./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:09:15,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:09:15,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:09:15,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:09:15,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:09:15,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:09:15,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:09:15,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:09:15,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:09:15,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:09:15,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:09:15,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:09:15,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:09:15,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:09:15,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:09:15,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:09:15,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:09:15,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:09:15,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:09:15,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:09:15,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:09:15,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:09:15,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:09:15,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:09:15,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:09:15,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:09:15,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:09:15,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:09:15,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:09:15,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:09:15,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:09:15,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:09:15,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:09:15,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:09:15,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:09:15,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:09:15,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:09:15,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:09:15,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:09:15,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:09:15,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:09:15,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:09:15,667 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:09:15,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:09:15,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:09:15,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:09:15,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:09:15,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:09:15,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:09:15,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:09:15,671 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:09:15,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:09:15,672 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:09:15,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:09:15,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:09:15,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:09:15,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:09:15,673 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:09:15,673 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:09:15,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:09:15,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:09:15,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:09:15,674 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:09:15,674 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:09:15,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:09:15,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:09:15,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:09:15,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:09:15,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:09:15,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:09:15,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:09:15,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:09:15,676 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:09:15,676 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:09:15,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:09:15,676 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:09:15,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:09:16,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:09:16,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:09:16,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:09:16,060 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:09:16,061 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:09:16,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-09-01 03:09:17,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:09:17,573 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:09:17,573 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-09-01 03:09:17,581 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd615f5b/07868c3e08b14827a393dfa084f1357f/FLAG4a9eea718 [2023-09-01 03:09:17,592 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd615f5b/07868c3e08b14827a393dfa084f1357f [2023-09-01 03:09:17,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:09:17,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:09:17,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:09:17,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:09:17,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:09:17,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:17" (1/1) ... [2023-09-01 03:09:17,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c920b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:17, skipping insertion in model container [2023-09-01 03:09:17,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:17" (1/1) ... [2023-09-01 03:09:17,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:09:17,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:09:17,830 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-09-01 03:09:17,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:09:17,860 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:09:17,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50d9e778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:17, skipping insertion in model container [2023-09-01 03:09:17,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:09:17,863 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:09:17,865 INFO L158 Benchmark]: Toolchain (without parser) took 268.62ms. Allocated memory is still 58.7MB. Free memory was 38.8MB in the beginning and 29.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:09:17,865 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:09:17,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.65ms. Allocated memory is still 58.7MB. Free memory was 38.6MB in the beginning and 29.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:09:17,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.65ms. Allocated memory is still 58.7MB. Free memory was 38.6MB in the beginning and 29.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:09:19,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:09:19,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:09:19,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:09:19,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:09:19,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:09:19,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:09:19,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:09:19,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:09:19,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:09:19,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:09:19,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:09:19,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:09:19,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:09:19,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:09:19,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:09:19,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:09:19,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:09:19,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:09:19,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:09:19,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:09:19,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:09:19,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:09:19,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:09:19,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:09:19,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:09:19,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:09:19,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:09:19,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:09:19,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:09:19,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:09:19,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:09:19,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:09:19,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:09:19,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:09:19,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:09:19,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:09:19,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:09:19,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:09:19,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:09:19,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:09:19,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:09:19,812 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:09:19,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:09:19,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:09:19,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:09:19,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:09:19,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:09:19,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:09:19,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:09:19,816 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:09:19,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:09:19,818 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:09:19,818 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:09:19,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:09:19,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:09:19,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:09:19,819 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:09:19,819 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:09:19,819 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:09:19,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:09:19,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:09:19,821 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:09:19,824 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:09:19,825 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:09:19,826 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:09:19,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:09:19,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:09:19,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:09:19,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:09:19,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:09:19,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:09:19,828 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:09:19,828 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:09:19,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:09:19,829 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:09:19,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:09:19,829 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:09:19,830 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:09:19,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:09:20,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:09:20,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:09:20,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:09:20,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:09:20,147 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:09:20,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-09-01 03:09:21,274 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:09:21,471 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:09:21,471 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-09-01 03:09:21,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98523593e/7be6fd33d631416785c1dea4083144fb/FLAG1c5eedaae [2023-09-01 03:09:21,491 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98523593e/7be6fd33d631416785c1dea4083144fb [2023-09-01 03:09:21,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:09:21,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:09:21,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:09:21,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:09:21,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:09:21,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e10c24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21, skipping insertion in model container [2023-09-01 03:09:21,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:09:21,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:09:21,689 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-09-01 03:09:21,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:09:21,711 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:09:21,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:09:21,726 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-09-01 03:09:21,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:09:21,735 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:09:21,753 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2023-09-01 03:09:21,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:09:21,767 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:09:21,767 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:09:21,773 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:09:21,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21 WrapperNode [2023-09-01 03:09:21,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:09:21,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:09:21,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:09:21,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:09:21,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,839 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 188 [2023-09-01 03:09:21,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:09:21,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:09:21,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:09:21,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:09:21,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:09:21,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:09:21,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:09:21,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:09:21,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (1/1) ... [2023-09-01 03:09:21,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:09:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:09:21,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:09:21,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:09:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:09:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:09:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:09:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:09:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:09:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:09:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:09:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:09:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:09:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:09:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:09:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:09:22,006 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:09:22,189 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:09:22,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:09:22,672 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:09:22,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:09:22,879 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:09:22,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:09:22 BoogieIcfgContainer [2023-09-01 03:09:22,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:09:22,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:09:22,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:09:22,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:09:22,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:09:21" (1/3) ... [2023-09-01 03:09:22,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149b98a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:09:22, skipping insertion in model container [2023-09-01 03:09:22,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:21" (2/3) ... [2023-09-01 03:09:22,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149b98a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:09:22, skipping insertion in model container [2023-09-01 03:09:22,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:09:22" (3/3) ... [2023-09-01 03:09:22,902 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-09-01 03:09:22,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:09:22,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 03:09:22,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:09:23,040 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:09:23,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 354 flow [2023-09-01 03:09:23,168 INFO L130 PetriNetUnfolder]: 12/162 cut-off events. [2023-09-01 03:09:23,168 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:09:23,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 12/162 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-09-01 03:09:23,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 165 transitions, 354 flow [2023-09-01 03:09:23,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 158 transitions, 334 flow [2023-09-01 03:09:23,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:09:23,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 158 transitions, 334 flow [2023-09-01 03:09:23,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 158 transitions, 334 flow [2023-09-01 03:09:23,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 158 transitions, 334 flow [2023-09-01 03:09:23,277 INFO L130 PetriNetUnfolder]: 12/158 cut-off events. [2023-09-01 03:09:23,278 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:09:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 12/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-09-01 03:09:23,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-09-01 03:09:42,618 INFO L134 LiptonReduction]: Checked pairs total: 2843 [2023-09-01 03:09:42,619 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-09-01 03:09:42,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:09:42,637 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;@750573a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:09:42,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-09-01 03:09:42,640 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:09:42,641 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:09:42,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:42,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:09:42,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:42,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 24637, now seen corresponding path program 1 times [2023-09-01 03:09:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439774215] [2023-09-01 03:09:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:42,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:42,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:42,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:09:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:42,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:09:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:43,012 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:09:43,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:09:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:43,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:43,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:43,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439774215] [2023-09-01 03:09:43,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439774215] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:43,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:43,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754177715] [2023-09-01 03:09:43,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:43,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-09-01 03:09:43,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:43,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:43,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-09-01 03:09:43,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:44,502 INFO L130 PetriNetUnfolder]: 5423/6918 cut-off events. [2023-09-01 03:09:44,503 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-09-01 03:09:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 6918 events. 5423/6918 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31474 event pairs, 2585 based on Foata normal form. 0/1869 useless extension candidates. Maximal degree in co-relation 5996. Up to 3433 conditions per place. [2023-09-01 03:09:44,562 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-09-01 03:09:44,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-09-01 03:09:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-09-01 03:09:44,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158974358974359 [2023-09-01 03:09:44,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-09-01 03:09:44,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-09-01 03:09:44,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:44,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-09-01 03:09:44,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:44,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:44,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:44,594 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 503 transitions. [2023-09-01 03:09:44,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-09-01 03:09:44,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:09:44,605 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-09-01 03:09:44,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-09-01 03:09:44,610 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-09-01 03:09:44,611 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-09-01 03:09:44,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:44,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:44,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:09:44,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:44,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:44,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 24694, now seen corresponding path program 1 times [2023-09-01 03:09:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115275875] [2023-09-01 03:09:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:44,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:44,829 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 (3)] Waiting until timeout for monitored process [2023-09-01 03:09:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:09:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:44,965 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-09-01 03:09:44,966 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 6 case distinctions, treesize of input 38 treesize of output 47 [2023-09-01 03:09:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:45,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:45,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115275875] [2023-09-01 03:09:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115275875] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:45,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:45,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182864295] [2023-09-01 03:09:45,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:45,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-09-01 03:09:45,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:45,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:45,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-09-01 03:09:45,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:45,972 INFO L130 PetriNetUnfolder]: 4283/5526 cut-off events. [2023-09-01 03:09:45,972 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:09:45,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11063 conditions, 5526 events. 4283/5526 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 24927 event pairs, 2038 based on Foata normal form. 0/1545 useless extension candidates. Maximal degree in co-relation 5529. Up to 5466 conditions per place. [2023-09-01 03:09:46,026 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 03:09:46,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 182 flow [2023-09-01 03:09:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-09-01 03:09:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728205128205128 [2023-09-01 03:09:46,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-09-01 03:09:46,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-09-01 03:09:46,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:46,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-09-01 03:09:46,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:46,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:46,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:46,036 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 461 transitions. [2023-09-01 03:09:46,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 182 flow [2023-09-01 03:09:46,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:46,037 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 102 flow [2023-09-01 03:09:46,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-09-01 03:09:46,038 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-09-01 03:09:46,039 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 102 flow [2023-09-01 03:09:46,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:46,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:46,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:09:46,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:46,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:46,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash 24695, now seen corresponding path program 1 times [2023-09-01 03:09:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49986584] [2023-09-01 03:09:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:46,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:46,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:46,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:09:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:46,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:09:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:46,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:46,455 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:09:46,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:09:46,489 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:09:46,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:09:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:46,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:46,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49986584] [2023-09-01 03:09:46,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49986584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:46,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301573473] [2023-09-01 03:09:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:46,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:46,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-09-01 03:09:46,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:46,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:46,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-09-01 03:09:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:47,292 INFO L130 PetriNetUnfolder]: 3133/4124 cut-off events. [2023-09-01 03:09:47,292 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:09:47,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8259 conditions, 4124 events. 3133/4124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18796 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8251. Up to 4064 conditions per place. [2023-09-01 03:09:47,317 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 03:09:47,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 174 flow [2023-09-01 03:09:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-09-01 03:09:47,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2023-09-01 03:09:47,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-09-01 03:09:47,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-09-01 03:09:47,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:47,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-09-01 03:09:47,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:47,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:47,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:47,326 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 102 flow. Second operand 3 states and 462 transitions. [2023-09-01 03:09:47,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 174 flow [2023-09-01 03:09:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:47,328 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 99 flow [2023-09-01 03:09:47,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-09-01 03:09:47,333 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-09-01 03:09:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 99 flow [2023-09-01 03:09:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:47,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:47,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:09:47,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 03:09:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:47,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:47,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 24636, now seen corresponding path program 1 times [2023-09-01 03:09:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711614645] [2023-09-01 03:09:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:47,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:47,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:47,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:47,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:09:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:09:47,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:47,680 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:09:47,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:09:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:47,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:47,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711614645] [2023-09-01 03:09:47,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711614645] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:47,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:47,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:47,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267367539] [2023-09-01 03:09:47,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:47,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:47,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:47,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:47,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-09-01 03:09:47,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:47,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:47,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-09-01 03:09:47,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:48,269 INFO L130 PetriNetUnfolder]: 3133/4122 cut-off events. [2023-09-01 03:09:48,269 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:09:48,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4122 events. 3133/4122 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18721 event pairs, 1488 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 8247. Up to 4062 conditions per place. [2023-09-01 03:09:48,293 INFO L137 encePairwiseOnDemand]: 323/325 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 03:09:48,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 171 flow [2023-09-01 03:09:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-09-01 03:09:48,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-09-01 03:09:48,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-09-01 03:09:48,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-09-01 03:09:48,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:48,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-09-01 03:09:48,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:48,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:48,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:48,301 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 99 flow. Second operand 3 states and 457 transitions. [2023-09-01 03:09:48,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 171 flow [2023-09-01 03:09:48,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:48,302 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 98 flow [2023-09-01 03:09:48,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-09-01 03:09:48,303 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-09-01 03:09:48,303 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 98 flow [2023-09-01 03:09:48,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:48,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:48,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:09:48,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:48,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:48,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:48,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash 765816, now seen corresponding path program 1 times [2023-09-01 03:09:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30921163] [2023-09-01 03:09:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:48,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:48,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:09:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:09:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:48,712 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:09:48,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:09:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:09:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:48,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30921163] [2023-09-01 03:09:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30921163] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:09:48,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:09:48,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:09:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478037339] [2023-09-01 03:09:48,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:09:48,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:09:48,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:09:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:09:49,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-09-01 03:09:49,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:49,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:49,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-09-01 03:09:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:50,681 INFO L130 PetriNetUnfolder]: 4681/6166 cut-off events. [2023-09-01 03:09:50,682 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 03:09:50,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12347 conditions, 6166 events. 4681/6166 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 29403 event pairs, 2226 based on Foata normal form. 0/1998 useless extension candidates. Maximal degree in co-relation 12337. Up to 2030 conditions per place. [2023-09-01 03:09:50,726 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 101 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2023-09-01 03:09:50,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 111 transitions, 474 flow [2023-09-01 03:09:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:09:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:09:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 921 transitions. [2023-09-01 03:09:50,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723076923076923 [2023-09-01 03:09:50,731 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 921 transitions. [2023-09-01 03:09:50,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 921 transitions. [2023-09-01 03:09:50,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:50,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 921 transitions. [2023-09-01 03:09:50,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.5) internal successors, (921), 6 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,739 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,741 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 98 flow. Second operand 6 states and 921 transitions. [2023-09-01 03:09:50,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 111 transitions, 474 flow [2023-09-01 03:09:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 111 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:50,746 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2023-09-01 03:09:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-09-01 03:09:50,747 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-09-01 03:09:50,748 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2023-09-01 03:09:50,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:50,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:50,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:09:50,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:50,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:50,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 23748567, now seen corresponding path program 1 times [2023-09-01 03:09:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618896306] [2023-09-01 03:09:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:50,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:50,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:09:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:09:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:51,104 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:09:51,105 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-09-01 03:09:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:51,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:51,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:51,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618896306] [2023-09-01 03:09:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618896306] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:51,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129545200] [2023-09-01 03:09:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:51,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:51,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-09-01 03:09:51,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:51,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:51,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-09-01 03:09:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:51,991 INFO L130 PetriNetUnfolder]: 4440/5835 cut-off events. [2023-09-01 03:09:51,991 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 03:09:52,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 5835 events. 4440/5835 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 27722 event pairs, 2103 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 11698. Up to 5745 conditions per place. [2023-09-01 03:09:52,026 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 03:09:52,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 227 flow [2023-09-01 03:09:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-09-01 03:09:52,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676923076923077 [2023-09-01 03:09:52,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-09-01 03:09:52,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-09-01 03:09:52,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:52,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-09-01 03:09:52,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:52,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:52,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:52,033 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 3 states and 456 transitions. [2023-09-01 03:09:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 227 flow [2023-09-01 03:09:52,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 43 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:52,035 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 139 flow [2023-09-01 03:09:52,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-09-01 03:09:52,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-09-01 03:09:52,036 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 139 flow [2023-09-01 03:09:52,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:52,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:09:52,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:52,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:52,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 23748568, now seen corresponding path program 1 times [2023-09-01 03:09:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:52,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585378962] [2023-09-01 03:09:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:52,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:52,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:52,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:52,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:09:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:09:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:09:52,409 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 03:09:52,410 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 03:09:52,434 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 42 treesize of output 38 [2023-09-01 03:09:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:52,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:52,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:52,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585378962] [2023-09-01 03:09:52,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585378962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:52,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:52,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:09:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954494585] [2023-09-01 03:09:52,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:52,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:09:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:52,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:09:52,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:09:52,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-09-01 03:09:52,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:52,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:52,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-09-01 03:09:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:53,310 INFO L130 PetriNetUnfolder]: 4179/5484 cut-off events. [2023-09-01 03:09:53,310 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 03:09:53,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11008 conditions, 5484 events. 4179/5484 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 25819 event pairs, 1974 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 10992. Up to 5394 conditions per place. [2023-09-01 03:09:53,345 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 03:09:53,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 41 transitions, 211 flow [2023-09-01 03:09:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:09:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:09:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-09-01 03:09:53,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687179487179487 [2023-09-01 03:09:53,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-09-01 03:09:53,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-09-01 03:09:53,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:53,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-09-01 03:09:53,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:53,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:53,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:53,352 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 139 flow. Second operand 3 states and 457 transitions. [2023-09-01 03:09:53,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 41 transitions, 211 flow [2023-09-01 03:09:53,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:53,355 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 136 flow [2023-09-01 03:09:53,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-09-01 03:09:53,357 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-09-01 03:09:53,357 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 136 flow [2023-09-01 03:09:53,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:53,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:53,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:09:53,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:53,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:53,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:53,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 736200986, now seen corresponding path program 1 times [2023-09-01 03:09:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598750491] [2023-09-01 03:09:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:53,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:53,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:53,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:09:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:09:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:53,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:09:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:09:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:53,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:53,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:53,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598750491] [2023-09-01 03:09:53,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598750491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:53,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:53,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:09:53,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973736431] [2023-09-01 03:09:53,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:53,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:09:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:53,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:09:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:09:54,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-09-01 03:09:54,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:54,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:54,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-09-01 03:09:54,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:55,009 INFO L130 PetriNetUnfolder]: 6348/8517 cut-off events. [2023-09-01 03:09:55,010 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 03:09:55,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17138 conditions, 8517 events. 6348/8517 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 44177 event pairs, 1608 based on Foata normal form. 0/3141 useless extension candidates. Maximal degree in co-relation 17121. Up to 4856 conditions per place. [2023-09-01 03:09:55,048 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 59 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-09-01 03:09:55,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 323 flow [2023-09-01 03:09:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:09:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:09:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-09-01 03:09:55,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-09-01 03:09:55,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-09-01 03:09:55,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-09-01 03:09:55,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:55,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-09-01 03:09:55,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 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) [2023-09-01 03:09:55,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,057 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 136 flow. Second operand 5 states and 735 transitions. [2023-09-01 03:09:55,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 323 flow [2023-09-01 03:09:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:09:55,059 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 155 flow [2023-09-01 03:09:55,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-09-01 03:09:55,061 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-09-01 03:09:55,061 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 155 flow [2023-09-01 03:09:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:55,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:09:55,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:55,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:55,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:55,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 736200985, now seen corresponding path program 1 times [2023-09-01 03:09:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114871807] [2023-09-01 03:09:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:09:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:55,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:55,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:09:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:09:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:09:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:55,409 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:09:55,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:09:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:55,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:09:55,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114871807] [2023-09-01 03:09:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114871807] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:09:55,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:09:55,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:09:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980469217] [2023-09-01 03:09:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:09:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:09:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:09:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:09:55,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-09-01 03:09:55,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:55,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:55,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-09-01 03:09:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:09:56,110 INFO L130 PetriNetUnfolder]: 2646/3708 cut-off events. [2023-09-01 03:09:56,111 INFO L131 PetriNetUnfolder]: For 304/433 co-relation queries the response was YES. [2023-09-01 03:09:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 3708 events. 2646/3708 cut-off events. For 304/433 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 18583 event pairs, 1431 based on Foata normal form. 129/2001 useless extension candidates. Maximal degree in co-relation 7991. Up to 3629 conditions per place. [2023-09-01 03:09:56,130 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 32 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-09-01 03:09:56,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 39 transitions, 221 flow [2023-09-01 03:09:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:09:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:09:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-09-01 03:09:56,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-09-01 03:09:56,133 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-09-01 03:09:56,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-09-01 03:09:56,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:09:56,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-09-01 03:09:56,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:56,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:56,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:56,137 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 155 flow. Second operand 4 states and 572 transitions. [2023-09-01 03:09:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 39 transitions, 221 flow [2023-09-01 03:09:56,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:09:56,139 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-09-01 03:09:56,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-09-01 03:09:56,140 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-09-01 03:09:56,140 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-09-01 03:09:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:56,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:09:56,141 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:09:56,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:09:56,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:56,351 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:09:56,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:09:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1341642493, now seen corresponding path program 2 times [2023-09-01 03:09:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:09:56,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357603174] [2023-09-01 03:09:56,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:09:56,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:09:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:09:56,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:09:56,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:09:56,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:09:56,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:09:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:09:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:09:56,542 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:09:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:09:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:56,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:09:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:09:57,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:09:57,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357603174] [2023-09-01 03:09:57,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357603174] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:09:57,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:09:57,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:09:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426240379] [2023-09-01 03:09:57,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:09:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:09:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:09:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:09:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:09:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-09-01 03:09:59,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:09:59,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:09:59,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-09-01 03:09:59,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:03,998 INFO L130 PetriNetUnfolder]: 8767/12299 cut-off events. [2023-09-01 03:10:03,998 INFO L131 PetriNetUnfolder]: For 999/1438 co-relation queries the response was YES. [2023-09-01 03:10:04,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26044 conditions, 12299 events. 8767/12299 cut-off events. For 999/1438 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 70412 event pairs, 4743 based on Foata normal form. 445/6867 useless extension candidates. Maximal degree in co-relation 26025. Up to 1420 conditions per place. [2023-09-01 03:10:04,067 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 272 selfloop transitions, 12 changer transitions 0/287 dead transitions. [2023-09-01 03:10:04,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 287 transitions, 1391 flow [2023-09-01 03:10:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:10:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:10:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1912 transitions. [2023-09-01 03:10:04,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49025641025641026 [2023-09-01 03:10:04,075 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1912 transitions. [2023-09-01 03:10:04,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1912 transitions. [2023-09-01 03:10:04,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:04,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1912 transitions. [2023-09-01 03:10:04,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.33333333333334) internal successors, (1912), 12 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:04,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:04,092 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:04,092 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 12 states and 1912 transitions. [2023-09-01 03:10:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 287 transitions, 1391 flow [2023-09-01 03:10:04,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 287 transitions, 1378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:10:04,099 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 241 flow [2023-09-01 03:10:04,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=241, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-09-01 03:10:04,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-09-01 03:10:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 241 flow [2023-09-01 03:10:04,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.0) internal successors, (1644), 12 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:04,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:04,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:10:04,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:04,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:04,313 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:04,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553975, now seen corresponding path program 1 times [2023-09-01 03:10:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598078204] [2023-09-01 03:10:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:04,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:04,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:04,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:04,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:10:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:04,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:10:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:04,470 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-09-01 03:10:04,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-09-01 03:10:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:04,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:04,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:04,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598078204] [2023-09-01 03:10:04,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598078204] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:04,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:04,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:10:04,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179370286] [2023-09-01 03:10:04,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:04,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:10:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:04,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:10:04,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:10:04,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-09-01 03:10:04,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:04,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:04,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-09-01 03:10:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:05,578 INFO L130 PetriNetUnfolder]: 8222/11474 cut-off events. [2023-09-01 03:10:05,578 INFO L131 PetriNetUnfolder]: For 912/1302 co-relation queries the response was YES. [2023-09-01 03:10:05,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24321 conditions, 11474 events. 8222/11474 cut-off events. For 912/1302 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65021 event pairs, 4430 based on Foata normal form. 390/6314 useless extension candidates. Maximal degree in co-relation 24295. Up to 11234 conditions per place. [2023-09-01 03:10:05,636 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 03:10:05,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 319 flow [2023-09-01 03:10:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:10:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:10:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-09-01 03:10:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512820512820513 [2023-09-01 03:10:05,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-09-01 03:10:05,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-09-01 03:10:05,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:05,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-09-01 03:10:05,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:05,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:05,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:05,641 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 241 flow. Second operand 3 states and 440 transitions. [2023-09-01 03:10:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 319 flow [2023-09-01 03:10:05,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 294 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:10:05,644 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 214 flow [2023-09-01 03:10:05,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-09-01 03:10:05,645 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-09-01 03:10:05,645 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 214 flow [2023-09-01 03:10:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:05,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:10:05,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:05,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:05,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1347553976, now seen corresponding path program 1 times [2023-09-01 03:10:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296399598] [2023-09-01 03:10:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:05,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:05,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:05,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:10:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:10:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:10:06,040 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 03:10:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 03:10:06,067 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 130 treesize of output 126 [2023-09-01 03:10:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:06,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:06,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296399598] [2023-09-01 03:10:06,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296399598] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:06,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:06,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:10:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272887020] [2023-09-01 03:10:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:10:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:10:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:10:06,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-09-01 03:10:06,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:06,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:06,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-09-01 03:10:06,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:07,247 INFO L130 PetriNetUnfolder]: 7632/10604 cut-off events. [2023-09-01 03:10:07,247 INFO L131 PetriNetUnfolder]: For 838/1188 co-relation queries the response was YES. [2023-09-01 03:10:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 10604 events. 7632/10604 cut-off events. For 838/1188 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59078 event pairs, 4090 based on Foata normal form. 350/5974 useless extension candidates. Maximal degree in co-relation 22417. Up to 10364 conditions per place. [2023-09-01 03:10:07,346 INFO L137 encePairwiseOnDemand]: 322/325 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 03:10:07,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 288 flow [2023-09-01 03:10:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:10:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:10:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-09-01 03:10:07,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-09-01 03:10:07,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-09-01 03:10:07,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-09-01 03:10:07,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:07,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-09-01 03:10:07,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:07,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:07,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:07,352 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 214 flow. Second operand 3 states and 450 transitions. [2023-09-01 03:10:07,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 288 flow [2023-09-01 03:10:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:10:07,355 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 211 flow [2023-09-01 03:10:07,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2023-09-01 03:10:07,356 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-09-01 03:10:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 211 flow [2023-09-01 03:10:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:07,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:07,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:10:07,365 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 [2023-09-01 03:10:07,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:07,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:07,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1347396625, now seen corresponding path program 1 times [2023-09-01 03:10:07,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:07,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096028317] [2023-09-01 03:10:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:07,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:07,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:07,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:07,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:10:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:10:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:07,723 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:07,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:07,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:07,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096028317] [2023-09-01 03:10:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096028317] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:07,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:07,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:10:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172200750] [2023-09-01 03:10:07,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:10:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:10:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:10:08,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-09-01 03:10:08,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:08,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:08,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-09-01 03:10:08,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:09,272 INFO L130 PetriNetUnfolder]: 8060/11214 cut-off events. [2023-09-01 03:10:09,272 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-09-01 03:10:09,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 11214 events. 8060/11214 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62059 event pairs, 4404 based on Foata normal form. 26/6339 useless extension candidates. Maximal degree in co-relation 23927. Up to 10733 conditions per place. [2023-09-01 03:10:09,324 INFO L137 encePairwiseOnDemand]: 318/325 looper letters, 64 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-09-01 03:10:09,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 418 flow [2023-09-01 03:10:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:10:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:10:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-09-01 03:10:09,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523076923076923 [2023-09-01 03:10:09,330 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-09-01 03:10:09,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-09-01 03:10:09,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:09,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-09-01 03:10:09,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 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) [2023-09-01 03:10:09,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:09,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:09,334 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 211 flow. Second operand 5 states and 735 transitions. [2023-09-01 03:10:09,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 418 flow [2023-09-01 03:10:09,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:10:09,338 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 249 flow [2023-09-01 03:10:09,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-09-01 03:10:09,339 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-09-01 03:10:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 249 flow [2023-09-01 03:10:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:09,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:09,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:09,549 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:09,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1175503872, now seen corresponding path program 1 times [2023-09-01 03:10:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:09,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692856371] [2023-09-01 03:10:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:09,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:09,551 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:09,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:10:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:10:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:09,703 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:09,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:09,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:09,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692856371] [2023-09-01 03:10:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692856371] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:10:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129994256] [2023-09-01 03:10:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:09,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:10:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:10:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:10:10,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 325 [2023-09-01 03:10:10,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:10,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:10,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 325 [2023-09-01 03:10:10,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:11,701 INFO L130 PetriNetUnfolder]: 11300/15840 cut-off events. [2023-09-01 03:10:11,702 INFO L131 PetriNetUnfolder]: For 10344/10849 co-relation queries the response was YES. [2023-09-01 03:10:11,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41480 conditions, 15840 events. 11300/15840 cut-off events. For 10344/10849 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 95665 event pairs, 4697 based on Foata normal form. 504/13019 useless extension candidates. Maximal degree in co-relation 41448. Up to 10233 conditions per place. [2023-09-01 03:10:11,792 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 51 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-09-01 03:10:11,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 423 flow [2023-09-01 03:10:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:10:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:10:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-09-01 03:10:11,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393846153846154 [2023-09-01 03:10:11,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-09-01 03:10:11,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-09-01 03:10:11,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:11,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-09-01 03:10:11,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:11,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:11,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:11,799 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 249 flow. Second operand 5 states and 714 transitions. [2023-09-01 03:10:11,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 423 flow [2023-09-01 03:10:11,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 413 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:10:11,803 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 267 flow [2023-09-01 03:10:11,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-09-01 03:10:11,804 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-09-01 03:10:11,804 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 267 flow [2023-09-01 03:10:11,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:11,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:11,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:11,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:12,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:12,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:12,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1352999476, now seen corresponding path program 1 times [2023-09-01 03:10:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:12,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095963949] [2023-09-01 03:10:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:12,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:12,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:12,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:10:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:10:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:12,189 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:12,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:10:12,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:10:12,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095963949] [2023-09-01 03:10:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095963949] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:12,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:10:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238729968] [2023-09-01 03:10:12,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:12,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:10:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:10:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:10:14,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-09-01 03:10:14,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:14,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:14,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-09-01 03:10:14,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:17,050 INFO L130 PetriNetUnfolder]: 16800/23217 cut-off events. [2023-09-01 03:10:17,050 INFO L131 PetriNetUnfolder]: For 23348/25607 co-relation queries the response was YES. [2023-09-01 03:10:17,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64998 conditions, 23217 events. 16800/23217 cut-off events. For 23348/25607 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 145647 event pairs, 2153 based on Foata normal form. 2139/22212 useless extension candidates. Maximal degree in co-relation 64965. Up to 6057 conditions per place. [2023-09-01 03:10:17,193 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 96 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2023-09-01 03:10:17,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 717 flow [2023-09-01 03:10:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:10:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:10:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1157 transitions. [2023-09-01 03:10:17,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-09-01 03:10:17,196 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1157 transitions. [2023-09-01 03:10:17,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1157 transitions. [2023-09-01 03:10:17,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:17,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1157 transitions. [2023-09-01 03:10:17,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:17,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:17,201 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:17,201 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 267 flow. Second operand 8 states and 1157 transitions. [2023-09-01 03:10:17,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 717 flow [2023-09-01 03:10:17,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:10:17,207 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 327 flow [2023-09-01 03:10:17,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-09-01 03:10:17,207 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2023-09-01 03:10:17,207 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 327 flow [2023-09-01 03:10:17,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.4) internal successors, (1344), 10 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:17,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:17,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:17,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:17,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:17,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1293681852, now seen corresponding path program 1 times [2023-09-01 03:10:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805323277] [2023-09-01 03:10:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:17,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:17,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:17,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:17,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:10:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:10:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:17,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:10:17,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:10:18,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:18,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805323277] [2023-09-01 03:10:18,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805323277] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:18,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:18,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:10:18,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994541966] [2023-09-01 03:10:18,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:18,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:10:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:10:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:10:20,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-09-01 03:10:20,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:20,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:20,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-09-01 03:10:20,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:26,515 INFO L130 PetriNetUnfolder]: 34898/46998 cut-off events. [2023-09-01 03:10:26,516 INFO L131 PetriNetUnfolder]: For 70209/71264 co-relation queries the response was YES. [2023-09-01 03:10:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151260 conditions, 46998 events. 34898/46998 cut-off events. For 70209/71264 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 296523 event pairs, 5669 based on Foata normal form. 4321/46085 useless extension candidates. Maximal degree in co-relation 151223. Up to 12744 conditions per place. [2023-09-01 03:10:26,977 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 117 selfloop transitions, 13 changer transitions 0/133 dead transitions. [2023-09-01 03:10:26,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 995 flow [2023-09-01 03:10:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:10:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:10:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1137 transitions. [2023-09-01 03:10:26,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373076923076923 [2023-09-01 03:10:26,980 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1137 transitions. [2023-09-01 03:10:26,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1137 transitions. [2023-09-01 03:10:26,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:26,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1137 transitions. [2023-09-01 03:10:26,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.125) internal successors, (1137), 8 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:26,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:26,987 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:26,987 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 327 flow. Second operand 8 states and 1137 transitions. [2023-09-01 03:10:26,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 995 flow [2023-09-01 03:10:27,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 941 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 03:10:27,045 INFO L231 Difference]: Finished difference. Result has 88 places, 55 transitions, 392 flow [2023-09-01 03:10:27,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=88, PETRI_TRANSITIONS=55} [2023-09-01 03:10:27,046 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2023-09-01 03:10:27,046 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 55 transitions, 392 flow [2023-09-01 03:10:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.8) internal successors, (1328), 10 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:27,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:27,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:27,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-09-01 03:10:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:27,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:27,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -78301802, now seen corresponding path program 1 times [2023-09-01 03:10:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:27,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822036563] [2023-09-01 03:10:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:27,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:27,250 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:27,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:10:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:10:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:27,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:10:27,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822036563] [2023-09-01 03:10:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822036563] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:10:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:10:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:10:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407471171] [2023-09-01 03:10:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:10:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:10:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:10:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:10:27,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-09-01 03:10:27,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 55 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:27,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:27,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-09-01 03:10:27,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:32,714 INFO L130 PetriNetUnfolder]: 28139/39191 cut-off events. [2023-09-01 03:10:32,714 INFO L131 PetriNetUnfolder]: For 123215/127518 co-relation queries the response was YES. [2023-09-01 03:10:32,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147649 conditions, 39191 events. 28139/39191 cut-off events. For 123215/127518 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 236003 event pairs, 19691 based on Foata normal form. 4302/40943 useless extension candidates. Maximal degree in co-relation 147608. Up to 38858 conditions per place. [2023-09-01 03:10:33,101 INFO L137 encePairwiseOnDemand]: 320/325 looper letters, 71 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-09-01 03:10:33,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 612 flow [2023-09-01 03:10:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:10:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:10:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2023-09-01 03:10:33,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45353846153846156 [2023-09-01 03:10:33,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2023-09-01 03:10:33,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2023-09-01 03:10:33,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:33,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2023-09-01 03:10:33,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:33,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:33,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:33,106 INFO L175 Difference]: Start difference. First operand has 88 places, 55 transitions, 392 flow. Second operand 5 states and 737 transitions. [2023-09-01 03:10:33,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 612 flow [2023-09-01 03:10:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 595 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 03:10:33,218 INFO L231 Difference]: Finished difference. Result has 91 places, 56 transitions, 392 flow [2023-09-01 03:10:33,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=91, PETRI_TRANSITIONS=56} [2023-09-01 03:10:33,219 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2023-09-01 03:10:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 56 transitions, 392 flow [2023-09-01 03:10:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:33,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:33,434 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:33,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1453874683, now seen corresponding path program 1 times [2023-09-01 03:10:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:33,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743013714] [2023-09-01 03:10:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:10:33,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:33,436 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:33,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:10:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:10:33,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:10:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:33,607 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:33,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:33,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:34,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743013714] [2023-09-01 03:10:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743013714] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:34,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:10:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985056531] [2023-09-01 03:10:34,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:10:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:10:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:10:38,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-09-01 03:10:38,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 56 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:38,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:38,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-09-01 03:10:38,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:10:48,424 INFO L130 PetriNetUnfolder]: 29193/40489 cut-off events. [2023-09-01 03:10:48,424 INFO L131 PetriNetUnfolder]: For 119360/123737 co-relation queries the response was YES. [2023-09-01 03:10:48,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152081 conditions, 40489 events. 29193/40489 cut-off events. For 119360/123737 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 245131 event pairs, 13907 based on Foata normal form. 5124/45355 useless extension candidates. Maximal degree in co-relation 152038. Up to 20281 conditions per place. [2023-09-01 03:10:48,890 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 196 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2023-09-01 03:10:48,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 217 transitions, 1703 flow [2023-09-01 03:10:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:10:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:10:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1915 transitions. [2023-09-01 03:10:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208791208791209 [2023-09-01 03:10:48,897 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1915 transitions. [2023-09-01 03:10:48,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1915 transitions. [2023-09-01 03:10:48,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:10:48,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1915 transitions. [2023-09-01 03:10:48,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.78571428571428) internal successors, (1915), 14 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:48,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:48,906 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:48,906 INFO L175 Difference]: Start difference. First operand has 91 places, 56 transitions, 392 flow. Second operand 14 states and 1915 transitions. [2023-09-01 03:10:48,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 217 transitions, 1703 flow [2023-09-01 03:10:49,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 217 transitions, 1698 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:10:49,116 INFO L231 Difference]: Finished difference. Result has 106 places, 62 transitions, 478 flow [2023-09-01 03:10:49,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=478, PETRI_PLACES=106, PETRI_TRANSITIONS=62} [2023-09-01 03:10:49,116 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2023-09-01 03:10:49,116 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 62 transitions, 478 flow [2023-09-01 03:10:49,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:49,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:10:49,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:10:49,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:10:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:49,318 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:10:49,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:10:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1063204671, now seen corresponding path program 2 times [2023-09-01 03:10:49,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:10:49,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045057995] [2023-09-01 03:10:49,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:10:49,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:10:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:10:49,320 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:10:49,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:10:49,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:10:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:10:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:10:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:10:49,540 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:10:49,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:10:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:10:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:10:50,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:10:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045057995] [2023-09-01 03:10:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045057995] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:10:50,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:10:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 03:10:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006943348] [2023-09-01 03:10:50,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:10:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:10:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:10:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:10:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:10:58,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-09-01 03:10:58,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 62 transitions, 478 flow. Second operand has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:10:58,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:10:58,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-09-01 03:10:58,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:11,808 INFO L130 PetriNetUnfolder]: 31425/42833 cut-off events. [2023-09-01 03:11:11,808 INFO L131 PetriNetUnfolder]: For 155297/162220 co-relation queries the response was YES. [2023-09-01 03:11:12,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179906 conditions, 42833 events. 31425/42833 cut-off events. For 155297/162220 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 272237 event pairs, 8023 based on Foata normal form. 5711/48061 useless extension candidates. Maximal degree in co-relation 179859. Up to 14818 conditions per place. [2023-09-01 03:11:12,336 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 366 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2023-09-01 03:11:12,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 398 transitions, 3218 flow [2023-09-01 03:11:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 03:11:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 03:11:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3066 transitions. [2023-09-01 03:11:12,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288111888111888 [2023-09-01 03:11:12,347 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3066 transitions. [2023-09-01 03:11:12,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3066 transitions. [2023-09-01 03:11:12,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3066 transitions. [2023-09-01 03:11:12,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 139.36363636363637) internal successors, (3066), 22 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:12,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:12,361 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 325.0) internal successors, (7475), 23 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:12,361 INFO L175 Difference]: Start difference. First operand has 106 places, 62 transitions, 478 flow. Second operand 22 states and 3066 transitions. [2023-09-01 03:11:12,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 398 transitions, 3218 flow [2023-09-01 03:11:12,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 398 transitions, 3158 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-09-01 03:11:12,681 INFO L231 Difference]: Finished difference. Result has 121 places, 79 transitions, 617 flow [2023-09-01 03:11:12,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=617, PETRI_PLACES=121, PETRI_TRANSITIONS=79} [2023-09-01 03:11:12,682 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2023-09-01 03:11:12,682 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 79 transitions, 617 flow [2023-09-01 03:11:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.11111111111111) internal successors, (2306), 18 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:12,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:12,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:11:12,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:12,885 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:11:12,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1368264792, now seen corresponding path program 1 times [2023-09-01 03:11:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:12,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58791658] [2023-09-01 03:11:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:11:12,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:12,886 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:12,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:11:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:11:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:11:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:13,081 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:11:13,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:11:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:13,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:15,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58791658] [2023-09-01 03:11:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58791658] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:15,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:11:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:11:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699345815] [2023-09-01 03:11:15,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:15,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:11:15,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:11:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:11:23,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 325 [2023-09-01 03:11:23,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 79 transitions, 617 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:23,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:23,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 325 [2023-09-01 03:11:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:11:38,982 INFO L130 PetriNetUnfolder]: 36552/50332 cut-off events. [2023-09-01 03:11:38,983 INFO L131 PetriNetUnfolder]: For 202290/207962 co-relation queries the response was YES. [2023-09-01 03:11:39,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220240 conditions, 50332 events. 36552/50332 cut-off events. For 202290/207962 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 314379 event pairs, 13719 based on Foata normal form. 6137/56227 useless extension candidates. Maximal degree in co-relation 220193. Up to 13528 conditions per place. [2023-09-01 03:11:39,653 INFO L137 encePairwiseOnDemand]: 317/325 looper letters, 403 selfloop transitions, 37 changer transitions 0/445 dead transitions. [2023-09-01 03:11:39,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 445 transitions, 4001 flow [2023-09-01 03:11:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 03:11:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 03:11:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3138 transitions. [2023-09-01 03:11:39,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41979933110367895 [2023-09-01 03:11:39,658 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3138 transitions. [2023-09-01 03:11:39,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3138 transitions. [2023-09-01 03:11:39,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:11:39,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3138 transitions. [2023-09-01 03:11:39,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 136.43478260869566) internal successors, (3138), 23 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:39,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:39,668 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 325.0) internal successors, (7800), 24 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:39,669 INFO L175 Difference]: Start difference. First operand has 121 places, 79 transitions, 617 flow. Second operand 23 states and 3138 transitions. [2023-09-01 03:11:39,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 445 transitions, 4001 flow [2023-09-01 03:11:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 445 transitions, 3802 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-09-01 03:11:40,201 INFO L231 Difference]: Finished difference. Result has 144 places, 98 transitions, 824 flow [2023-09-01 03:11:40,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=824, PETRI_PLACES=144, PETRI_TRANSITIONS=98} [2023-09-01 03:11:40,201 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2023-09-01 03:11:40,201 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 98 transitions, 824 flow [2023-09-01 03:11:40,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:40,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:40,202 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:11:40,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-09-01 03:11:40,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:40,403 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:11:40,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 940733725, now seen corresponding path program 3 times [2023-09-01 03:11:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:11:40,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881124043] [2023-09-01 03:11:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:11:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:11:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:11:40,405 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:11:40,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:11:40,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:11:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:11:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:11:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:40,697 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:11:40,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:11:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:41,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:43,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:11:43,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881124043] [2023-09-01 03:11:43,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881124043] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:43,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:11:43,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:11:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400627631] [2023-09-01 03:11:43,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:11:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:11:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:11:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:11:56,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 325 [2023-09-01 03:11:56,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 98 transitions, 824 flow. Second operand has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:56,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:56,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 325 [2023-09-01 03:11:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:29,253 INFO L130 PetriNetUnfolder]: 75849/103092 cut-off events. [2023-09-01 03:12:29,253 INFO L131 PetriNetUnfolder]: For 685350/703533 co-relation queries the response was YES. [2023-09-01 03:12:30,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527494 conditions, 103092 events. 75849/103092 cut-off events. For 685350/703533 co-relation queries the response was YES. Maximal size of possible extension queue 2504. Compared 664603 event pairs, 47074 based on Foata normal form. 12412/114867 useless extension candidates. Maximal degree in co-relation 527440. Up to 27419 conditions per place. [2023-09-01 03:12:31,030 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 750 selfloop transitions, 24 changer transitions 0/785 dead transitions. [2023-09-01 03:12:31,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 785 transitions, 6972 flow [2023-09-01 03:12:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:12:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:12:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3777 transitions. [2023-09-01 03:12:31,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48423076923076924 [2023-09-01 03:12:31,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3777 transitions. [2023-09-01 03:12:31,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3777 transitions. [2023-09-01 03:12:31,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:31,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3777 transitions. [2023-09-01 03:12:31,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.375) internal successors, (3777), 24 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:31,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:31,044 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:31,044 INFO L175 Difference]: Start difference. First operand has 144 places, 98 transitions, 824 flow. Second operand 24 states and 3777 transitions. [2023-09-01 03:12:31,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 785 transitions, 6972 flow [2023-09-01 03:12:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 785 transitions, 6887 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-09-01 03:12:37,873 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 938 flow [2023-09-01 03:12:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=938, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2023-09-01 03:12:37,874 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2023-09-01 03:12:37,874 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 938 flow [2023-09-01 03:12:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:37,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-09-01 03:12:37,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:12:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:38,076 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:12:38,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2142395825, now seen corresponding path program 3 times [2023-09-01 03:12:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309030019] [2023-09-01 03:12:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:12:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:38,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:12:38,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:12:38,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 03:12:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:12:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:12:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:38,509 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:12:38,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:12:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:38,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:12:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:40,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:40,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309030019] [2023-09-01 03:12:40,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309030019] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:12:40,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:12:40,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-09-01 03:12:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134399566] [2023-09-01 03:12:40,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:12:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:12:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:12:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:12:51,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-09-01 03:12:51,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 938 flow. Second operand has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:51,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:51,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-09-01 03:12:51,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:19,298 INFO L130 PetriNetUnfolder]: 81245/110531 cut-off events. [2023-09-01 03:13:19,298 INFO L131 PetriNetUnfolder]: For 713667/730534 co-relation queries the response was YES. [2023-09-01 03:13:20,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559228 conditions, 110531 events. 81245/110531 cut-off events. For 713667/730534 co-relation queries the response was YES. Maximal size of possible extension queue 2714. Compared 725465 event pairs, 39973 based on Foata normal form. 12758/121362 useless extension candidates. Maximal degree in co-relation 559163. Up to 81581 conditions per place. [2023-09-01 03:13:21,485 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 520 selfloop transitions, 48 changer transitions 0/575 dead transitions. [2023-09-01 03:13:21,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 575 transitions, 5014 flow [2023-09-01 03:13:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:13:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:13:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3617 transitions. [2023-09-01 03:13:21,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516923076923076 [2023-09-01 03:13:21,490 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3617 transitions. [2023-09-01 03:13:21,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3617 transitions. [2023-09-01 03:13:21,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:21,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3617 transitions. [2023-09-01 03:13:21,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 144.68) internal successors, (3617), 25 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:21,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:21,498 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 325.0) internal successors, (8450), 26 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:21,498 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 938 flow. Second operand 25 states and 3617 transitions. [2023-09-01 03:13:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 575 transitions, 5014 flow [2023-09-01 03:13:32,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 575 transitions, 4966 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 03:13:32,227 INFO L231 Difference]: Finished difference. Result has 194 places, 138 transitions, 1339 flow [2023-09-01 03:13:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1339, PETRI_PLACES=194, PETRI_TRANSITIONS=138} [2023-09-01 03:13:32,228 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 143 predicate places. [2023-09-01 03:13:32,228 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 138 transitions, 1339 flow [2023-09-01 03:13:32,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.14285714285714) internal successors, (2775), 21 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:32,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:32,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:32,239 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 (23)] Ended with exit code 0 [2023-09-01 03:13:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:32,433 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:13:32,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1336985445, now seen corresponding path program 2 times [2023-09-01 03:13:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626600779] [2023-09-01 03:13:32,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:13:32,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:13:32,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:32,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:13:32,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:13:32,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:13:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:13:32,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:13:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:32,720 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:13:32,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:13:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:32,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:13:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:33,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:33,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626600779] [2023-09-01 03:13:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626600779] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:13:33,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:13:33,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 03:13:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127357265] [2023-09-01 03:13:33,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:13:33,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 03:13:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 03:13:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-09-01 03:13:42,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-09-01 03:13:42,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 138 transitions, 1339 flow. Second operand has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:42,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:42,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-09-01 03:13:42,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:12,998 INFO L130 PetriNetUnfolder]: 91935/125106 cut-off events. [2023-09-01 03:14:12,998 INFO L131 PetriNetUnfolder]: For 1082214/1097059 co-relation queries the response was YES. [2023-09-01 03:14:15,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702607 conditions, 125106 events. 91935/125106 cut-off events. For 1082214/1097059 co-relation queries the response was YES. Maximal size of possible extension queue 3106. Compared 833546 event pairs, 50648 based on Foata normal form. 8041/131867 useless extension candidates. Maximal degree in co-relation 702532. Up to 102790 conditions per place. [2023-09-01 03:14:16,418 INFO L137 encePairwiseOnDemand]: 316/325 looper letters, 412 selfloop transitions, 35 changer transitions 0/459 dead transitions. [2023-09-01 03:14:16,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 4669 flow [2023-09-01 03:14:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 03:14:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 03:14:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2581 transitions. [2023-09-01 03:14:16,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411965811965812 [2023-09-01 03:14:16,425 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2581 transitions. [2023-09-01 03:14:16,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2581 transitions. [2023-09-01 03:14:16,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:16,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2581 transitions. [2023-09-01 03:14:16,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.38888888888889) internal successors, (2581), 18 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,436 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:16,436 INFO L175 Difference]: Start difference. First operand has 194 places, 138 transitions, 1339 flow. Second operand 18 states and 2581 transitions. [2023-09-01 03:14:16,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 4669 flow [2023-09-01 03:14:24,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 459 transitions, 4412 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-09-01 03:14:24,841 INFO L231 Difference]: Finished difference. Result has 209 places, 154 transitions, 1551 flow [2023-09-01 03:14:24,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1551, PETRI_PLACES=209, PETRI_TRANSITIONS=154} [2023-09-01 03:14:24,842 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-09-01 03:14:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 154 transitions, 1551 flow [2023-09-01 03:14:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:24,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:24,843 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-09-01 03:14:24,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:14:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:25,044 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:14:25,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1278902246, now seen corresponding path program 4 times [2023-09-01 03:14:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513925960] [2023-09-01 03:14:25,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:14:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:14:25,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:25,046 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:14:25,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 03:14:25,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:14:25,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:14:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:14:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:25,264 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:14:25,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:14:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:14:25,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:14:26,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513925960] [2023-09-01 03:14:26,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513925960] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:26,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:26,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:14:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109641116] [2023-09-01 03:14:26,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:26,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:14:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:14:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:14:32,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-09-01 03:14:32,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 154 transitions, 1551 flow. Second operand has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:32,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:32,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-09-01 03:14:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:31,542 INFO L130 PetriNetUnfolder]: 181718/248622 cut-off events. [2023-09-01 03:15:31,542 INFO L131 PetriNetUnfolder]: For 3179601/3223940 co-relation queries the response was YES. [2023-09-01 03:15:36,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477904 conditions, 248622 events. 181718/248622 cut-off events. For 3179601/3223940 co-relation queries the response was YES. Maximal size of possible extension queue 5742. Compared 1834813 event pairs, 10288 based on Foata normal form. 37218/285506 useless extension candidates. Maximal degree in co-relation 1477823. Up to 62627 conditions per place. [2023-09-01 03:15:37,837 INFO L137 encePairwiseOnDemand]: 319/325 looper letters, 510 selfloop transitions, 46 changer transitions 0/566 dead transitions. [2023-09-01 03:15:37,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 566 transitions, 6572 flow [2023-09-01 03:15:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:15:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:15:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2078 transitions. [2023-09-01 03:15:37,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567032967032967 [2023-09-01 03:15:37,840 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2078 transitions. [2023-09-01 03:15:37,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2078 transitions. [2023-09-01 03:15:37,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:37,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2078 transitions. [2023-09-01 03:15:37,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.42857142857142) internal successors, (2078), 14 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:37,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:37,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 325.0) internal successors, (4875), 15 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:37,845 INFO L175 Difference]: Start difference. First operand has 209 places, 154 transitions, 1551 flow. Second operand 14 states and 2078 transitions. [2023-09-01 03:15:37,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 566 transitions, 6572 flow [2023-09-01 03:15:50,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 566 transitions, 6479 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-09-01 03:15:50,576 INFO L231 Difference]: Finished difference. Result has 225 places, 162 transitions, 1751 flow [2023-09-01 03:15:50,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1751, PETRI_PLACES=225, PETRI_TRANSITIONS=162} [2023-09-01 03:15:50,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2023-09-01 03:15:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 162 transitions, 1751 flow [2023-09-01 03:15:50,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 134.25) internal successors, (2148), 16 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:50,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:50,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:15:50,586 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 (25)] Ended with exit code 0 [2023-09-01 03:15:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:50,778 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:15:50,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash -888232234, now seen corresponding path program 2 times [2023-09-01 03:15:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416618916] [2023-09-01 03:15:50,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:15:50,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:15:50,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:50,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:15:50,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 03:15:50,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:15:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:15:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:15:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:50,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:15:50,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:15:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:15:51,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:15:51,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416618916] [2023-09-01 03:15:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416618916] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:15:51,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:15:51,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:15:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067135484] [2023-09-01 03:15:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:15:51,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:15:51,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:15:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:15:51,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 325 [2023-09-01 03:15:51,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 162 transitions, 1751 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:51,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:51,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 325 [2023-09-01 03:15:51,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:28,998 INFO L130 PetriNetUnfolder]: 132946/188244 cut-off events. [2023-09-01 03:16:28,998 INFO L131 PetriNetUnfolder]: For 2191848/2217500 co-relation queries the response was YES. [2023-09-01 03:16:33,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090818 conditions, 188244 events. 132946/188244 cut-off events. For 2191848/2217500 co-relation queries the response was YES. Maximal size of possible extension queue 3502. Compared 1366449 event pairs, 30532 based on Foata normal form. 32255/219507 useless extension candidates. Maximal degree in co-relation 1090729. Up to 127672 conditions per place. [2023-09-01 03:16:34,182 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 206 selfloop transitions, 16 changer transitions 0/232 dead transitions. [2023-09-01 03:16:34,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 232 transitions, 3038 flow [2023-09-01 03:16:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:16:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:16:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 702 transitions. [2023-09-01 03:16:34,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432 [2023-09-01 03:16:34,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 702 transitions. [2023-09-01 03:16:34,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 702 transitions. [2023-09-01 03:16:34,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:34,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 702 transitions. [2023-09-01 03:16:34,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:34,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:34,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:16:34,188 INFO L175 Difference]: Start difference. First operand has 225 places, 162 transitions, 1751 flow. Second operand 5 states and 702 transitions. [2023-09-01 03:16:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 232 transitions, 3038 flow [2023-09-01 03:17:03,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 232 transitions, 2858 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-09-01 03:17:03,087 INFO L231 Difference]: Finished difference. Result has 219 places, 161 transitions, 1667 flow [2023-09-01 03:17:03,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1667, PETRI_PLACES=219, PETRI_TRANSITIONS=161} [2023-09-01 03:17:03,087 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 168 predicate places. [2023-09-01 03:17:03,087 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 161 transitions, 1667 flow [2023-09-01 03:17:03,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:03,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:03,088 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:03,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:17:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:03,289 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-09-01 03:17:03,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1500945633, now seen corresponding path program 3 times [2023-09-01 03:17:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:03,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676376973] [2023-09-01 03:17:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:17:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:17:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:03,290 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:17:03,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 03:17:03,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 03:17:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:17:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:17:03,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:03,653 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:17:03,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:17:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:17:03,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:17:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:17:05,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676376973] [2023-09-01 03:17:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676376973] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:17:05,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:17:05,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-09-01 03:17:05,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454969026] [2023-09-01 03:17:05,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:17:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:17:05,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:17:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:17:17,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 325 [2023-09-01 03:17:17,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 161 transitions, 1667 flow. Second operand has 20 states, 20 states have (on average 131.4) internal successors, (2628), 20 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:17:17,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:17,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 325 [2023-09-01 03:17:17,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand