Second operand 13 states and 2007 transitions. [2023-09-01 04:13:09,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1255 flow [2023-09-01 04:13:09,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 142 transitions, 1236 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 04:13:09,920 INFO L231 Difference]: Finished difference. Result has 120 places, 109 transitions, 1042 flow [2023-09-01 04:13:09,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1042, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2023-09-01 04:13:09,921 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-09-01 04:13:09,921 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 1042 flow [2023-09-01 04:13:09,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.36363636363637) internal successors, (1654), 11 states have internal predecessors, (1654), 0 states have call successors, (0), 0 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 04:13:09,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:09,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:09,935 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 04:13:10,132 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 04:13:10,133 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:13:10,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash -996186711, now seen corresponding path program 5 times [2023-09-01 04:13:10,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:10,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302509061] [2023-09-01 04:13:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:13:10,134 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 04:13:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:10,135 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 04:13:10,137 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 04:13:10,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:13:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:13:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 04:13:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:10,527 INFO L321 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2023-09-01 04:13:10,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 178 treesize of output 90 [2023-09-01 04:13:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:13:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:11,061 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-09-01 04:13:11,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 299 treesize of output 140 [2023-09-01 04:13:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:13:12,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302509061] [2023-09-01 04:13:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302509061] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:13:12,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:13:12,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:13:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223118537] [2023-09-01 04:13:12,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:13:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:13:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:13:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:13:13,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 359 [2023-09-01 04:13:13,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 1042 flow. Second operand has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 04:13:13,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:13,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 359 [2023-09-01 04:13:13,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:16,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:18,381 WARN L539 Checker$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 04:13:20,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:22,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:24,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:26,489 WARN L539 Checker$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 04:13:28,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:13:30,512 WARN L539 Checker$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 04:13:32,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:13:34,594 WARN L539 Checker$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 04:13:36,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:13:38,613 WARN L539 Checker$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 04:13:40,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:13:42,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:13:44,156 INFO L130 PetriNetUnfolder]: 5781/10463 cut-off events. [2023-09-01 04:13:44,157 INFO L131 PetriNetUnfolder]: For 48840/49849 co-relation queries the response was YES. [2023-09-01 04:13:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51713 conditions, 10463 events. 5781/10463 cut-off events. For 48840/49849 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 72821 event pairs, 786 based on Foata normal form. 896/11251 useless extension candidates. Maximal degree in co-relation 51659. Up to 9070 conditions per place. [2023-09-01 04:13:44,244 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 116 selfloop transitions, 27 changer transitions 113/263 dead transitions. [2023-09-01 04:13:44,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 263 transitions, 2775 flow [2023-09-01 04:13:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 04:13:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 04:13:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2046 transitions. [2023-09-01 04:13:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40708316752885 [2023-09-01 04:13:44,247 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2046 transitions. [2023-09-01 04:13:44,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2046 transitions. [2023-09-01 04:13:44,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:44,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2046 transitions. [2023-09-01 04:13:44,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 states have internal predecessors, (2046), 0 states have call successors, (0), 0 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 04:13:44,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 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 04:13:44,253 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 359.0) internal successors, (5385), 15 states have internal predecessors, (5385), 0 states have call successors, (0), 0 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 04:13:44,253 INFO L175 Difference]: Start difference. First operand has 120 places, 109 transitions, 1042 flow. Second operand 14 states and 2046 transitions. [2023-09-01 04:13:44,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 263 transitions, 2775 flow [2023-09-01 04:13:44,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 263 transitions, 2456 flow, removed 133 selfloop flow, removed 4 redundant places. [2023-09-01 04:13:44,459 INFO L231 Difference]: Finished difference. Result has 136 places, 121 transitions, 1113 flow [2023-09-01 04:13:44,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1113, PETRI_PLACES=136, PETRI_TRANSITIONS=121} [2023-09-01 04:13:44,461 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-09-01 04:13:44,461 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 121 transitions, 1113 flow [2023-09-01 04:13:44,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.5) internal successors, (1710), 12 states have internal predecessors, (1710), 0 states have call successors, (0), 0 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 04:13:44,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:44,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:13:44,476 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 04:13:44,673 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 04:13:44,673 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:13:44,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1938222630, now seen corresponding path program 1 times [2023-09-01 04:13:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103588472] [2023-09-01 04:13:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:44,674 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 04:13:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:44,675 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 04:13:44,676 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 04:13:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:44,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 04:13:44,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:45,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:13:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,256 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:13:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:13:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:13:45,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:13:45,363 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-09-01 04:13:45,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-09-01 04:13:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:13:45,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:13:46,579 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-09-01 04:13:46,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-09-01 04:15:14,481 WARN L222 SmtUtils]: Spent 58.86s on a formula simplification. DAG size of input: 1496 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:15:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:15,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:15,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103588472] [2023-09-01 04:15:15,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103588472] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:15,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:15,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:15:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771039889] [2023-09-01 04:15:15,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:15,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:15:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:15:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2023-09-01 04:15:24,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-09-01 04:15:24,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 121 transitions, 1113 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 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 04:15:24,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:24,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-09-01 04:15:24,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:29,671 INFO L130 PetriNetUnfolder]: 5407/9817 cut-off events. [2023-09-01 04:15:29,671 INFO L131 PetriNetUnfolder]: For 44977/45987 co-relation queries the response was YES. [2023-09-01 04:15:29,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47985 conditions, 9817 events. 5407/9817 cut-off events. For 44977/45987 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 68281 event pairs, 742 based on Foata normal form. 759/10437 useless extension candidates. Maximal degree in co-relation 47924. Up to 8950 conditions per place. [2023-09-01 04:15:29,758 INFO L137 encePairwiseOnDemand]: 351/359 looper letters, 103 selfloop transitions, 13 changer transitions 46/169 dead transitions. [2023-09-01 04:15:29,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1785 flow [2023-09-01 04:15:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:15:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:15:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1207 transitions. [2023-09-01 04:15:29,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362116991643454 [2023-09-01 04:15:29,760 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1207 transitions. [2023-09-01 04:15:29,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1207 transitions. [2023-09-01 04:15:29,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:29,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1207 transitions. [2023-09-01 04:15:29,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 04:15:29,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 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 04:15:29,764 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 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 04:15:29,764 INFO L175 Difference]: Start difference. First operand has 136 places, 121 transitions, 1113 flow. Second operand 10 states and 1207 transitions. [2023-09-01 04:15:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1785 flow [2023-09-01 04:15:30,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 169 transitions, 1711 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-09-01 04:15:30,099 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 962 flow [2023-09-01 04:15:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=962, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2023-09-01 04:15:30,099 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 100 predicate places. [2023-09-01 04:15:30,100 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 962 flow [2023-09-01 04:15:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 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 04:15:30,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:30,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:30,110 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 04:15:30,305 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 04:15:30,305 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:15:30,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1043230612, now seen corresponding path program 2 times [2023-09-01 04:15:30,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:30,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960856760] [2023-09-01 04:15:30,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:15:30,306 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 04:15:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:30,307 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 04:15:30,308 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 04:15:30,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:15:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 04:15:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:15:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:15:31,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:15:31,057 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:15:31,059 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:15:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:15:31,066 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:15:31,312 INFO L321 Elim1Store]: treesize reduction 348, result has 6.7 percent of original size [2023-09-01 04:15:31,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 217 treesize of output 111 [2023-09-01 04:15:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:15:31,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:33,449 INFO L321 Elim1Store]: treesize reduction 566, result has 15.9 percent of original size [2023-09-01 04:15:33,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 201 [2023-09-01 04:16:52,088 WARN L222 SmtUtils]: Spent 24.03s on a formula simplification. DAG size of input: 1448 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:16:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:16:53,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:16:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960856760] [2023-09-01 04:16:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960856760] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:16:53,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:16:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:16:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205719965] [2023-09-01 04:16:53,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:16:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:16:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:16:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:16:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=95, Unknown=4, NotChecked=0, Total=132 [2023-09-01 04:17:01,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 359 [2023-09-01 04:17:01,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 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 04:17:01,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:17:01,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 359 [2023-09-01 04:17:01,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:17:06,411 INFO L130 PetriNetUnfolder]: 5285/9612 cut-off events. [2023-09-01 04:17:06,412 INFO L131 PetriNetUnfolder]: For 46304/47284 co-relation queries the response was YES. [2023-09-01 04:17:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46596 conditions, 9612 events. 5285/9612 cut-off events. For 46304/47284 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 66550 event pairs, 914 based on Foata normal form. 728/10203 useless extension candidates. Maximal degree in co-relation 46535. Up to 8950 conditions per place. [2023-09-01 04:17:06,474 INFO L137 encePairwiseOnDemand]: 352/359 looper letters, 90 selfloop transitions, 9 changer transitions 23/129 dead transitions. [2023-09-01 04:17:06,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 129 transitions, 1335 flow [2023-09-01 04:17:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:17:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:17:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1197 transitions. [2023-09-01 04:17:06,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3334261838440111 [2023-09-01 04:17:06,476 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1197 transitions. [2023-09-01 04:17:06,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1197 transitions. [2023-09-01 04:17:06,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:17:06,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1197 transitions. [2023-09-01 04:17:06,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.7) internal successors, (1197), 10 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 04:17:06,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 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 04:17:06,481 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 0 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 04:17:06,481 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 962 flow. Second operand 10 states and 1197 transitions. [2023-09-01 04:17:06,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 129 transitions, 1335 flow [2023-09-01 04:17:06,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 129 transitions, 1294 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-09-01 04:17:06,655 INFO L231 Difference]: Finished difference. Result has 136 places, 103 transitions, 887 flow [2023-09-01 04:17:06,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=887, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2023-09-01 04:17:06,655 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-09-01 04:17:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 887 flow [2023-09-01 04:17:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 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 04:17:06,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:17:06,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:17:06,664 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 04:17:06,856 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 04:17:06,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:17:06,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:17:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -450113443, now seen corresponding path program 6 times [2023-09-01 04:17:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:17:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264283919] [2023-09-01 04:17:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 04:17:06,857 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 04:17:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:17:06,858 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 04:17:06,859 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 04:17:06,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 04:17:06,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:17:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:17:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:17:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:17:07,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:17:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:17:07,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:17:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264283919] [2023-09-01 04:17:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264283919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:17:07,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:17:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 04:17:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503735681] [2023-09-01 04:17:07,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:17:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:17:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:17:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:17:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:17:08,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 359 [2023-09-01 04:17:08,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 887 flow. Second operand has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 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 04:17:08,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:17:08,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 359 [2023-09-01 04:17:08,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:17:12,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:17:14,110 WARN L539 Checker$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 04:17:16,538 INFO L130 PetriNetUnfolder]: 6444/11465 cut-off events. [2023-09-01 04:17:16,539 INFO L131 PetriNetUnfolder]: For 45322/45322 co-relation queries the response was YES. [2023-09-01 04:17:16,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53018 conditions, 11465 events. 6444/11465 cut-off events. For 45322/45322 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 78474 event pairs, 1672 based on Foata normal form. 380/11845 useless extension candidates. Maximal degree in co-relation 52959. Up to 7039 conditions per place. [2023-09-01 04:17:16,614 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 111 selfloop transitions, 47 changer transitions 2/160 dead transitions. [2023-09-01 04:17:16,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1582 flow [2023-09-01 04:17:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:17:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:17:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1852 transitions. [2023-09-01 04:17:16,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298978644382544 [2023-09-01 04:17:16,618 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1852 transitions. [2023-09-01 04:17:16,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1852 transitions. [2023-09-01 04:17:16,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:17:16,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1852 transitions. [2023-09-01 04:17:16,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.33333333333334) internal successors, (1852), 12 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 04:17:16,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 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 04:17:16,623 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 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 04:17:16,623 INFO L175 Difference]: Start difference. First operand has 136 places, 103 transitions, 887 flow. Second operand 12 states and 1852 transitions. [2023-09-01 04:17:16,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1582 flow [2023-09-01 04:17:16,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 160 transitions, 1458 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-09-01 04:17:16,864 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1128 flow [2023-09-01 04:17:16,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1128, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2023-09-01 04:17:16,864 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2023-09-01 04:17:16,865 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1128 flow [2023-09-01 04:17:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.91666666666666) internal successors, (1799), 12 states have internal predecessors, (1799), 0 states have call successors, (0), 0 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 04:17:16,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:17:16,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:17:16,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 04:17:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:17:17,066 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:17:17,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:17:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1533238626, now seen corresponding path program 3 times [2023-09-01 04:17:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:17:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971301042] [2023-09-01 04:17:17,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:17:17,067 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 04:17:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:17:17,068 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:17:17,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 04:17:17,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:17:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:17:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:17:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:17:18,024 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-09-01 04:17:18,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-09-01 04:17:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:17:19,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:17:29,110 WARN L222 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 471 DAG size of output: 108 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 04:17:29,111 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-09-01 04:17:29,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-09-01 04:19:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:19:54,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:19:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971301042] [2023-09-01 04:19:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971301042] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:19:54,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:19:54,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 04:19:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564509727] [2023-09-01 04:19:54,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:19:54,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:19:54,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:19:54,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:19:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2023-09-01 04:19:55,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 359 [2023-09-01 04:19:55,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1128 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 04:19:55,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:19:55,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 359 [2023-09-01 04:19:55,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:19:58,555 INFO L130 PetriNetUnfolder]: 7812/13935 cut-off events. [2023-09-01 04:19:58,555 INFO L131 PetriNetUnfolder]: For 52580/53169 co-relation queries the response was YES. [2023-09-01 04:19:58,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69013 conditions, 13935 events. 7812/13935 cut-off events. For 52580/53169 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 100466 event pairs, 608 based on Foata normal form. 627/14410 useless extension candidates. Maximal degree in co-relation 68954. Up to 7753 conditions per place. [2023-09-01 04:19:58,650 INFO L137 encePairwiseOnDemand]: 354/359 looper letters, 120 selfloop transitions, 55 changer transitions 1/183 dead transitions. [2023-09-01 04:19:58,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 1887 flow [2023-09-01 04:19:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 04:19:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 04:19:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-09-01 04:19:58,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889275766016713 [2023-09-01 04:19:58,654 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-09-01 04:19:58,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-09-01 04:19:58,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:19:58,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-09-01 04:19:58,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 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 04:19:58,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 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 04:19:58,656 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 0 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 04:19:58,656 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1128 flow. Second operand 8 states and 1117 transitions. [2023-09-01 04:19:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 1887 flow [2023-09-01 04:19:59,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 1775 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-09-01 04:19:59,160 INFO L231 Difference]: Finished difference. Result has 140 places, 148 transitions, 1474 flow [2023-09-01 04:19:59,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2023-09-01 04:19:59,161 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2023-09-01 04:19:59,161 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 1474 flow [2023-09-01 04:19:59,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 04:19:59,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:19:59,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:19:59,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 04:19:59,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:19:59,362 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 04:19:59,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:19:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 95170566, now seen corresponding path program 4 times [2023-09-01 04:19:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:19:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001973878] [2023-09-01 04:19:59,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:19:59,362 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 04:19:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:19:59,363 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:19:59,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 04:19:59,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:19:59,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:19:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:19:59,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:20:00,132 INFO L321 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-09-01 04:20:00,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-09-01 04:20:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:20:01,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:20:11,516 WARN L222 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 471 DAG size of output: 108 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 04:20:11,517 INFO L321 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-09-01 04:20:11,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-09-01 04:23:24,399 WARN L222 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 5630 DAG size of output: 5630 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:25:21,162 WARN L222 SmtUtils]: Spent 20.37s on a formula simplification. DAG size of input: 5919 DAG size of output: 6066 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15