./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/chl-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:36:36,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:36:36,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:36:36,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:36:36,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:36:36,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:36:36,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:36:36,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:36:36,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:36:36,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:36:36,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:36:36,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:36:36,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:36:36,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:36:36,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:36:36,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:36:36,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:36:36,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:36:36,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:36:36,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:36:36,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:36:36,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:36:36,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:36:36,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:36:36,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:36:36,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:36:36,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:36:36,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:36:36,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:36:36,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:36:36,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:36:36,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:36:36,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:36:36,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:36:36,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:36:36,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:36:36,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:36:36,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:36:36,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:36:36,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:36:36,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:36:36,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:36:36,805 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:36:36,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:36:36,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:36:36,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:36:36,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:36:36,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:36:36,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:36:36,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:36:36,808 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:36:36,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:36:36,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:36:36,809 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:36:36,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:36:36,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:36:36,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:36:36,810 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:36:36,810 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:36:36,810 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:36:36,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:36:36,811 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:36:36,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:36:36,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:36:36,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:36:36,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:36:36,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:36:36,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:36:36,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:36:36,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:36:36,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:36:36,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:36:36,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:36:36,813 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:36:36,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:36:36,813 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:36:36,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:36:37,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:36:37,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:36:37,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:36:37,136 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:36:37,137 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:36:37,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-29 22:36:38,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:36:38,549 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:36:38,550 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-29 22:36:38,558 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8390ec8/ef488e849b5940edb3724cd6a6c400c3/FLAG8d054429d [2023-08-29 22:36:38,577 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8390ec8/ef488e849b5940edb3724cd6a6c400c3 [2023-08-29 22:36:38,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:36:38,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:36:38,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:36:38,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:36:38,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:36:38,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:36:38" (1/1) ... [2023-08-29 22:36:38,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2877e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:38, skipping insertion in model container [2023-08-29 22:36:38,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:36:38" (1/1) ... [2023-08-29 22:36:38,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:36:38,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:36:38,754 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/chl-array-int-symm.wvr.c[2482,2495] [2023-08-29 22:36:38,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:36:38,792 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:36:38,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78af535a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:38, skipping insertion in model container [2023-08-29 22:36:38,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:36:38,794 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:36:38,796 INFO L158 Benchmark]: Toolchain (without parser) took 213.16ms. Allocated memory is still 83.9MB. Free memory was 56.1MB in the beginning and 46.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:36:38,797 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 34.3MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:36:38,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.45ms. Allocated memory is still 83.9MB. Free memory was 55.9MB in the beginning and 46.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:36:38,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 34.3MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.45ms. Allocated memory is still 83.9MB. Free memory was 55.9MB in the beginning and 46.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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/chl-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:36:40,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:36:40,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:36:40,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:36:40,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:36:40,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:36:40,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:36:40,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:36:40,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:36:40,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:36:40,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:36:40,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:36:40,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:36:40,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:36:40,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:36:40,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:36:40,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:36:40,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:36:40,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:36:40,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:36:40,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:36:40,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:36:40,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:36:40,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:36:40,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:36:40,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:36:40,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:36:40,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:36:40,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:36:40,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:36:40,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:36:40,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:36:40,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:36:40,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:36:40,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:36:40,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:36:40,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:36:40,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:36:40,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:36:40,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:36:40,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:36:40,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:36:40,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:36:40,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:36:40,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:36:40,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:36:40,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:36:40,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:36:40,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:36:40,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:36:40,585 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:36:40,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:36:40,586 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:36:40,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:36:40,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:36:40,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:36:40,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:36:40,587 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:36:40,587 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:36:40,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:36:40,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:36:40,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:36:40,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:36:40,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:36:40,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:36:40,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:36:40,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:36:40,590 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:36:40,590 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:36:40,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:36:40,591 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:36:40,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:36:40,591 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:36:40,591 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:36:40,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:36:40,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:36:40,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:36:40,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:36:40,914 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:36:40,914 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:36:40,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-29 22:36:42,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:36:42,271 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:36:42,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-08-29 22:36:42,279 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de874c643/0d95ae8fb9264620b98c8d3e15891222/FLAGfcae72504 [2023-08-29 22:36:42,289 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de874c643/0d95ae8fb9264620b98c8d3e15891222 [2023-08-29 22:36:42,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:36:42,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:36:42,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:36:42,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:36:42,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:36:42,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3212aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42, skipping insertion in model container [2023-08-29 22:36:42,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:36:42,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:36:42,494 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/chl-array-int-symm.wvr.c[2482,2495] [2023-08-29 22:36:42,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:36:42,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:36:42,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:36:42,559 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/chl-array-int-symm.wvr.c[2482,2495] [2023-08-29 22:36:42,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:36:42,579 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:36:42,606 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/chl-array-int-symm.wvr.c[2482,2495] [2023-08-29 22:36:42,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:36:42,633 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:36:42,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42 WrapperNode [2023-08-29 22:36:42,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:36:42,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:36:42,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:36:42,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:36:42,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,690 INFO L138 Inliner]: procedures = 27, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-08-29 22:36:42,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:36:42,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:36:42,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:36:42,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:36:42,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:36:42,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:36:42,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:36:42,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:36:42,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (1/1) ... [2023-08-29 22:36:42,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:36:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:36:42,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:36:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:36:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:36:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:36:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:36:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:36:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:36:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:36:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:36:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:36:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:36:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:36:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:36:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:36:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:36:42,850 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:36:42,969 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:36:42,971 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:36:43,480 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:36:43,488 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:36:43,489 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:36:43,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:36:43 BoogieIcfgContainer [2023-08-29 22:36:43,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:36:43,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:36:43,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:36:43,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:36:43,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:36:42" (1/3) ... [2023-08-29 22:36:43,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2736680c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:36:43, skipping insertion in model container [2023-08-29 22:36:43,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:36:42" (2/3) ... [2023-08-29 22:36:43,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2736680c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:36:43, skipping insertion in model container [2023-08-29 22:36:43,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:36:43" (3/3) ... [2023-08-29 22:36:43,500 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-08-29 22:36:43,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:36:43,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-29 22:36:43,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:36:43,638 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:36:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 257 transitions, 530 flow [2023-08-29 22:36:43,801 INFO L130 PetriNetUnfolder]: 21/255 cut-off events. [2023-08-29 22:36:43,801 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:36:43,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 255 events. 21/255 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 483 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-29 22:36:43,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 257 transitions, 530 flow [2023-08-29 22:36:43,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2023-08-29 22:36:43,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:36:43,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2023-08-29 22:36:43,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2023-08-29 22:36:43,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2023-08-29 22:36:43,891 INFO L130 PetriNetUnfolder]: 21/251 cut-off events. [2023-08-29 22:36:43,892 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:36:43,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-29 22:36:43,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 7548 [2023-08-29 22:37:06,289 INFO L134 LiptonReduction]: Checked pairs total: 10913 [2023-08-29 22:37:06,290 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-08-29 22:37:06,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:37:06,314 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;@1de55f8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:37:06,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-29 22:37:06,316 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:37:06,316 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:37:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:06,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:37:06,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:06,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash 33261, now seen corresponding path program 1 times [2023-08-29 22:37:06,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:06,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965895877] [2023-08-29 22:37:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:06,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:06,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:06,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:37:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:37:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:06,509 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:37:06,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:37:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:06,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:06,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965895877] [2023-08-29 22:37:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965895877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:06,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:06,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:06,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441190973] [2023-08-29 22:37:06,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:06,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:06,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-08-29 22:37:06,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:06,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:06,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-08-29 22:37:06,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:07,141 INFO L130 PetriNetUnfolder]: 805/1290 cut-off events. [2023-08-29 22:37:07,142 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-29 22:37:07,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1290 events. 805/1290 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 6156 event pairs, 679 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2472. Up to 1290 conditions per place. [2023-08-29 22:37:07,149 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 22:37:07,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 192 flow [2023-08-29 22:37:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-29 22:37:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-08-29 22:37:07,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-29 22:37:07,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-29 22:37:07,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:07,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-29 22:37:07,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:07,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:07,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:07,181 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 733 transitions. [2023-08-29 22:37:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 192 flow [2023-08-29 22:37:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:37:07,186 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 96 flow [2023-08-29 22:37:07,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-29 22:37:07,190 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-29 22:37:07,191 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 96 flow [2023-08-29 22:37:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:07,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:37:07,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:07,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:07,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash 33262, now seen corresponding path program 1 times [2023-08-29 22:37:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:07,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777573839] [2023-08-29 22:37:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:07,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:07,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:07,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:37:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:07,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:07,543 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:37:07,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:37:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:07,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:07,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777573839] [2023-08-29 22:37:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777573839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:07,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:07,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:07,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120693623] [2023-08-29 22:37:07,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:07,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:07,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:07,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 563 [2023-08-29 22:37:07,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:07,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:07,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 563 [2023-08-29 22:37:07,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:08,495 INFO L130 PetriNetUnfolder]: 1609/2577 cut-off events. [2023-08-29 22:37:08,495 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:37:08,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 2577 events. 1609/2577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 13992 event pairs, 1358 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 5182. Up to 1291 conditions per place. [2023-08-29 22:37:08,506 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-29 22:37:08,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 87 transitions, 358 flow [2023-08-29 22:37:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-29 22:37:08,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45589105979869743 [2023-08-29 22:37:08,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-29 22:37:08,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-29 22:37:08,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:08,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-29 22:37:08,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:08,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:08,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:08,517 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 96 flow. Second operand 3 states and 770 transitions. [2023-08-29 22:37:08,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 87 transitions, 358 flow [2023-08-29 22:37:08,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 87 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:08,520 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 127 flow [2023-08-29 22:37:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-29 22:37:08,521 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-29 22:37:08,521 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 127 flow [2023-08-29 22:37:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:08,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:08,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:37:08,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:08,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:08,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:08,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1035598, now seen corresponding path program 1 times [2023-08-29 22:37:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:08,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125687425] [2023-08-29 22:37:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:08,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:08,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:08,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:37:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:08,844 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-29 22:37:08,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 22:37:08,889 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:37:08,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:37:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:08,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:08,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:08,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125687425] [2023-08-29 22:37:08,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125687425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:08,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:08,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004203376] [2023-08-29 22:37:08,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:09,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-08-29 22:37:09,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:09,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:09,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-08-29 22:37:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:09,583 INFO L130 PetriNetUnfolder]: 1203/1973 cut-off events. [2023-08-29 22:37:09,584 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:37:09,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 1973 events. 1203/1973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 10465 event pairs, 1008 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3985. Up to 1973 conditions per place. [2023-08-29 22:37:09,594 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-29 22:37:09,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-08-29 22:37:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-29 22:37:09,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351687388987567 [2023-08-29 22:37:09,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-29 22:37:09,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-29 22:37:09,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:09,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-29 22:37:09,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:09,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:09,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:09,604 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 127 flow. Second operand 3 states and 735 transitions. [2023-08-29 22:37:09,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-08-29 22:37:09,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:37:09,607 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2023-08-29 22:37:09,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-29 22:37:09,611 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-29 22:37:09,611 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2023-08-29 22:37:09,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:09,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:09,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:37:09,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:09,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:09,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1033353, now seen corresponding path program 1 times [2023-08-29 22:37:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695291109] [2023-08-29 22:37:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:09,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:09,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:09,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:37:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:37:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:09,954 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:37:09,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:37:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:10,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:37:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:10,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:10,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695291109] [2023-08-29 22:37:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695291109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:37:10,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:37:10,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:37:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214224382] [2023-08-29 22:37:10,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:37:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:37:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:37:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:37:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-29 22:37:11,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:11,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:11,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-29 22:37:11,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:12,405 INFO L130 PetriNetUnfolder]: 1810/2968 cut-off events. [2023-08-29 22:37:12,405 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 22:37:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 2968 events. 1810/2968 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 16600 event pairs, 1512 based on Foata normal form. 0/1096 useless extension candidates. Maximal degree in co-relation 5996. Up to 988 conditions per place. [2023-08-29 22:37:12,419 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 116 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2023-08-29 22:37:12,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 133 transitions, 583 flow [2023-08-29 22:37:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:37:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:37:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1441 transitions. [2023-08-29 22:37:12,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265837773830669 [2023-08-29 22:37:12,424 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1441 transitions. [2023-08-29 22:37:12,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1441 transitions. [2023-08-29 22:37:12,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:12,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1441 transitions. [2023-08-29 22:37:12,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.16666666666666) internal successors, (1441), 6 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:12,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:12,435 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:12,435 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 6 states and 1441 transitions. [2023-08-29 22:37:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 133 transitions, 583 flow [2023-08-29 22:37:12,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:12,438 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 245 flow [2023-08-29 22:37:12,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-29 22:37:12,439 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-29 22:37:12,440 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 245 flow [2023-08-29 22:37:12,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:12,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:12,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:37:12,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-29 22:37:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:12,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1035600, now seen corresponding path program 1 times [2023-08-29 22:37:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396466000] [2023-08-29 22:37:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:12,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:37:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:37:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:12,766 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:37:12,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 22:37:12,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 22:37:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:12,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:37:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:12,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:12,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396466000] [2023-08-29 22:37:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396466000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:37:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942044238] [2023-08-29 22:37:12,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:37:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:37:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:37:13,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 563 [2023-08-29 22:37:13,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:13,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:13,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 563 [2023-08-29 22:37:13,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:13,592 INFO L130 PetriNetUnfolder]: 1199/2060 cut-off events. [2023-08-29 22:37:13,593 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 22:37:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 2060 events. 1199/2060 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 11637 event pairs, 987 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 4220. Up to 2060 conditions per place. [2023-08-29 22:37:13,601 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-29 22:37:13,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 335 flow [2023-08-29 22:37:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-29 22:37:13,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339846062759029 [2023-08-29 22:37:13,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-29 22:37:13,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-29 22:37:13,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:13,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-29 22:37:13,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:13,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:13,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:13,611 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 245 flow. Second operand 3 states and 733 transitions. [2023-08-29 22:37:13,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 335 flow [2023-08-29 22:37:13,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 316 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:13,613 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 208 flow [2023-08-29 22:37:13,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-08-29 22:37:13,614 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-29 22:37:13,614 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 208 flow [2023-08-29 22:37:13,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:13,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:13,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:37:13,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:13,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:13,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 995233483, now seen corresponding path program 1 times [2023-08-29 22:37:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:13,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058904925] [2023-08-29 22:37:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:13,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:13,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:13,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:13,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:37:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:37:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:13,921 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:37:13,921 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-29 22:37:13,949 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:37:13,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:37:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:13,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:13,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:13,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058904925] [2023-08-29 22:37:13,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058904925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:13,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:13,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:37:13,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769683481] [2023-08-29 22:37:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:37:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:37:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:37:14,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-08-29 22:37:14,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:14,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:14,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-08-29 22:37:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:14,461 INFO L130 PetriNetUnfolder]: 1133/1931 cut-off events. [2023-08-29 22:37:14,462 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 22:37:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 1931 events. 1133/1931 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10720 event pairs, 930 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 3952. Up to 1931 conditions per place. [2023-08-29 22:37:14,470 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 22:37:14,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 310 flow [2023-08-29 22:37:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-29 22:37:14,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42924807578448787 [2023-08-29 22:37:14,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-29 22:37:14,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-29 22:37:14,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:14,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-29 22:37:14,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:14,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:14,478 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 208 flow. Second operand 3 states and 725 transitions. [2023-08-29 22:37:14,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 310 flow [2023-08-29 22:37:14,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:14,481 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 205 flow [2023-08-29 22:37:14,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-29 22:37:14,482 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-29 22:37:14,482 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 205 flow [2023-08-29 22:37:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:14,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:14,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:37:14,491 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 (7)] Ended with exit code 0 [2023-08-29 22:37:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:14,691 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:14,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 995233484, now seen corresponding path program 1 times [2023-08-29 22:37:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:14,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135472445] [2023-08-29 22:37:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:14,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:14,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:37:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:14,809 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 22:37:14,810 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 22:37:14,820 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 39 treesize of output 37 [2023-08-29 22:37:14,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:14,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:37:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:14,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:14,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135472445] [2023-08-29 22:37:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135472445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:37:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688422217] [2023-08-29 22:37:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:37:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:37:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:37:15,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-08-29 22:37:15,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:15,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:15,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-08-29 22:37:15,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:15,569 INFO L130 PetriNetUnfolder]: 1067/1802 cut-off events. [2023-08-29 22:37:15,569 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 22:37:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3710 conditions, 1802 events. 1067/1802 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 9817 event pairs, 873 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 3694. Up to 1802 conditions per place. [2023-08-29 22:37:15,576 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-29 22:37:15,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 303 flow [2023-08-29 22:37:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:37:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:37:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-08-29 22:37:15,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280639431616341 [2023-08-29 22:37:15,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-08-29 22:37:15,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-08-29 22:37:15,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:15,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-08-29 22:37:15,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:15,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:15,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:15,584 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 205 flow. Second operand 3 states and 723 transitions. [2023-08-29 22:37:15,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 303 flow [2023-08-29 22:37:15,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:15,586 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 202 flow [2023-08-29 22:37:15,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-29 22:37:15,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-08-29 22:37:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 202 flow [2023-08-29 22:37:15,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:15,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:15,587 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:37:15,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:15,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:15,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:15,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 722063534, now seen corresponding path program 2 times [2023-08-29 22:37:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280083081] [2023-08-29 22:37:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:37:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:15,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:15,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:37:15,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:37:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:37:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:37:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:15,937 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:37:15,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:37:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:16,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:37:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:16,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:16,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280083081] [2023-08-29 22:37:16,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280083081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:37:16,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:37:16,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:37:16,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307922472] [2023-08-29 22:37:16,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:37:16,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:37:16,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:37:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:37:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-29 22:37:20,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 202 flow. Second operand has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:20,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:20,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-29 22:37:20,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:25,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:26,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:28,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:29,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:37:34,630 INFO L130 PetriNetUnfolder]: 3543/5977 cut-off events. [2023-08-29 22:37:34,630 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-29 22:37:34,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12214 conditions, 5977 events. 3543/5977 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37051 event pairs, 2910 based on Foata normal form. 12/2882 useless extension candidates. Maximal degree in co-relation 12197. Up to 980 conditions per place. [2023-08-29 22:37:34,648 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 315 selfloop transitions, 32 changer transitions 0/347 dead transitions. [2023-08-29 22:37:34,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 347 transitions, 1628 flow [2023-08-29 22:37:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:37:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:37:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2987 transitions. [2023-08-29 22:37:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44212551805802247 [2023-08-29 22:37:34,656 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2987 transitions. [2023-08-29 22:37:34,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2987 transitions. [2023-08-29 22:37:34,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:34,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2987 transitions. [2023-08-29 22:37:34,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 248.91666666666666) internal successors, (2987), 12 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:34,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:34,671 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 563.0) internal successors, (7319), 13 states have internal predecessors, (7319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:34,671 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 202 flow. Second operand 12 states and 2987 transitions. [2023-08-29 22:37:34,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 347 transitions, 1628 flow [2023-08-29 22:37:34,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 347 transitions, 1627 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:34,677 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 445 flow [2023-08-29 22:37:34,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=445, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-08-29 22:37:34,677 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-29 22:37:34,677 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 445 flow [2023-08-29 22:37:34,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:34,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:34,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:37:34,691 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 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:34,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:34,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash 787464540, now seen corresponding path program 1 times [2023-08-29 22:37:34,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047658076] [2023-08-29 22:37:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:34,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:34,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:34,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:34,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:37:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:35,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:35,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047658076] [2023-08-29 22:37:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047658076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:35,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:37:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341460141] [2023-08-29 22:37:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:37:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:37:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:37:35,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-29 22:37:35,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 445 flow. Second operand has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:35,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:35,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-29 22:37:35,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:36,208 INFO L130 PetriNetUnfolder]: 4224/7320 cut-off events. [2023-08-29 22:37:36,209 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2023-08-29 22:37:36,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 7320 events. 4224/7320 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 49002 event pairs, 2970 based on Foata normal form. 0/3819 useless extension candidates. Maximal degree in co-relation 15073. Up to 5976 conditions per place. [2023-08-29 22:37:36,232 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 109 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-29 22:37:36,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 883 flow [2023-08-29 22:37:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:37:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:37:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1194 transitions. [2023-08-29 22:37:36,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241563055062167 [2023-08-29 22:37:36,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1194 transitions. [2023-08-29 22:37:36,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1194 transitions. [2023-08-29 22:37:36,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:36,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1194 transitions. [2023-08-29 22:37:36,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:36,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:36,244 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:36,244 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 445 flow. Second operand 5 states and 1194 transitions. [2023-08-29 22:37:36,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 883 flow [2023-08-29 22:37:36,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 800 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-29 22:37:36,248 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 411 flow [2023-08-29 22:37:36,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-29 22:37:36,249 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-29 22:37:36,249 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 411 flow [2023-08-29 22:37:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:36,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:36,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:37:36,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:36,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:36,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:36,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash 974536312, now seen corresponding path program 1 times [2023-08-29 22:37:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515939540] [2023-08-29 22:37:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:36,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:36,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:37:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:37:36,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:36,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515939540] [2023-08-29 22:37:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515939540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:36,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:36,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:37:36,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109660976] [2023-08-29 22:37:36,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:37:36,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:37:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:37:36,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-29 22:37:36,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:36,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:36,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-29 22:37:36,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:37,973 INFO L130 PetriNetUnfolder]: 3939/6859 cut-off events. [2023-08-29 22:37:37,973 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2023-08-29 22:37:37,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15314 conditions, 6859 events. 3939/6859 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 45480 event pairs, 3171 based on Foata normal form. 16/3789 useless extension candidates. Maximal degree in co-relation 15286. Up to 6583 conditions per place. [2023-08-29 22:37:38,002 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 85 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2023-08-29 22:37:38,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 684 flow [2023-08-29 22:37:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:37:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:37:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1191 transitions. [2023-08-29 22:37:38,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230905861456483 [2023-08-29 22:37:38,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1191 transitions. [2023-08-29 22:37:38,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1191 transitions. [2023-08-29 22:37:38,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:38,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1191 transitions. [2023-08-29 22:37:38,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.2) internal successors, (1191), 5 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:38,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:38,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:38,015 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 411 flow. Second operand 5 states and 1191 transitions. [2023-08-29 22:37:38,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 684 flow [2023-08-29 22:37:38,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 678 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:37:38,026 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 485 flow [2023-08-29 22:37:38,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-29 22:37:38,026 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-08-29 22:37:38,027 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 485 flow [2023-08-29 22:37:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.4) internal successors, (1127), 5 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:38,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:37:38,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:38,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:38,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 144461704, now seen corresponding path program 1 times [2023-08-29 22:37:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:38,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149577349] [2023-08-29 22:37:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:38,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:38,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:37:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:37:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:38,430 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:37:38,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:37:38,470 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:37:38,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:37:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:37:38,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:37:38,592 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:37:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:37:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:37:38,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:37:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:37:41,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149577349] [2023-08-29 22:37:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149577349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:37:41,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:37:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:37:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066049556] [2023-08-29 22:37:41,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:37:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:37:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:37:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:37:45,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 563 [2023-08-29 22:37:45,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:45,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:45,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 563 [2023-08-29 22:37:45,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:37:58,860 INFO L130 PetriNetUnfolder]: 13770/23630 cut-off events. [2023-08-29 22:37:58,860 INFO L131 PetriNetUnfolder]: For 4058/4058 co-relation queries the response was YES. [2023-08-29 22:37:58,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56336 conditions, 23630 events. 13770/23630 cut-off events. For 4058/4058 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 191338 event pairs, 3426 based on Foata normal form. 0/12634 useless extension candidates. Maximal degree in co-relation 56305. Up to 3738 conditions per place. [2023-08-29 22:37:58,961 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 546 selfloop transitions, 87 changer transitions 0/633 dead transitions. [2023-08-29 22:37:58,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 633 transitions, 3501 flow [2023-08-29 22:37:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 22:37:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 22:37:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7379 transitions. [2023-08-29 22:37:58,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39716884654717693 [2023-08-29 22:37:58,978 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7379 transitions. [2023-08-29 22:37:58,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7379 transitions. [2023-08-29 22:37:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:37:58,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7379 transitions. [2023-08-29 22:37:59,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 223.6060606060606) internal successors, (7379), 33 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,091 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,091 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 485 flow. Second operand 33 states and 7379 transitions. [2023-08-29 22:37:59,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 633 transitions, 3501 flow [2023-08-29 22:37:59,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 633 transitions, 3454 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-29 22:37:59,155 INFO L231 Difference]: Finished difference. Result has 111 places, 152 transitions, 1177 flow [2023-08-29 22:37:59,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1177, PETRI_PLACES=111, PETRI_TRANSITIONS=152} [2023-08-29 22:37:59,156 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-08-29 22:37:59,157 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 152 transitions, 1177 flow [2023-08-29 22:37:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:37:59,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:37:59,170 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 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:37:59,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:59,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:37:59,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:37:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 842118659, now seen corresponding path program 1 times [2023-08-29 22:37:59,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:37:59,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927810168] [2023-08-29 22:37:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:37:59,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:37:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:37:59,370 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:37:59,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:37:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:37:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:37:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:37:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:37:59,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:37:59,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:37:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927810168] [2023-08-29 22:37:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927810168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:37:59,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:37:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:37:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130397691] [2023-08-29 22:37:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:37:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:37:59,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:37:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:37:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:37:59,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-29 22:37:59,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 152 transitions, 1177 flow. Second operand has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:37:59,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:37:59,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-29 22:37:59,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:02,290 INFO L130 PetriNetUnfolder]: 13330/22870 cut-off events. [2023-08-29 22:38:02,290 INFO L131 PetriNetUnfolder]: For 17012/17012 co-relation queries the response was YES. [2023-08-29 22:38:02,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 22870 events. 13330/22870 cut-off events. For 17012/17012 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 182511 event pairs, 10986 based on Foata normal form. 0/14002 useless extension candidates. Maximal degree in co-relation 60674. Up to 22286 conditions per place. [2023-08-29 22:38:02,379 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 182 selfloop transitions, 4 changer transitions 0/186 dead transitions. [2023-08-29 22:38:02,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1754 flow [2023-08-29 22:38:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2023-08-29 22:38:02,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202486678507993 [2023-08-29 22:38:02,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2023-08-29 22:38:02,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2023-08-29 22:38:02,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:02,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2023-08-29 22:38:02,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:02,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:02,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:02,388 INFO L175 Difference]: Start difference. First operand has 111 places, 152 transitions, 1177 flow. Second operand 5 states and 1183 transitions. [2023-08-29 22:38:02,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1754 flow [2023-08-29 22:38:02,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1651 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-29 22:38:02,488 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1114 flow [2023-08-29 22:38:02,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1114, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2023-08-29 22:38:02,489 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2023-08-29 22:38:02,489 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1114 flow [2023-08-29 22:38:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:02,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:02,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:02,497 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 (13)] Ended with exit code 0 [2023-08-29 22:38:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:02,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:02,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 144461703, now seen corresponding path program 1 times [2023-08-29 22:38:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:02,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702286859] [2023-08-29 22:38:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:02,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:02,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:02,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:02,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:38:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:38:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:02,825 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:38:02,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:38:02,855 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:38:02,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:38:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:38:02,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:02,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702286859] [2023-08-29 22:38:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702286859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:02,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:38:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170602861] [2023-08-29 22:38:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:03,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-29 22:38:03,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:03,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:03,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-29 22:38:03,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:05,218 INFO L130 PetriNetUnfolder]: 10000/17266 cut-off events. [2023-08-29 22:38:05,218 INFO L131 PetriNetUnfolder]: For 14780/14780 co-relation queries the response was YES. [2023-08-29 22:38:05,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50936 conditions, 17266 events. 10000/17266 cut-off events. For 14780/14780 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 131836 event pairs, 8124 based on Foata normal form. 630/12694 useless extension candidates. Maximal degree in co-relation 50897. Up to 17253 conditions per place. [2023-08-29 22:38:05,284 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 138 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2023-08-29 22:38:05,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 150 transitions, 1402 flow [2023-08-29 22:38:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:38:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:38:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 904 transitions. [2023-08-29 22:38:05,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40142095914742454 [2023-08-29 22:38:05,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 904 transitions. [2023-08-29 22:38:05,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 904 transitions. [2023-08-29 22:38:05,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:05,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 904 transitions. [2023-08-29 22:38:05,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:05,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:05,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:05,292 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1114 flow. Second operand 4 states and 904 transitions. [2023-08-29 22:38:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 150 transitions, 1402 flow [2023-08-29 22:38:05,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 150 transitions, 1325 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:05,532 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1049 flow [2023-08-29 22:38:05,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1049, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2023-08-29 22:38:05,533 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2023-08-29 22:38:05,533 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1049 flow [2023-08-29 22:38:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:05,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:05,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:05,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:05,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:05,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 144461753, now seen corresponding path program 1 times [2023-08-29 22:38:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214202915] [2023-08-29 22:38:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:05,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:05,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:05,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 22:38:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:38:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:05,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:38:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:38:05,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:05,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214202915] [2023-08-29 22:38:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214202915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:05,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:38:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504378157] [2023-08-29 22:38:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:38:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:38:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:38:05,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 563 [2023-08-29 22:38:05,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1049 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:05,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:05,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 563 [2023-08-29 22:38:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:07,658 INFO L130 PetriNetUnfolder]: 7201/12625 cut-off events. [2023-08-29 22:38:07,658 INFO L131 PetriNetUnfolder]: For 11903/11903 co-relation queries the response was YES. [2023-08-29 22:38:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36094 conditions, 12625 events. 7201/12625 cut-off events. For 11903/11903 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 93104 event pairs, 5703 based on Foata normal form. 0/9985 useless extension candidates. Maximal degree in co-relation 36055. Up to 12553 conditions per place. [2023-08-29 22:38:07,705 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 121 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2023-08-29 22:38:07,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 133 transitions, 1210 flow [2023-08-29 22:38:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:38:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:38:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2023-08-29 22:38:07,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008880994671403 [2023-08-29 22:38:07,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2023-08-29 22:38:07,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2023-08-29 22:38:07,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:07,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2023-08-29 22:38:07,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:07,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:07,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:07,713 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1049 flow. Second operand 4 states and 901 transitions. [2023-08-29 22:38:07,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 133 transitions, 1210 flow [2023-08-29 22:38:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:07,847 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 955 flow [2023-08-29 22:38:07,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2023-08-29 22:38:07,848 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2023-08-29 22:38:07,848 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 955 flow [2023-08-29 22:38:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:07,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:07,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:07,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:08,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:08,049 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:08,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash 144461752, now seen corresponding path program 1 times [2023-08-29 22:38:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712573414] [2023-08-29 22:38:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:08,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:08,051 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:08,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 22:38:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:08,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:08,287 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 25 treesize of output 21 [2023-08-29 22:38:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:08,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712573414] [2023-08-29 22:38:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712573414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:08,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:38:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890384792] [2023-08-29 22:38:08,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:38:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:38:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:38:10,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-29 22:38:10,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 955 flow. Second operand has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:10,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:10,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-29 22:38:10,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:13,334 INFO L130 PetriNetUnfolder]: 8281/14677 cut-off events. [2023-08-29 22:38:13,335 INFO L131 PetriNetUnfolder]: For 17678/17678 co-relation queries the response was YES. [2023-08-29 22:38:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42240 conditions, 14677 events. 8281/14677 cut-off events. For 17678/17678 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 111465 event pairs, 2517 based on Foata normal form. 0/12361 useless extension candidates. Maximal degree in co-relation 42201. Up to 5208 conditions per place. [2023-08-29 22:38:13,409 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 179 selfloop transitions, 52 changer transitions 0/231 dead transitions. [2023-08-29 22:38:13,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 231 transitions, 1780 flow [2023-08-29 22:38:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:38:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:38:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2507 transitions. [2023-08-29 22:38:13,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048118843855966 [2023-08-29 22:38:13,415 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2507 transitions. [2023-08-29 22:38:13,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2507 transitions. [2023-08-29 22:38:13,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:13,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2507 transitions. [2023-08-29 22:38:13,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.9090909090909) internal successors, (2507), 11 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:13,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:13,424 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:13,425 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 955 flow. Second operand 11 states and 2507 transitions. [2023-08-29 22:38:13,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 231 transitions, 1780 flow [2023-08-29 22:38:13,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 231 transitions, 1766 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:13,594 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1143 flow [2023-08-29 22:38:13,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1143, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2023-08-29 22:38:13,594 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-08-29 22:38:13,595 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1143 flow [2023-08-29 22:38:13,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.4) internal successors, (2164), 10 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:13,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:13,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:13,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:13,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:13,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 229464159, now seen corresponding path program 1 times [2023-08-29 22:38:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:13,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404584413] [2023-08-29 22:38:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:13,807 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:13,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 22:38:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:13,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:38:13,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404584413] [2023-08-29 22:38:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404584413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:38:13,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:38:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:38:13,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897119089] [2023-08-29 22:38:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:38:13,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:38:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:38:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:38:14,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 563 [2023-08-29 22:38:14,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1143 flow. Second operand has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:14,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:14,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 563 [2023-08-29 22:38:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:15,817 INFO L130 PetriNetUnfolder]: 8203/14551 cut-off events. [2023-08-29 22:38:15,817 INFO L131 PetriNetUnfolder]: For 19486/19486 co-relation queries the response was YES. [2023-08-29 22:38:15,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45000 conditions, 14551 events. 8203/14551 cut-off events. For 19486/19486 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 110375 event pairs, 6603 based on Foata normal form. 24/12415 useless extension candidates. Maximal degree in co-relation 44957. Up to 14313 conditions per place. [2023-08-29 22:38:15,891 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 139 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2023-08-29 22:38:15,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 156 transitions, 1534 flow [2023-08-29 22:38:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:38:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:38:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1171 transitions. [2023-08-29 22:38:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41598579040852574 [2023-08-29 22:38:15,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1171 transitions. [2023-08-29 22:38:15,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1171 transitions. [2023-08-29 22:38:15,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:15,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1171 transitions. [2023-08-29 22:38:15,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.2) internal successors, (1171), 5 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:15,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:15,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:15,897 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1143 flow. Second operand 5 states and 1171 transitions. [2023-08-29 22:38:15,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 156 transitions, 1534 flow [2023-08-29 22:38:16,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1476 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-29 22:38:16,033 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1148 flow [2023-08-29 22:38:16,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2023-08-29 22:38:16,033 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2023-08-29 22:38:16,033 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1148 flow [2023-08-29 22:38:16,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:16,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:16,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:16,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:16,239 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:16,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1391682927, now seen corresponding path program 1 times [2023-08-29 22:38:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800166895] [2023-08-29 22:38:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:16,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:16,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 22:38:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:38:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:16,400 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:38:16,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:38:16,447 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:38:16,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:38:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:16,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:38:16,546 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:38:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:38:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:18,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800166895] [2023-08-29 22:38:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800166895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:18,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:38:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248643822] [2023-08-29 22:38:18,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:38:18,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:38:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:38:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 563 [2023-08-29 22:38:22,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1148 flow. Second operand has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:22,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:22,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 563 [2023-08-29 22:38:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:33,412 INFO L130 PetriNetUnfolder]: 10759/18745 cut-off events. [2023-08-29 22:38:33,412 INFO L131 PetriNetUnfolder]: For 35188/35188 co-relation queries the response was YES. [2023-08-29 22:38:33,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62134 conditions, 18745 events. 10759/18745 cut-off events. For 35188/35188 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 147246 event pairs, 5325 based on Foata normal form. 0/15883 useless extension candidates. Maximal degree in co-relation 62092. Up to 4141 conditions per place. [2023-08-29 22:38:33,505 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 498 selfloop transitions, 63 changer transitions 0/561 dead transitions. [2023-08-29 22:38:33,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 561 transitions, 4352 flow [2023-08-29 22:38:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 22:38:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 22:38:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7234 transitions. [2023-08-29 22:38:33,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38936433607836807 [2023-08-29 22:38:33,512 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7234 transitions. [2023-08-29 22:38:33,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7234 transitions. [2023-08-29 22:38:33,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:33,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7234 transitions. [2023-08-29 22:38:33,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 219.21212121212122) internal successors, (7234), 33 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:33,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:33,529 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 563.0) internal successors, (19142), 34 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:33,529 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1148 flow. Second operand 33 states and 7234 transitions. [2023-08-29 22:38:33,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 561 transitions, 4352 flow [2023-08-29 22:38:33,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 561 transitions, 4321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:38:33,699 INFO L231 Difference]: Finished difference. Result has 159 places, 168 transitions, 1488 flow [2023-08-29 22:38:33,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1488, PETRI_PLACES=159, PETRI_TRANSITIONS=168} [2023-08-29 22:38:33,700 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-08-29 22:38:33,700 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 168 transitions, 1488 flow [2023-08-29 22:38:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.0) internal successors, (2070), 10 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:33,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:33,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:33,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:33,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:33,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:33,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1391683065, now seen corresponding path program 1 times [2023-08-29 22:38:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:33,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121440021] [2023-08-29 22:38:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:33,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:33,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:33,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 22:38:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:38:34,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:34,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:34,173 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 25 treesize of output 21 [2023-08-29 22:38:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:34,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:34,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121440021] [2023-08-29 22:38:34,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121440021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:34,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:34,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:38:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730964173] [2023-08-29 22:38:34,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:34,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:38:34,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:38:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:38:35,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-29 22:38:35,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 168 transitions, 1488 flow. Second operand has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:35,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:35,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-29 22:38:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:39,475 INFO L130 PetriNetUnfolder]: 11515/20347 cut-off events. [2023-08-29 22:38:39,475 INFO L131 PetriNetUnfolder]: For 79863/79863 co-relation queries the response was YES. [2023-08-29 22:38:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86409 conditions, 20347 events. 11515/20347 cut-off events. For 79863/79863 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 164578 event pairs, 6513 based on Foata normal form. 360/19087 useless extension candidates. Maximal degree in co-relation 86360. Up to 12380 conditions per place. [2023-08-29 22:38:39,613 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 221 selfloop transitions, 49 changer transitions 0/270 dead transitions. [2023-08-29 22:38:39,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 2683 flow [2023-08-29 22:38:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:38:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:38:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2042 transitions. [2023-08-29 22:38:39,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40299980264456287 [2023-08-29 22:38:39,615 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2042 transitions. [2023-08-29 22:38:39,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2042 transitions. [2023-08-29 22:38:39,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:39,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2042 transitions. [2023-08-29 22:38:39,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.88888888888889) internal successors, (2042), 9 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,620 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:39,620 INFO L175 Difference]: Start difference. First operand has 159 places, 168 transitions, 1488 flow. Second operand 9 states and 2042 transitions. [2023-08-29 22:38:39,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 2683 flow [2023-08-29 22:38:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 2593 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-29 22:38:40,490 INFO L231 Difference]: Finished difference. Result has 163 places, 165 transitions, 1521 flow [2023-08-29 22:38:40,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=163, PETRI_TRANSITIONS=165} [2023-08-29 22:38:40,491 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-08-29 22:38:40,491 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 165 transitions, 1521 flow [2023-08-29 22:38:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.8) internal successors, (2168), 10 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:40,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:40,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:40,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 22:38:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:40,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:40,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1388823273, now seen corresponding path program 1 times [2023-08-29 22:38:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190310052] [2023-08-29 22:38:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:38:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:40,694 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:40,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 22:38:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:38:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:38:40,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:40,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:40,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190310052] [2023-08-29 22:38:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190310052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:40,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:40,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:38:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061559368] [2023-08-29 22:38:40,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:38:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:38:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:38:41,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-08-29 22:38:41,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 165 transitions, 1521 flow. Second operand has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:41,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:41,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-08-29 22:38:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:38:44,608 INFO L130 PetriNetUnfolder]: 10003/17809 cut-off events. [2023-08-29 22:38:44,608 INFO L131 PetriNetUnfolder]: For 117182/117182 co-relation queries the response was YES. [2023-08-29 22:38:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78305 conditions, 17809 events. 10003/17809 cut-off events. For 117182/117182 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 142487 event pairs, 6766 based on Foata normal form. 288/17953 useless extension candidates. Maximal degree in co-relation 78253. Up to 13706 conditions per place. [2023-08-29 22:38:44,736 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 225 selfloop transitions, 27 changer transitions 0/252 dead transitions. [2023-08-29 22:38:44,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 252 transitions, 2629 flow [2023-08-29 22:38:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:38:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:38:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-08-29 22:38:44,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-08-29 22:38:44,738 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-08-29 22:38:44,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-08-29 22:38:44,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:38:44,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-08-29 22:38:44,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:44,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:44,744 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:44,744 INFO L175 Difference]: Start difference. First operand has 163 places, 165 transitions, 1521 flow. Second operand 11 states and 2520 transitions. [2023-08-29 22:38:44,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 252 transitions, 2629 flow [2023-08-29 22:38:45,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 252 transitions, 2546 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-29 22:38:45,281 INFO L231 Difference]: Finished difference. Result has 167 places, 163 transitions, 1568 flow [2023-08-29 22:38:45,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1568, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2023-08-29 22:38:45,282 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2023-08-29 22:38:45,282 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 1568 flow [2023-08-29 22:38:45,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.66666666666666) internal successors, (2660), 12 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:45,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:38:45,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:38:45,289 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 [2023-08-29 22:38:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:45,483 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:38:45,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:38:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367364, now seen corresponding path program 2 times [2023-08-29 22:38:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:38:45,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077076183] [2023-08-29 22:38:45,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:38:45,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:38:45,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:38:45,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:38:45,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 22:38:45,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:38:45,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:38:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:38:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:38:45,630 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:38:45,630 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 27 [2023-08-29 22:38:45,671 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:38:45,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:38:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:38:45,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:38:45,734 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:38:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:38:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:45,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:38:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:38:46,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:38:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077076183] [2023-08-29 22:38:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077076183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:38:46,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:38:46,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:38:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009793423] [2023-08-29 22:38:46,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:38:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:38:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:38:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:38:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:38:51,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:38:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 563 [2023-08-29 22:38:57,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 1568 flow. Second operand has 14 states, 14 states have (on average 209.57142857142858) internal successors, (2934), 14 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:38:57,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:38:57,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 563 [2023-08-29 22:38:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:02,954 INFO L130 PetriNetUnfolder]: 13585/24361 cut-off events. [2023-08-29 22:39:02,954 INFO L131 PetriNetUnfolder]: For 198384/198384 co-relation queries the response was YES. [2023-08-29 22:39:03,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105411 conditions, 24361 events. 13585/24361 cut-off events. For 198384/198384 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 204438 event pairs, 2860 based on Foata normal form. 468/24541 useless extension candidates. Maximal degree in co-relation 105358. Up to 5736 conditions per place. [2023-08-29 22:39:03,095 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 356 selfloop transitions, 65 changer transitions 0/421 dead transitions. [2023-08-29 22:39:03,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 421 transitions, 4084 flow [2023-08-29 22:39:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:39:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:39:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3797 transitions. [2023-08-29 22:39:03,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39671925608609343 [2023-08-29 22:39:03,099 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3797 transitions. [2023-08-29 22:39:03,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3797 transitions. [2023-08-29 22:39:03,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:03,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3797 transitions. [2023-08-29 22:39:03,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 223.35294117647058) internal successors, (3797), 17 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,110 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 563.0) internal successors, (10134), 18 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,110 INFO L175 Difference]: Start difference. First operand has 167 places, 163 transitions, 1568 flow. Second operand 17 states and 3797 transitions. [2023-08-29 22:39:03,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 421 transitions, 4084 flow [2023-08-29 22:39:03,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 421 transitions, 4068 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:03,696 INFO L231 Difference]: Finished difference. Result has 186 places, 183 transitions, 1937 flow [2023-08-29 22:39:03,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1937, PETRI_PLACES=186, PETRI_TRANSITIONS=183} [2023-08-29 22:39:03,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2023-08-29 22:39:03,697 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 183 transitions, 1937 flow [2023-08-29 22:39:03,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.57142857142858) internal successors, (2934), 14 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:03,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:03,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:03,707 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 [2023-08-29 22:39:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:03,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:39:03,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1038367412, now seen corresponding path program 1 times [2023-08-29 22:39:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:03,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303789104] [2023-08-29 22:39:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:03,906 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:03,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 22:39:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:39:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:04,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:39:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:39:04,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:39:04,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303789104] [2023-08-29 22:39:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303789104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:04,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 22:39:04,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096581293] [2023-08-29 22:39:04,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:39:04,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:39:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:39:07,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 563 [2023-08-29 22:39:07,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 183 transitions, 1937 flow. Second operand has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:07,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:07,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 563 [2023-08-29 22:39:07,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:14,231 INFO L130 PetriNetUnfolder]: 20056/35764 cut-off events. [2023-08-29 22:39:14,232 INFO L131 PetriNetUnfolder]: For 333462/333462 co-relation queries the response was YES. [2023-08-29 22:39:14,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167483 conditions, 35764 events. 20056/35764 cut-off events. For 333462/333462 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 310132 event pairs, 2456 based on Foata normal form. 486/36106 useless extension candidates. Maximal degree in co-relation 167423. Up to 6931 conditions per place. [2023-08-29 22:39:14,471 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 309 selfloop transitions, 91 changer transitions 0/400 dead transitions. [2023-08-29 22:39:14,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 400 transitions, 4549 flow [2023-08-29 22:39:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:39:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:39:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2062 transitions. [2023-08-29 22:39:14,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694691138740874 [2023-08-29 22:39:14,473 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2062 transitions. [2023-08-29 22:39:14,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2062 transitions. [2023-08-29 22:39:14,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:14,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2062 transitions. [2023-08-29 22:39:14,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.11111111111111) internal successors, (2062), 9 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:14,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:14,478 INFO L175 Difference]: Start difference. First operand has 186 places, 183 transitions, 1937 flow. Second operand 9 states and 2062 transitions. [2023-08-29 22:39:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 400 transitions, 4549 flow [2023-08-29 22:39:15,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 400 transitions, 4442 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-29 22:39:15,685 INFO L231 Difference]: Finished difference. Result has 192 places, 209 transitions, 2415 flow [2023-08-29 22:39:15,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2415, PETRI_PLACES=192, PETRI_TRANSITIONS=209} [2023-08-29 22:39:15,686 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2023-08-29 22:39:15,686 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 209 transitions, 2415 flow [2023-08-29 22:39:15,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.5) internal successors, (2610), 12 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:15,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:15,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:39:15,694 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 [2023-08-29 22:39:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:15,887 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:39:15,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 192505985, now seen corresponding path program 1 times [2023-08-29 22:39:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130890869] [2023-08-29 22:39:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:39:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:15,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:15,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 22:39:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:39:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:39:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:39:16,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:39:16,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:16,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130890869] [2023-08-29 22:39:16,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130890869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:16,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:16,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:39:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398112851] [2023-08-29 22:39:16,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:16,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:39:16,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:39:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:39:16,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 563 [2023-08-29 22:39:16,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 209 transitions, 2415 flow. Second operand has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:16,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:16,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 563 [2023-08-29 22:39:16,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:23,017 INFO L130 PetriNetUnfolder]: 19084/34252 cut-off events. [2023-08-29 22:39:23,018 INFO L131 PetriNetUnfolder]: For 335058/335058 co-relation queries the response was YES. [2023-08-29 22:39:23,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165877 conditions, 34252 events. 19084/34252 cut-off events. For 335058/335058 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 300638 event pairs, 15306 based on Foata normal form. 810/35062 useless extension candidates. Maximal degree in co-relation 165816. Up to 30644 conditions per place. [2023-08-29 22:39:23,251 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 261 selfloop transitions, 30 changer transitions 0/291 dead transitions. [2023-08-29 22:39:23,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 291 transitions, 3503 flow [2023-08-29 22:39:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:39:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:39:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2520 transitions. [2023-08-29 22:39:23,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069110285806556 [2023-08-29 22:39:23,255 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2520 transitions. [2023-08-29 22:39:23,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2520 transitions. [2023-08-29 22:39:23,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:39:23,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2520 transitions. [2023-08-29 22:39:23,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0909090909091) internal successors, (2520), 11 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,262 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:23,262 INFO L175 Difference]: Start difference. First operand has 192 places, 209 transitions, 2415 flow. Second operand 11 states and 2520 transitions. [2023-08-29 22:39:23,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 291 transitions, 3503 flow [2023-08-29 22:39:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 291 transitions, 3433 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:39:24,709 INFO L231 Difference]: Finished difference. Result has 197 places, 206 transitions, 2402 flow [2023-08-29 22:39:24,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2402, PETRI_PLACES=197, PETRI_TRANSITIONS=206} [2023-08-29 22:39:24,709 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2023-08-29 22:39:24,710 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 206 transitions, 2402 flow [2023-08-29 22:39:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.83333333333334) internal successors, (2662), 12 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:24,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:39:24,710 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 22:39:24,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 22:39:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:24,912 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:39:24,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:39:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1658630862, now seen corresponding path program 3 times [2023-08-29 22:39:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:39:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813038673] [2023-08-29 22:39:24,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:39:24,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:39:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:39:24,914 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:39:24,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 22:39:25,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:39:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:39:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:39:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:39:25,140 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:39:25,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:39:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:25,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:39:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:39:27,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:39:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813038673] [2023-08-29 22:39:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813038673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:39:27,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:39:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 22:39:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514616601] [2023-08-29 22:39:27,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:39:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 22:39:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:39:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 22:39:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 22:39:46,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-29 22:39:46,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 206 transitions, 2402 flow. Second operand has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:39:46,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:39:46,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-29 22:39:46,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:39:53,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:55,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:57,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:39:59,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:01,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:04,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:06,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:08,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:10,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:13,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:15,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:18,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:19,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:22,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:25,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:28,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:33,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:40:49,809 INFO L130 PetriNetUnfolder]: 42284/75832 cut-off events. [2023-08-29 22:40:49,809 INFO L131 PetriNetUnfolder]: For 785263/785263 co-relation queries the response was YES. [2023-08-29 22:40:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376107 conditions, 75832 events. 42284/75832 cut-off events. For 785263/785263 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 704959 event pairs, 36816 based on Foata normal form. 36/75868 useless extension candidates. Maximal degree in co-relation 376044. Up to 13601 conditions per place. [2023-08-29 22:40:50,646 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 1244 selfloop transitions, 100 changer transitions 0/1344 dead transitions. [2023-08-29 22:40:50,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1344 transitions, 17627 flow [2023-08-29 22:40:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 22:40:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 22:40:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8452 transitions. [2023-08-29 22:40:50,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170120386816657 [2023-08-29 22:40:50,655 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8452 transitions. [2023-08-29 22:40:50,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8452 transitions. [2023-08-29 22:40:50,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:40:50,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8452 transitions. [2023-08-29 22:40:50,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 234.77777777777777) internal successors, (8452), 36 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:50,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 563.0) internal successors, (20831), 37 states have internal predecessors, (20831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:50,679 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 563.0) internal successors, (20831), 37 states have internal predecessors, (20831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:50,679 INFO L175 Difference]: Start difference. First operand has 197 places, 206 transitions, 2402 flow. Second operand 36 states and 8452 transitions. [2023-08-29 22:40:50,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1344 transitions, 17627 flow [2023-08-29 22:40:59,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1344 transitions, 17482 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 22:40:59,322 INFO L231 Difference]: Finished difference. Result has 248 places, 265 transitions, 3596 flow [2023-08-29 22:40:59,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3596, PETRI_PLACES=248, PETRI_TRANSITIONS=265} [2023-08-29 22:40:59,323 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 194 predicate places. [2023-08-29 22:40:59,323 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 265 transitions, 3596 flow [2023-08-29 22:40:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 220.0) internal successors, (5280), 24 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:40:59,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:40:59,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:40:59,335 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 [2023-08-29 22:40:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:59,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:40:59,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:40:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692464, now seen corresponding path program 1 times [2023-08-29 22:40:59,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:40:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914572437] [2023-08-29 22:40:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:40:59,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:40:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:40:59,535 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:40:59,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 22:40:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:40:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:40:59,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:40:59,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:40:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:40:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:41:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:41:00,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:00,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914572437] [2023-08-29 22:41:00,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914572437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:41:00,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:41:00,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:41:00,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774877460] [2023-08-29 22:41:00,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:41:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:41:00,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:41:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:41:02,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 563 [2023-08-29 22:41:02,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 265 transitions, 3596 flow. Second operand has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:02,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:02,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 563 [2023-08-29 22:41:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:41:36,608 INFO L130 PetriNetUnfolder]: 86384/153172 cut-off events. [2023-08-29 22:41:36,608 INFO L131 PetriNetUnfolder]: For 1317710/1317710 co-relation queries the response was YES. [2023-08-29 22:41:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831467 conditions, 153172 events. 86384/153172 cut-off events. For 1317710/1317710 co-relation queries the response was YES. Maximal size of possible extension queue 3371. Compared 1553951 event pairs, 24144 based on Foata normal form. 10320/163492 useless extension candidates. Maximal degree in co-relation 831383. Up to 49328 conditions per place. [2023-08-29 22:41:38,826 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 506 selfloop transitions, 102 changer transitions 0/608 dead transitions. [2023-08-29 22:41:38,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 608 transitions, 8518 flow [2023-08-29 22:41:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:41:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:41:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1852 transitions. [2023-08-29 22:41:38,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411190053285968 [2023-08-29 22:41:38,829 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1852 transitions. [2023-08-29 22:41:38,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1852 transitions. [2023-08-29 22:41:38,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:41:38,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1852 transitions. [2023-08-29 22:41:38,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.5) internal successors, (1852), 8 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) [2023-08-29 22:41:38,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:38,833 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:38,833 INFO L175 Difference]: Start difference. First operand has 248 places, 265 transitions, 3596 flow. Second operand 8 states and 1852 transitions. [2023-08-29 22:41:38,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 608 transitions, 8518 flow [2023-08-29 22:41:50,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 608 transitions, 8318 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-08-29 22:41:50,603 INFO L231 Difference]: Finished difference. Result has 248 places, 271 transitions, 3825 flow [2023-08-29 22:41:50,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3825, PETRI_PLACES=248, PETRI_TRANSITIONS=271} [2023-08-29 22:41:50,604 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 194 predicate places. [2023-08-29 22:41:50,604 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 271 transitions, 3825 flow [2023-08-29 22:41:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:50,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:41:50,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:41:50,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:41:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:50,815 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:41:50,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:41:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2081692602, now seen corresponding path program 2 times [2023-08-29 22:41:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:41:50,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421484582] [2023-08-29 22:41:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:41:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:41:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:41:50,817 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:41:50,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 22:41:50,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:41:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:41:50,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:41:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:41:50,991 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:41:50,991 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 27 [2023-08-29 22:41:51,027 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:41:51,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:41:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:41:51,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:41:51,090 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:41:51,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:41:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:41:51,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:41:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:41:51,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:41:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421484582] [2023-08-29 22:41:51,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421484582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:41:51,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:41:51,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:41:51,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272511486] [2023-08-29 22:41:51,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:41:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:41:51,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:41:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:41:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:41:56,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:41:59,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 563 [2023-08-29 22:41:59,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 271 transitions, 3825 flow. Second operand has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:41:59,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:41:59,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 563 [2023-08-29 22:41:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:42:32,975 INFO L130 PetriNetUnfolder]: 79164/140872 cut-off events. [2023-08-29 22:42:32,975 INFO L131 PetriNetUnfolder]: For 1940552/1940552 co-relation queries the response was YES. [2023-08-29 22:42:34,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789501 conditions, 140872 events. 79164/140872 cut-off events. For 1940552/1940552 co-relation queries the response was YES. Maximal size of possible extension queue 3082. Compared 1419079 event pairs, 48440 based on Foata normal form. 5080/145952 useless extension candidates. Maximal degree in co-relation 789414. Up to 86221 conditions per place. [2023-08-29 22:42:35,073 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 563 selfloop transitions, 61 changer transitions 0/624 dead transitions. [2023-08-29 22:42:35,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 624 transitions, 8245 flow [2023-08-29 22:42:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:42:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:42:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3343 transitions. [2023-08-29 22:42:35,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958555358200118 [2023-08-29 22:42:35,077 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3343 transitions. [2023-08-29 22:42:35,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3343 transitions. [2023-08-29 22:42:35,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:42:35,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3343 transitions. [2023-08-29 22:42:35,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 222.86666666666667) internal successors, (3343), 15 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:35,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:35,087 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:42:35,087 INFO L175 Difference]: Start difference. First operand has 248 places, 271 transitions, 3825 flow. Second operand 15 states and 3343 transitions. [2023-08-29 22:42:35,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 624 transitions, 8245 flow [2023-08-29 22:43:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 624 transitions, 7982 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-08-29 22:43:25,999 INFO L231 Difference]: Finished difference. Result has 263 places, 273 transitions, 3799 flow [2023-08-29 22:43:25,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3799, PETRI_PLACES=263, PETRI_TRANSITIONS=273} [2023-08-29 22:43:26,000 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2023-08-29 22:43:26,000 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 273 transitions, 3799 flow [2023-08-29 22:43:26,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.71428571428572) internal successors, (2936), 14 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:26,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:43:26,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:43:26,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:43:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:26,201 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:43:26,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:43:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash -107953014, now seen corresponding path program 3 times [2023-08-29 22:43:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:43:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11730942] [2023-08-29 22:43:26,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:43:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:43:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:43:26,203 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:43:26,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 22:43:26,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:43:26,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:43:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:43:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:43:26,397 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:43:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:43:26,437 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:43:26,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:43:26,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:43:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:43:26,494 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:43:26,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:43:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:43:26,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:43:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:43:27,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:43:27,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11730942] [2023-08-29 22:43:27,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11730942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:43:27,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:43:27,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:43:27,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367275114] [2023-08-29 22:43:27,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:43:27,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:43:27,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:43:27,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:43:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:43:33,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 563 [2023-08-29 22:43:33,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 273 transitions, 3799 flow. Second operand has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:43:33,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:43:33,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 563 [2023-08-29 22:43:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:44:15,365 INFO L130 PetriNetUnfolder]: 97304/170852 cut-off events. [2023-08-29 22:44:15,365 INFO L131 PetriNetUnfolder]: For 2030288/2030288 co-relation queries the response was YES. [2023-08-29 22:44:17,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933615 conditions, 170852 events. 97304/170852 cut-off events. For 2030288/2030288 co-relation queries the response was YES. Maximal size of possible extension queue 3663. Compared 1718045 event pairs, 19764 based on Foata normal form. 13760/184612 useless extension candidates. Maximal degree in co-relation 933523. Up to 41123 conditions per place. [2023-08-29 22:44:18,169 INFO L137 encePairwiseOnDemand]: 557/563 looper letters, 705 selfloop transitions, 73 changer transitions 0/778 dead transitions. [2023-08-29 22:44:18,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 778 transitions, 10752 flow [2023-08-29 22:44:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:44:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:44:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2281 transitions. [2023-08-29 22:44:18,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051509769094139 [2023-08-29 22:44:18,175 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2281 transitions. [2023-08-29 22:44:18,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2281 transitions. [2023-08-29 22:44:18,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:44:18,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2281 transitions. [2023-08-29 22:44:18,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 228.1) internal successors, (2281), 10 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:18,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:18,181 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:44:18,181 INFO L175 Difference]: Start difference. First operand has 263 places, 273 transitions, 3799 flow. Second operand 10 states and 2281 transitions. [2023-08-29 22:44:18,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 778 transitions, 10752 flow [2023-08-29 22:45:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 778 transitions, 10500 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-29 22:45:07,080 INFO L231 Difference]: Finished difference. Result has 268 places, 283 transitions, 4018 flow [2023-08-29 22:45:07,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4018, PETRI_PLACES=268, PETRI_TRANSITIONS=283} [2023-08-29 22:45:07,081 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 214 predicate places. [2023-08-29 22:45:07,081 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 283 transitions, 4018 flow [2023-08-29 22:45:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 217.0) internal successors, (2604), 12 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:07,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:45:07,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:45:07,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:45:07,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:45:07,282 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 22:45:07,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:45:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1438703333, now seen corresponding path program 3 times [2023-08-29 22:45:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:45:07,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945184939] [2023-08-29 22:45:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:45:07,283 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 [2023-08-29 22:45:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:45:07,284 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:45:07,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-29 22:45:07,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:45:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:45:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 22:45:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:45:07,476 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:45:07,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:45:07,515 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:45:07,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:45:07,611 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:45:07,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:45:07,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-29 22:45:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:45:07,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:45:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:45:10,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:45:10,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945184939] [2023-08-29 22:45:10,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945184939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:45:10,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:45:10,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:45:10,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154556222] [2023-08-29 22:45:10,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:45:10,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:45:10,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:45:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:45:10,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:45:43,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:45:54,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 563 [2023-08-29 22:45:54,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 283 transitions, 4018 flow. Second operand has 16 states, 16 states have (on average 199.5) internal successors, (3192), 16 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:45:54,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:45:54,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 563 [2023-08-29 22:45:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:45:59,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]