./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations 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-queue-add-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:47:07,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:47:07,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:47:07,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:47:07,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:47:07,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:47:07,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:47:07,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:47:07,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:47:07,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:47:07,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:47:07,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:47:07,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:47:07,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:47:07,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:47:07,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:47:07,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:47:07,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:47:07,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:47:07,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:47:07,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:47:07,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:47:07,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:47:07,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:47:07,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:47:07,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:47:07,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:47:07,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:47:07,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:47:07,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:47:07,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:47:07,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:47:07,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:47:07,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:47:07,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:47:07,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:47:07,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:47:07,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:47:07,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:47:07,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:47:07,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:47:07,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:47:07,840 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:47:07,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:47:07,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:47:07,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:47:07,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:47:07,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:47:07,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:47:07,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:47:07,844 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:47:07,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:47:07,845 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:47:07,845 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:47:07,846 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:47:07,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:47:07,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:47:07,847 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:47:07,847 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:47:07,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:47:07,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:47:07,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:47:07,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:07,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:47:07,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:47:07,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:47:07,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:47:07,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:47:07,849 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:47:07,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:47:07,849 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:47:07,850 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:47:08,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:47:08,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:47:08,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:47:08,197 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:47:08,197 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:47:08,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 03:47:09,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:47:09,643 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:47:09,644 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 03:47:09,656 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2187fed45/3f64519b49704af0b54bfc184a5c04db/FLAG5867eeef9 [2023-09-01 03:47:09,679 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2187fed45/3f64519b49704af0b54bfc184a5c04db [2023-09-01 03:47:09,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:47:09,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:47:09,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:09,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:47:09,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:47:09,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:09" (1/1) ... [2023-09-01 03:47:09,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368ebeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:09, skipping insertion in model container [2023-09-01 03:47:09,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:09" (1/1) ... [2023-09-01 03:47:09,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:47:09,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:09,888 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 03:47:09,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:09,906 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 03:47:09,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36822967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:09, skipping insertion in model container [2023-09-01 03:47:09,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:09,907 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:47:09,909 INFO L158 Benchmark]: Toolchain (without parser) took 224.42ms. Allocated memory is still 79.7MB. Free memory was 54.5MB in the beginning and 44.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:47:09,909 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:47:09,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.88ms. Allocated memory is still 79.7MB. Free memory was 54.3MB in the beginning and 44.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:47:09,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.88ms. Allocated memory is still 79.7MB. Free memory was 54.3MB in the beginning and 44.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:47:11,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:47:11,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:47:11,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:47:11,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:47:11,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:47:11,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:47:11,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:47:11,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:47:11,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:47:11,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:47:11,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:47:11,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:47:11,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:47:11,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:47:11,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:47:11,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:47:11,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:47:11,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:47:11,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:47:11,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:47:11,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:47:11,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:47:11,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:47:11,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:47:11,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:47:11,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:47:11,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:47:11,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:47:11,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:47:11,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:47:11,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:47:11,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:47:11,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:47:11,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:47:11,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:47:11,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:47:11,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:47:11,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:47:11,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:47:11,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:47:11,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:47:11,767 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:47:11,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:47:11,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:47:11,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:47:11,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:47:11,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:47:11,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:47:11,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:47:11,770 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:47:11,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:47:11,771 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:47:11,772 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:47:11,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:47:11,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:47:11,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:47:11,772 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:47:11,773 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:47:11,774 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:47:11,774 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:47:11,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:47:11,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:47:11,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:47:11,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:11,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:47:11,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:47:11,775 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:47:11,776 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:47:11,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:47:11,776 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:47:11,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:47:11,776 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:47:11,777 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:47:11,777 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:47:12,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:47:12,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:47:12,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:47:12,103 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:47:12,103 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:47:12,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 03:47:13,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:47:13,419 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:47:13,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 03:47:13,425 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca0c6b75/72dc2002e82d4d5a873681ba7ba9eb6a/FLAG276271c7a [2023-09-01 03:47:13,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca0c6b75/72dc2002e82d4d5a873681ba7ba9eb6a [2023-09-01 03:47:13,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:47:13,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:47:13,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:13,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:47:13,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:47:13,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69305405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13, skipping insertion in model container [2023-09-01 03:47:13,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:47:13,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:13,632 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 03:47:13,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:13,668 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:47:13,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:47:13,701 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 03:47:13,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:13,721 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:47:13,749 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 03:47:13,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:47:13,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:47:13,767 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:47:13,773 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:47:13,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13 WrapperNode [2023-09-01 03:47:13,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:47:13,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:47:13,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:47:13,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:47:13,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,832 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2023-09-01 03:47:13,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:47:13,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:47:13,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:47:13,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:47:13,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:47:13,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:47:13,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:47:13,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:47:13,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (1/1) ... [2023-09-01 03:47:13,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:47:13,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:47:13,967 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 03:47:13,983 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 03:47:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:47:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:47:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:47:14,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:47:14,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:47:14,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:47:14,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:47:14,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:47:14,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:47:14,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:47:14,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:47:14,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:47:14,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:47:14,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:47:14,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:47:14,012 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 03:47:14,120 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:47:14,122 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:47:14,555 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:47:14,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:47:14,713 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 03:47:14,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:47:14 BoogieIcfgContainer [2023-09-01 03:47:14,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:47:14,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:47:14,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:47:14,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:47:14,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:47:13" (1/3) ... [2023-09-01 03:47:14,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1756c78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:47:14, skipping insertion in model container [2023-09-01 03:47:14,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:47:13" (2/3) ... [2023-09-01 03:47:14,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1756c78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:47:14, skipping insertion in model container [2023-09-01 03:47:14,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:47:14" (3/3) ... [2023-09-01 03:47:14,724 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-09-01 03:47:14,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:47:14,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 03:47:14,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:47:14,815 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:47:14,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 03:47:14,902 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-09-01 03:47:14,902 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:47:14,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 100. Up to 3 conditions per place. [2023-09-01 03:47:14,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 03:47:14,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-09-01 03:47:14,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:47:14,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-09-01 03:47:14,930 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-09-01 03:47:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-09-01 03:47:14,959 INFO L130 PetriNetUnfolder]: 11/138 cut-off events. [2023-09-01 03:47:14,959 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:47:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 100. Up to 3 conditions per place. [2023-09-01 03:47:14,961 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2023-09-01 03:47:27,764 INFO L134 LiptonReduction]: Checked pairs total: 1347 [2023-09-01 03:47:27,765 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-09-01 03:47:27,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:47:27,780 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;@4418469a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:47:27,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-09-01 03:47:27,783 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:47:27,784 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:47:27,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:27,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:27,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:27,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 21057, now seen corresponding path program 1 times [2023-09-01 03:47:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211543381] [2023-09-01 03:47:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:27,804 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 03:47:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:27,807 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 03:47:27,809 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 03:47:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:47:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:28,096 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:28,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:28,135 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 03:47:28,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:28,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211543381] [2023-09-01 03:47:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211543381] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:28,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736004428] [2023-09-01 03:47:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:28,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:28,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:28,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:28,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:28,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:28,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:28,737 INFO L130 PetriNetUnfolder]: 909/1300 cut-off events. [2023-09-01 03:47:28,737 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 03:47:28,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2633 conditions, 1300 events. 909/1300 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 6232 event pairs, 419 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 1197. Up to 648 conditions per place. [2023-09-01 03:47:28,753 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-09-01 03:47:28,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 268 flow [2023-09-01 03:47:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-09-01 03:47:28,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47079037800687284 [2023-09-01 03:47:28,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-09-01 03:47:28,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-09-01 03:47:28,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:28,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-09-01 03:47:28,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:28,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:28,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:28,798 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 411 transitions. [2023-09-01 03:47:28,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 268 flow [2023-09-01 03:47:28,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:47:28,805 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 82 flow [2023-09-01 03:47:28,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-09-01 03:47:28,815 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-09-01 03:47:28,816 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 82 flow [2023-09-01 03:47:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:28,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:28,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:28,832 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 03:47:29,027 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 03:47:29,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:29,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 21056, now seen corresponding path program 1 times [2023-09-01 03:47:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:29,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304146908] [2023-09-01 03:47:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:29,030 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 03:47:29,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:29,031 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 03:47:29,041 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 03:47:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:47:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:29,121 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:47:29,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:47:29,134 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 03:47:29,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:29,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304146908] [2023-09-01 03:47:29,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304146908] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:29,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:29,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:29,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699901774] [2023-09-01 03:47:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:29,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:29,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:29,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:29,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:29,496 INFO L130 PetriNetUnfolder]: 921/1310 cut-off events. [2023-09-01 03:47:29,497 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:47:29,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2631 conditions, 1310 events. 921/1310 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 6160 event pairs, 422 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 1313. Up to 1296 conditions per place. [2023-09-01 03:47:29,504 INFO L137 encePairwiseOnDemand]: 289/291 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-09-01 03:47:29,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 142 flow [2023-09-01 03:47:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-09-01 03:47:29,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434135166093929 [2023-09-01 03:47:29,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-09-01 03:47:29,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-09-01 03:47:29,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:29,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-09-01 03:47:29,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,514 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 82 flow. Second operand 3 states and 379 transitions. [2023-09-01 03:47:29,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 142 flow [2023-09-01 03:47:29,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:29,516 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 80 flow [2023-09-01 03:47:29,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-09-01 03:47:29,518 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-09-01 03:47:29,519 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 80 flow [2023-09-01 03:47:29,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:29,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:29,533 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 (3)] Ended with exit code 0 [2023-09-01 03:47:29,728 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 03:47:29,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:29,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash 21112, now seen corresponding path program 1 times [2023-09-01 03:47:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:29,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076713375] [2023-09-01 03:47:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:29,731 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 03:47:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:29,732 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 03:47:29,738 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 03:47:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:47:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:29,821 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 03:47:29,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-09-01 03:47:29,850 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 03:47:29,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:29,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076713375] [2023-09-01 03:47:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076713375] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:29,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593360431] [2023-09-01 03:47:29,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:29,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:29,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:29,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:29,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:29,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:30,196 INFO L130 PetriNetUnfolder]: 701/1018 cut-off events. [2023-09-01 03:47:30,196 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:47:30,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2047 conditions, 1018 events. 701/1018 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 4732 event pairs, 318 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 2039. Up to 1004 conditions per place. [2023-09-01 03:47:30,201 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 03:47:30,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-09-01 03:47:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-09-01 03:47:30,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329896907216495 [2023-09-01 03:47:30,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-09-01 03:47:30,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-09-01 03:47:30,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:30,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-09-01 03:47:30,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,208 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 80 flow. Second operand 3 states and 378 transitions. [2023-09-01 03:47:30,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-09-01 03:47:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:30,209 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-09-01 03:47:30,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 03:47:30,210 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 03:47:30,211 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-09-01 03:47:30,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:30,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:47:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:47:30,420 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 03:47:30,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:30,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 21114, now seen corresponding path program 1 times [2023-09-01 03:47:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397820380] [2023-09-01 03:47:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:30,422 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 03:47:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:30,426 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 03:47:30,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:47:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:47:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:30,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:30,543 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:47:30,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:47:30,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 03:47:30,592 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 03:47:30,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:30,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397820380] [2023-09-01 03:47:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397820380] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:30,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:30,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996351251] [2023-09-01 03:47:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:30,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:30,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:30,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:30,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:30,864 INFO L130 PetriNetUnfolder]: 481/726 cut-off events. [2023-09-01 03:47:30,864 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:47:30,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 726 events. 481/726 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3301 event pairs, 214 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 1455. Up to 712 conditions per place. [2023-09-01 03:47:30,868 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 03:47:30,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2023-09-01 03:47:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-09-01 03:47:30,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306987399770905 [2023-09-01 03:47:30,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-09-01 03:47:30,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-09-01 03:47:30,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:30,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-09-01 03:47:30,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,874 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 376 transitions. [2023-09-01 03:47:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2023-09-01 03:47:30,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:30,875 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2023-09-01 03:47:30,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-09-01 03:47:30,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-09-01 03:47:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2023-09-01 03:47:30,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:30,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:30,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:47:30,893 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 03:47:31,093 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 03:47:31,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:31,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:31,094 INFO L85 PathProgramCache]: Analyzing trace with hash 654542, now seen corresponding path program 1 times [2023-09-01 03:47:31,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:31,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463462475] [2023-09-01 03:47:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:31,095 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 03:47:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:31,096 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 03:47:31,097 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 03:47:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:47:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:31,210 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:31,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:31,279 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 03:47:31,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:47:31,482 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 03:47:31,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:31,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463462475] [2023-09-01 03:47:31,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463462475] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:47:31,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:47:31,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:47:31,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126133446] [2023-09-01 03:47:31,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:47:31,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:47:31,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:47:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:47:31,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2023-09-01 03:47:31,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:31,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:31,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2023-09-01 03:47:31,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:32,485 INFO L130 PetriNetUnfolder]: 703/1072 cut-off events. [2023-09-01 03:47:32,485 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:47:32,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 1072 events. 703/1072 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5358 event pairs, 319 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 2149. Up to 355 conditions per place. [2023-09-01 03:47:32,490 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-09-01 03:47:32,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2023-09-01 03:47:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:47:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:47:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 747 transitions. [2023-09-01 03:47:32,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42783505154639173 [2023-09-01 03:47:32,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 747 transitions. [2023-09-01 03:47:32,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 747 transitions. [2023-09-01 03:47:32,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:32,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 747 transitions. [2023-09-01 03:47:32,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,499 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,500 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 747 transitions. [2023-09-01 03:47:32,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2023-09-01 03:47:32,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:32,502 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2023-09-01 03:47:32,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-09-01 03:47:32,502 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 03:47:32,503 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2023-09-01 03:47:32,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:32,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:47:32,515 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 03:47:32,712 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 03:47:32,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:32,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 20305033, now seen corresponding path program 1 times [2023-09-01 03:47:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095168965] [2023-09-01 03:47:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:32,714 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 03:47:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:32,715 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 03:47:32,718 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 03:47:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:47:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:47:32,823 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:47:32,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:47:32,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:47:32,856 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 03:47:32,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:32,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095168965] [2023-09-01 03:47:32,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095168965] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:32,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:32,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832549487] [2023-09-01 03:47:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:32,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:32,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:33,130 INFO L130 PetriNetUnfolder]: 666/999 cut-off events. [2023-09-01 03:47:33,130 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:47:33,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 999 events. 666/999 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 4795 event pairs, 294 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 2026. Up to 978 conditions per place. [2023-09-01 03:47:33,135 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 03:47:33,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2023-09-01 03:47:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-09-01 03:47:33,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284077892325315 [2023-09-01 03:47:33,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-09-01 03:47:33,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-09-01 03:47:33,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:33,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-09-01 03:47:33,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,142 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 374 transitions. [2023-09-01 03:47:33,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2023-09-01 03:47:33,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:33,146 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2023-09-01 03:47:33,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-09-01 03:47:33,148 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-09-01 03:47:33,149 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2023-09-01 03:47:33,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:33,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:47:33,161 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 03:47:33,359 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 03:47:33,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:33,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 20305035, now seen corresponding path program 1 times [2023-09-01 03:47:33,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487383242] [2023-09-01 03:47:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:33,365 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 03:47:33,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:33,366 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 03:47:33,369 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 03:47:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:47:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:33,461 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 03:47:33,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-09-01 03:47:33,483 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 03:47:33,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:33,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:33,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487383242] [2023-09-01 03:47:33,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487383242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:33,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:33,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:47:33,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487489742] [2023-09-01 03:47:33,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:33,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:47:33,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:47:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:47:33,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:47:33,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:33,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:47:33,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:33,733 INFO L130 PetriNetUnfolder]: 609/906 cut-off events. [2023-09-01 03:47:33,734 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 03:47:33,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 906 events. 609/906 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 4250 event pairs, 267 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 1836. Up to 885 conditions per place. [2023-09-01 03:47:33,738 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 03:47:33,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2023-09-01 03:47:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:47:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:47:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-09-01 03:47:33,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41580756013745707 [2023-09-01 03:47:33,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-09-01 03:47:33,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-09-01 03:47:33,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:33,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-09-01 03:47:33,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,744 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 363 transitions. [2023-09-01 03:47:33,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2023-09-01 03:47:33,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:33,745 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2023-09-01 03:47:33,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-09-01 03:47:33,746 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-09-01 03:47:33,746 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2023-09-01 03:47:33,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:33,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:33,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:47:33,759 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 03:47:33,956 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 03:47:33,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:33,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 629452168, now seen corresponding path program 1 times [2023-09-01 03:47:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845807675] [2023-09-01 03:47:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:33,957 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 03:47:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:33,958 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 03:47:33,959 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 03:47:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:47:34,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:34,070 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 03:47:34,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:34,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845807675] [2023-09-01 03:47:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845807675] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:34,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:34,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:47:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487240439] [2023-09-01 03:47:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:47:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:47:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:47:34,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:47:34,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:34,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:34,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:47:34,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:34,389 INFO L130 PetriNetUnfolder]: 387/594 cut-off events. [2023-09-01 03:47:34,389 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:47:34,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 594 events. 387/594 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 2607 event pairs, 176 based on Foata normal form. 5/239 useless extension candidates. Maximal degree in co-relation 1209. Up to 571 conditions per place. [2023-09-01 03:47:34,392 INFO L137 encePairwiseOnDemand]: 278/291 looper letters, 26 selfloop transitions, 2 changer transitions 5/35 dead transitions. [2023-09-01 03:47:34,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 194 flow [2023-09-01 03:47:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:47:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:47:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-09-01 03:47:34,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43127147766323026 [2023-09-01 03:47:34,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-09-01 03:47:34,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-09-01 03:47:34,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:34,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-09-01 03:47:34,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:34,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:34,399 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:34,399 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 502 transitions. [2023-09-01 03:47:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 194 flow [2023-09-01 03:47:34,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:47:34,401 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 139 flow [2023-09-01 03:47:34,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-09-01 03:47:34,401 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-09-01 03:47:34,402 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 139 flow [2023-09-01 03:47:34,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:34,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:34,402 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:47:34,412 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 03:47:34,611 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 03:47:34,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:34,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1973613183, now seen corresponding path program 2 times [2023-09-01 03:47:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:34,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845175146] [2023-09-01 03:47:34,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:47:34,612 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 03:47:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:34,615 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 03:47:34,616 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 03:47:34,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:47:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:47:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:47:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:34,758 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:34,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:34,906 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 03:47:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:47:35,475 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 03:47:35,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845175146] [2023-09-01 03:47:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845175146] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:47:35,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:47:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:47:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848262019] [2023-09-01 03:47:35,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:47:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:47:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:47:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:47:37,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2023-09-01 03:47:37,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:37,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:37,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2023-09-01 03:47:37,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:40,093 INFO L130 PetriNetUnfolder]: 1740/2625 cut-off events. [2023-09-01 03:47:40,093 INFO L131 PetriNetUnfolder]: For 307/307 co-relation queries the response was YES. [2023-09-01 03:47:40,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7362 conditions, 2625 events. 1740/2625 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14150 event pairs, 793 based on Foata normal form. 6/1002 useless extension candidates. Maximal degree in co-relation 7342. Up to 2045 conditions per place. [2023-09-01 03:47:40,113 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 173 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2023-09-01 03:47:40,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 187 transitions, 1069 flow [2023-09-01 03:47:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:47:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:47:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1535 transitions. [2023-09-01 03:47:40,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395761741122566 [2023-09-01 03:47:40,122 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1535 transitions. [2023-09-01 03:47:40,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1535 transitions. [2023-09-01 03:47:40,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:40,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1535 transitions. [2023-09-01 03:47:40,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.91666666666667) internal successors, (1535), 12 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:40,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:40,132 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:40,132 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 139 flow. Second operand 12 states and 1535 transitions. [2023-09-01 03:47:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 187 transitions, 1069 flow [2023-09-01 03:47:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 187 transitions, 1063 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:47:40,136 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 231 flow [2023-09-01 03:47:40,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=231, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-09-01 03:47:40,137 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-09-01 03:47:40,137 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 231 flow [2023-09-01 03:47:40,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:40,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:40,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:47:40,156 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 03:47:40,354 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 03:47:40,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:40,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1973232677, now seen corresponding path program 1 times [2023-09-01 03:47:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398573136] [2023-09-01 03:47:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:40,355 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 03:47:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:40,356 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 03:47:40,357 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 03:47:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:47:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:40,493 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:40,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:40,618 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 03:47:40,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:47:41,139 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 03:47:41,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398573136] [2023-09-01 03:47:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398573136] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:47:41,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:47:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:47:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719026860] [2023-09-01 03:47:41,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:47:41,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:47:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:47:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:47:42,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-09-01 03:47:42,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:42,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:42,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-09-01 03:47:42,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:45,093 INFO L130 PetriNetUnfolder]: 1479/2256 cut-off events. [2023-09-01 03:47:45,093 INFO L131 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2023-09-01 03:47:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6354 conditions, 2256 events. 1479/2256 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11946 event pairs, 670 based on Foata normal form. 0/903 useless extension candidates. Maximal degree in co-relation 6327. Up to 1739 conditions per place. [2023-09-01 03:47:45,115 INFO L137 encePairwiseOnDemand]: 284/291 looper letters, 55 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2023-09-01 03:47:45,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 467 flow [2023-09-01 03:47:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:47:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:47:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1028 transitions. [2023-09-01 03:47:45,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39251622756777393 [2023-09-01 03:47:45,120 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1028 transitions. [2023-09-01 03:47:45,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1028 transitions. [2023-09-01 03:47:45,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:45,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1028 transitions. [2023-09-01 03:47:45,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.22222222222223) internal successors, (1028), 9 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,127 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,127 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 231 flow. Second operand 9 states and 1028 transitions. [2023-09-01 03:47:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 467 flow [2023-09-01 03:47:45,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 442 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:47:45,131 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 251 flow [2023-09-01 03:47:45,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2023-09-01 03:47:45,133 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-09-01 03:47:45,133 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 251 flow [2023-09-01 03:47:45,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:45,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:47:45,145 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 03:47:45,343 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 03:47:45,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:45,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1973232678, now seen corresponding path program 1 times [2023-09-01 03:47:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822078639] [2023-09-01 03:47:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:47:45,345 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 03:47:45,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:45,345 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 03:47:45,346 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 03:47:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:47:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:47:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:45,438 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:47:45,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:47:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:47:45,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:45,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:45,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822078639] [2023-09-01 03:47:45,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822078639] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:45,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:45,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:47:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049832537] [2023-09-01 03:47:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:45,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:47:45,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:47:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:47:45,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 291 [2023-09-01 03:47:45,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:45,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 291 [2023-09-01 03:47:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:45,856 INFO L130 PetriNetUnfolder]: 824/1301 cut-off events. [2023-09-01 03:47:45,856 INFO L131 PetriNetUnfolder]: For 1210/1210 co-relation queries the response was YES. [2023-09-01 03:47:45,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 1301 events. 824/1301 cut-off events. For 1210/1210 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6430 event pairs, 345 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 4316. Up to 1249 conditions per place. [2023-09-01 03:47:45,876 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 27 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-09-01 03:47:45,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 35 transitions, 305 flow [2023-09-01 03:47:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:47:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:47:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-09-01 03:47:45,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106529209621993 [2023-09-01 03:47:45,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-09-01 03:47:45,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-09-01 03:47:45,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:45,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-09-01 03:47:45,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,883 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 251 flow. Second operand 4 states and 478 transitions. [2023-09-01 03:47:45,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 35 transitions, 305 flow [2023-09-01 03:47:45,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 35 transitions, 257 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 03:47:45,887 INFO L231 Difference]: Finished difference. Result has 56 places, 35 transitions, 203 flow [2023-09-01 03:47:45,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=56, PETRI_TRANSITIONS=35} [2023-09-01 03:47:45,887 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-09-01 03:47:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 35 transitions, 203 flow [2023-09-01 03:47:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 03:47:45,897 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 03:47:46,097 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 03:47:46,097 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:46,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2100876728, now seen corresponding path program 2 times [2023-09-01 03:47:46,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:46,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657150488] [2023-09-01 03:47:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:47:46,098 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 03:47:46,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:46,099 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 03:47:46,099 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 03:47:46,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:47:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:47:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:47:46,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:46,237 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:46,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:46,317 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 03:47:46,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:47:46,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:46,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657150488] [2023-09-01 03:47:46,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657150488] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:47:46,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:47:46,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:47:46,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375390176] [2023-09-01 03:47:46,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:47:46,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:47:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:47:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:47:46,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:47:46,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 35 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:46,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:46,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:47:46,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:46,697 INFO L130 PetriNetUnfolder]: 387/663 cut-off events. [2023-09-01 03:47:46,697 INFO L131 PetriNetUnfolder]: For 894/894 co-relation queries the response was YES. [2023-09-01 03:47:46,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 663 events. 387/663 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2935 event pairs, 152 based on Foata normal form. 162/593 useless extension candidates. Maximal degree in co-relation 1838. Up to 626 conditions per place. [2023-09-01 03:47:46,701 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 24 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-09-01 03:47:46,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 32 transitions, 239 flow [2023-09-01 03:47:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:47:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:47:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-09-01 03:47:46,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40463917525773196 [2023-09-01 03:47:46,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-09-01 03:47:46,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-09-01 03:47:46,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:46,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-09-01 03:47:46,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:46,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:46,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:46,708 INFO L175 Difference]: Start difference. First operand has 56 places, 35 transitions, 203 flow. Second operand 4 states and 471 transitions. [2023-09-01 03:47:46,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 32 transitions, 239 flow [2023-09-01 03:47:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 229 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:47:46,710 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 181 flow [2023-09-01 03:47:46,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-09-01 03:47:46,711 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-09-01 03:47:46,712 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 181 flow [2023-09-01 03:47:46,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:46,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:47:46,713 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:47:46,724 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 03:47:46,921 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 03:47:46,922 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:47:46,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:47:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 595843681, now seen corresponding path program 3 times [2023-09-01 03:47:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:47:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697055860] [2023-09-01 03:47:46,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:47:46,923 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 03:47:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:47:46,924 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 03:47:46,927 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 03:47:47,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:47:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:47:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:47:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:47:47,173 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:47:47,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:47:47,487 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 03:47:47,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:47:49,520 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 03:47:49,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:47:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697055860] [2023-09-01 03:47:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697055860] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:47:49,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:47:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:47:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639526363] [2023-09-01 03:47:49,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:47:49,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:47:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:47:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:47:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:47:57,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2023-09-01 03:47:57,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 181 flow. Second operand has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:57,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:47:57,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2023-09-01 03:47:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:11,393 INFO L130 PetriNetUnfolder]: 930/1647 cut-off events. [2023-09-01 03:48:11,394 INFO L131 PetriNetUnfolder]: For 765/765 co-relation queries the response was YES. [2023-09-01 03:48:11,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4565 conditions, 1647 events. 930/1647 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8346 event pairs, 379 based on Foata normal form. 12/1110 useless extension candidates. Maximal degree in co-relation 4541. Up to 1097 conditions per place. [2023-09-01 03:48:11,400 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 275 selfloop transitions, 24 changer transitions 0/301 dead transitions. [2023-09-01 03:48:11,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 301 transitions, 1765 flow [2023-09-01 03:48:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:48:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:48:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2999 transitions. [2023-09-01 03:48:11,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42941008018327603 [2023-09-01 03:48:11,408 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2999 transitions. [2023-09-01 03:48:11,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2999 transitions. [2023-09-01 03:48:11,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:11,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2999 transitions. [2023-09-01 03:48:11,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 124.95833333333333) internal successors, (2999), 24 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:11,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 291.0) internal successors, (7275), 25 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:11,425 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 291.0) internal successors, (7275), 25 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:11,425 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 181 flow. Second operand 24 states and 2999 transitions. [2023-09-01 03:48:11,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 301 transitions, 1765 flow [2023-09-01 03:48:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 301 transitions, 1741 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:48:11,431 INFO L231 Difference]: Finished difference. Result has 86 places, 45 transitions, 361 flow [2023-09-01 03:48:11,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=45} [2023-09-01 03:48:11,432 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2023-09-01 03:48:11,432 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 45 transitions, 361 flow [2023-09-01 03:48:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:11,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:11,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:11,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 03:48:11,644 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 03:48:11,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:11,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1321794333, now seen corresponding path program 1 times [2023-09-01 03:48:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401291830] [2023-09-01 03:48:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:11,645 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 03:48:11,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:11,646 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 03:48:11,648 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 03:48:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:48:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:11,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:11,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401291830] [2023-09-01 03:48:11,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401291830] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:11,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:48:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679405793] [2023-09-01 03:48:11,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:48:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:48:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:48:11,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 291 [2023-09-01 03:48:11,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 45 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:11,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:11,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 291 [2023-09-01 03:48:11,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:12,521 INFO L130 PetriNetUnfolder]: 1493/2819 cut-off events. [2023-09-01 03:48:12,521 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2023-09-01 03:48:12,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7566 conditions, 2819 events. 1493/2819 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16928 event pairs, 189 based on Foata normal form. 21/2042 useless extension candidates. Maximal degree in co-relation 7529. Up to 1597 conditions per place. [2023-09-01 03:48:12,534 INFO L137 encePairwiseOnDemand]: 284/291 looper letters, 54 selfloop transitions, 13 changer transitions 2/70 dead transitions. [2023-09-01 03:48:12,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 575 flow [2023-09-01 03:48:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:48:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:48:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 733 transitions. [2023-09-01 03:48:12,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198167239404353 [2023-09-01 03:48:12,555 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 733 transitions. [2023-09-01 03:48:12,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 733 transitions. [2023-09-01 03:48:12,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:12,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 733 transitions. [2023-09-01 03:48:12,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.16666666666667) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:12,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:12,559 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:12,560 INFO L175 Difference]: Start difference. First operand has 86 places, 45 transitions, 361 flow. Second operand 6 states and 733 transitions. [2023-09-01 03:48:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 575 flow [2023-09-01 03:48:12,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 527 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 03:48:12,564 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 386 flow [2023-09-01 03:48:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2023-09-01 03:48:12,565 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 46 predicate places. [2023-09-01 03:48:12,565 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 386 flow [2023-09-01 03:48:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:12,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:12,784 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 03:48:12,785 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:12,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -203926958, now seen corresponding path program 1 times [2023-09-01 03:48:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677629278] [2023-09-01 03:48:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:12,786 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 03:48:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:12,787 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 03:48:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:48:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:12,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:48:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:12,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:12,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677629278] [2023-09-01 03:48:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677629278] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:12,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:12,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:48:12,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543769413] [2023-09-01 03:48:12,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:48:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:12,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:48:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:48:13,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:48:13,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:13,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:13,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:48:13,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:13,652 INFO L130 PetriNetUnfolder]: 1063/2207 cut-off events. [2023-09-01 03:48:13,652 INFO L131 PetriNetUnfolder]: For 2419/2459 co-relation queries the response was YES. [2023-09-01 03:48:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7313 conditions, 2207 events. 1063/2207 cut-off events. For 2419/2459 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13492 event pairs, 200 based on Foata normal form. 240/2207 useless extension candidates. Maximal degree in co-relation 7272. Up to 1861 conditions per place. [2023-09-01 03:48:13,664 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 47 selfloop transitions, 4 changer transitions 5/58 dead transitions. [2023-09-01 03:48:13,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 58 transitions, 510 flow [2023-09-01 03:48:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-09-01 03:48:13,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41408934707903783 [2023-09-01 03:48:13,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-09-01 03:48:13,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-09-01 03:48:13,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:13,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-09-01 03:48:13,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:13,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:13,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:13,675 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 386 flow. Second operand 4 states and 482 transitions. [2023-09-01 03:48:13,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 58 transitions, 510 flow [2023-09-01 03:48:13,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 58 transitions, 488 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:48:13,685 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 378 flow [2023-09-01 03:48:13,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=378, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2023-09-01 03:48:13,686 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-09-01 03:48:13,686 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 378 flow [2023-09-01 03:48:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:13,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:13,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:13,701 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 03:48:13,901 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 03:48:13,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:13,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash -891164034, now seen corresponding path program 1 times [2023-09-01 03:48:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323634317] [2023-09-01 03:48:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:13,902 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 03:48:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:13,903 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 03:48:13,906 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 03:48:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:13,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:48:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:14,045 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 03:48:14,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:14,132 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:48:14,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-09-01 03:48:14,176 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 03:48:14,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323634317] [2023-09-01 03:48:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323634317] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:14,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 03:48:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143038162] [2023-09-01 03:48:14,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:14,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:48:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:48:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:48:14,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:48:14,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 378 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:14,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:14,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:48:14,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:14,969 INFO L130 PetriNetUnfolder]: 1183/2527 cut-off events. [2023-09-01 03:48:14,969 INFO L131 PetriNetUnfolder]: For 5289/5349 co-relation queries the response was YES. [2023-09-01 03:48:14,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 2527 events. 1183/2527 cut-off events. For 5289/5349 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16254 event pairs, 260 based on Foata normal form. 180/2447 useless extension candidates. Maximal degree in co-relation 9312. Up to 1941 conditions per place. [2023-09-01 03:48:14,982 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-09-01 03:48:14,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 60 transitions, 533 flow [2023-09-01 03:48:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-09-01 03:48:14,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41408934707903783 [2023-09-01 03:48:14,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-09-01 03:48:14,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-09-01 03:48:14,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:14,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-09-01 03:48:14,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:14,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:14,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:14,990 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 378 flow. Second operand 4 states and 482 transitions. [2023-09-01 03:48:14,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 60 transitions, 533 flow [2023-09-01 03:48:14,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 60 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:48:14,999 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 403 flow [2023-09-01 03:48:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=403, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2023-09-01 03:48:15,001 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-09-01 03:48:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 403 flow [2023-09-01 03:48:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:15,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:15,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:15,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:15,212 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 03:48:15,212 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:15,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2114291928, now seen corresponding path program 2 times [2023-09-01 03:48:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:15,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562358211] [2023-09-01 03:48:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:48:15,213 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 03:48:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:15,214 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 03:48:15,214 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 03:48:15,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:48:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:48:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:15,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:48:15,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:48:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:15,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:15,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562358211] [2023-09-01 03:48:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562358211] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:48:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452332040] [2023-09-01 03:48:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:48:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:48:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:48:15,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-09-01 03:48:15,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:15,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:15,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-09-01 03:48:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:16,229 INFO L130 PetriNetUnfolder]: 1103/2447 cut-off events. [2023-09-01 03:48:16,229 INFO L131 PetriNetUnfolder]: For 6589/6709 co-relation queries the response was YES. [2023-09-01 03:48:16,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9716 conditions, 2447 events. 1103/2447 cut-off events. For 6589/6709 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 16195 event pairs, 340 based on Foata normal form. 120/2267 useless extension candidates. Maximal degree in co-relation 9672. Up to 1961 conditions per place. [2023-09-01 03:48:16,240 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 47 selfloop transitions, 2 changer transitions 7/58 dead transitions. [2023-09-01 03:48:16,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 58 transitions, 531 flow [2023-09-01 03:48:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-09-01 03:48:16,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951890034364261 [2023-09-01 03:48:16,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-09-01 03:48:16,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-09-01 03:48:16,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:16,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-09-01 03:48:16,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:16,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:16,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:16,247 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 403 flow. Second operand 4 states and 460 transitions. [2023-09-01 03:48:16,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 58 transitions, 531 flow [2023-09-01 03:48:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 58 transitions, 520 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 03:48:16,256 INFO L231 Difference]: Finished difference. Result has 91 places, 49 transitions, 376 flow [2023-09-01 03:48:16,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=91, PETRI_TRANSITIONS=49} [2023-09-01 03:48:16,257 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-09-01 03:48:16,257 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 49 transitions, 376 flow [2023-09-01 03:48:16,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:16,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:16,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:16,268 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 03:48:16,468 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 03:48:16,468 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:16,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash -874105724, now seen corresponding path program 2 times [2023-09-01 03:48:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167653589] [2023-09-01 03:48:16,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:48:16,469 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 03:48:16,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:16,470 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 03:48:16,471 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 03:48:16,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:48:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:48:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:17,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167653589] [2023-09-01 03:48:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167653589] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 03:48:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480847245] [2023-09-01 03:48:17,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:48:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:48:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:48:17,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 291 [2023-09-01 03:48:17,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 49 transitions, 376 flow. Second operand has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:17,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:17,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 291 [2023-09-01 03:48:17,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:17,933 INFO L130 PetriNetUnfolder]: 983/1975 cut-off events. [2023-09-01 03:48:17,933 INFO L131 PetriNetUnfolder]: For 6197/6258 co-relation queries the response was YES. [2023-09-01 03:48:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7929 conditions, 1975 events. 983/1975 cut-off events. For 6197/6258 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 11276 event pairs, 475 based on Foata normal form. 85/1798 useless extension candidates. Maximal degree in co-relation 7884. Up to 1830 conditions per place. [2023-09-01 03:48:17,945 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 42 selfloop transitions, 4 changer transitions 22/70 dead transitions. [2023-09-01 03:48:17,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 70 transitions, 613 flow [2023-09-01 03:48:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:48:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:48:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1035 transitions. [2023-09-01 03:48:17,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951890034364261 [2023-09-01 03:48:17,949 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1035 transitions. [2023-09-01 03:48:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1035 transitions. [2023-09-01 03:48:17,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:17,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1035 transitions. [2023-09-01 03:48:17,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:17,955 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:17,955 INFO L175 Difference]: Start difference. First operand has 91 places, 49 transitions, 376 flow. Second operand 9 states and 1035 transitions. [2023-09-01 03:48:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 70 transitions, 613 flow [2023-09-01 03:48:17,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 70 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-09-01 03:48:17,973 INFO L231 Difference]: Finished difference. Result has 95 places, 48 transitions, 391 flow [2023-09-01 03:48:17,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=95, PETRI_TRANSITIONS=48} [2023-09-01 03:48:17,974 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2023-09-01 03:48:17,974 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 48 transitions, 391 flow [2023-09-01 03:48:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.91666666666667) internal successors, (1343), 12 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:17,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:17,989 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 03:48:18,185 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 03:48:18,185 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:18,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -546131255, now seen corresponding path program 3 times [2023-09-01 03:48:18,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:18,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55170384] [2023-09-01 03:48:18,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:48:18,186 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 03:48:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:18,188 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 03:48:18,190 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 03:48:18,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:48:18,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:48:18,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:18,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:48:18,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:48:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:18,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:48:18,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55170384] [2023-09-01 03:48:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55170384] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:48:18,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:48:18,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:48:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012627908] [2023-09-01 03:48:18,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:48:18,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:48:18,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:48:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:48:18,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-09-01 03:48:18,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 48 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:18,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:18,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-09-01 03:48:18,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:19,202 INFO L130 PetriNetUnfolder]: 801/1604 cut-off events. [2023-09-01 03:48:19,202 INFO L131 PetriNetUnfolder]: For 7868/7944 co-relation queries the response was YES. [2023-09-01 03:48:19,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 1604 events. 801/1604 cut-off events. For 7868/7944 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8451 event pairs, 57 based on Foata normal form. 152/1528 useless extension candidates. Maximal degree in co-relation 7775. Up to 875 conditions per place. [2023-09-01 03:48:19,212 INFO L137 encePairwiseOnDemand]: 287/291 looper letters, 49 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-09-01 03:48:19,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 55 transitions, 529 flow [2023-09-01 03:48:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:48:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:48:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-09-01 03:48:19,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943298969072165 [2023-09-01 03:48:19,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-09-01 03:48:19,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-09-01 03:48:19,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:19,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-09-01 03:48:19,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:19,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:19,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:19,218 INFO L175 Difference]: Start difference. First operand has 95 places, 48 transitions, 391 flow. Second operand 4 states and 459 transitions. [2023-09-01 03:48:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 55 transitions, 529 flow [2023-09-01 03:48:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 55 transitions, 488 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-09-01 03:48:19,236 INFO L231 Difference]: Finished difference. Result has 87 places, 48 transitions, 371 flow [2023-09-01 03:48:19,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=371, PETRI_PLACES=87, PETRI_TRANSITIONS=48} [2023-09-01 03:48:19,237 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-09-01 03:48:19,237 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 48 transitions, 371 flow [2023-09-01 03:48:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.33333333333333) internal successors, (662), 6 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:19,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:19,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:19,251 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 03:48:19,448 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 03:48:19,448 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:19,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash -399791552, now seen corresponding path program 1 times [2023-09-01 03:48:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778394384] [2023-09-01 03:48:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:19,449 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 03:48:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:19,450 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 03:48:19,452 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 03:48:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:48:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:20,120 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:48:20,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-09-01 03:48:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:21,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:21,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778394384] [2023-09-01 03:48:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778394384] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:21,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:48:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334865210] [2023-09-01 03:48:21,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:48:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:48:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:48:21,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-09-01 03:48:21,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 48 transitions, 371 flow. Second operand has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:21,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:21,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-09-01 03:48:21,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:22,810 INFO L130 PetriNetUnfolder]: 1618/3162 cut-off events. [2023-09-01 03:48:22,810 INFO L131 PetriNetUnfolder]: For 6120/6120 co-relation queries the response was YES. [2023-09-01 03:48:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12737 conditions, 3162 events. 1618/3162 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 19131 event pairs, 19 based on Foata normal form. 19/2763 useless extension candidates. Maximal degree in co-relation 12694. Up to 1787 conditions per place. [2023-09-01 03:48:22,824 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 62 selfloop transitions, 24 changer transitions 2/89 dead transitions. [2023-09-01 03:48:22,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 748 flow [2023-09-01 03:48:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:48:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:48:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-09-01 03:48:22,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38075601374570445 [2023-09-01 03:48:22,827 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-09-01 03:48:22,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-09-01 03:48:22,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:22,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-09-01 03:48:22,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:22,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:22,831 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:22,831 INFO L175 Difference]: Start difference. First operand has 87 places, 48 transitions, 371 flow. Second operand 10 states and 1108 transitions. [2023-09-01 03:48:22,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 748 flow [2023-09-01 03:48:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 89 transitions, 716 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 03:48:22,841 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 545 flow [2023-09-01 03:48:22,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-09-01 03:48:22,841 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2023-09-01 03:48:22,842 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 545 flow [2023-09-01 03:48:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:22,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:22,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:22,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:23,044 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 03:48:23,045 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:23,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -933247944, now seen corresponding path program 2 times [2023-09-01 03:48:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:23,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828075953] [2023-09-01 03:48:23,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:48:23,046 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 03:48:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:23,048 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 03:48:23,050 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 03:48:23,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:48:23,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:48:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:23,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:23,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828075953] [2023-09-01 03:48:23,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828075953] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:23,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:23,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-09-01 03:48:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124263668] [2023-09-01 03:48:23,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:48:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:48:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:48:23,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 291 [2023-09-01 03:48:23,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 545 flow. Second operand has 9 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:23,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:23,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 291 [2023-09-01 03:48:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:24,420 INFO L130 PetriNetUnfolder]: 2074/4169 cut-off events. [2023-09-01 03:48:24,421 INFO L131 PetriNetUnfolder]: For 12358/12358 co-relation queries the response was YES. [2023-09-01 03:48:24,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19296 conditions, 4169 events. 2074/4169 cut-off events. For 12358/12358 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 27731 event pairs, 190 based on Foata normal form. 228/4397 useless extension candidates. Maximal degree in co-relation 19249. Up to 2946 conditions per place. [2023-09-01 03:48:24,447 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 69 selfloop transitions, 13 changer transitions 1/85 dead transitions. [2023-09-01 03:48:24,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 834 flow [2023-09-01 03:48:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:48:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:48:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-09-01 03:48:24,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261168384879725 [2023-09-01 03:48:24,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-09-01 03:48:24,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-09-01 03:48:24,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:24,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-09-01 03:48:24,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:24,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:24,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:24,451 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 545 flow. Second operand 5 states and 620 transitions. [2023-09-01 03:48:24,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 834 flow [2023-09-01 03:48:24,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 760 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-09-01 03:48:24,482 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 614 flow [2023-09-01 03:48:24,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2023-09-01 03:48:24,483 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2023-09-01 03:48:24,483 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 614 flow [2023-09-01 03:48:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:24,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:24,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:24,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:24,694 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 03:48:24,694 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:24,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -431433522, now seen corresponding path program 3 times [2023-09-01 03:48:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147581778] [2023-09-01 03:48:24,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:48:24,695 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 03:48:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:24,695 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 03:48:24,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:48:24,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:48:24,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:48:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:25,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:25,257 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:48:25,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-09-01 03:48:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:26,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147581778] [2023-09-01 03:48:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147581778] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:26,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 03:48:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229682697] [2023-09-01 03:48:26,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:48:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:48:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:48:26,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-09-01 03:48:26,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:26,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:26,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-09-01 03:48:26,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:28,026 INFO L130 PetriNetUnfolder]: 2435/4853 cut-off events. [2023-09-01 03:48:28,026 INFO L131 PetriNetUnfolder]: For 15962/15962 co-relation queries the response was YES. [2023-09-01 03:48:28,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 4853 events. 2435/4853 cut-off events. For 15962/15962 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 32826 event pairs, 190 based on Foata normal form. 19/4872 useless extension candidates. Maximal degree in co-relation 22705. Up to 2338 conditions per place. [2023-09-01 03:48:28,051 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 70 selfloop transitions, 32 changer transitions 10/113 dead transitions. [2023-09-01 03:48:28,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 1049 flow [2023-09-01 03:48:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:48:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:48:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1329 transitions. [2023-09-01 03:48:28,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805841924398625 [2023-09-01 03:48:28,054 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1329 transitions. [2023-09-01 03:48:28,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1329 transitions. [2023-09-01 03:48:28,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:28,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1329 transitions. [2023-09-01 03:48:28,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:28,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:28,058 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:28,058 INFO L175 Difference]: Start difference. First operand has 99 places, 71 transitions, 614 flow. Second operand 12 states and 1329 transitions. [2023-09-01 03:48:28,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 1049 flow [2023-09-01 03:48:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 1013 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:28,123 INFO L231 Difference]: Finished difference. Result has 114 places, 78 transitions, 762 flow [2023-09-01 03:48:28,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=762, PETRI_PLACES=114, PETRI_TRANSITIONS=78} [2023-09-01 03:48:28,124 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 76 predicate places. [2023-09-01 03:48:28,124 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 78 transitions, 762 flow [2023-09-01 03:48:28,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:28,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:28,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:28,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:28,328 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 03:48:28,329 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:28,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2022753302, now seen corresponding path program 4 times [2023-09-01 03:48:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:28,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543289222] [2023-09-01 03:48:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:48:28,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:48:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:28,331 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 03:48:28,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:48:28,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:48:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 03:48:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:28,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:48:28,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:48:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:28,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:29,232 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:48:29,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-09-01 03:48:29,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:48:29,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-09-01 03:48:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:48:30,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543289222] [2023-09-01 03:48:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543289222] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:30,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:30,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:48:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96195792] [2023-09-01 03:48:30,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:30,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:48:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:48:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=196, Unknown=2, NotChecked=0, Total=240 [2023-09-01 03:48:31,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 291 [2023-09-01 03:48:31,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 78 transitions, 762 flow. Second operand has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:31,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:31,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 291 [2023-09-01 03:48:31,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:48:33,363 INFO L130 PetriNetUnfolder]: 2739/5271 cut-off events. [2023-09-01 03:48:33,364 INFO L131 PetriNetUnfolder]: For 19825/19825 co-relation queries the response was YES. [2023-09-01 03:48:33,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28234 conditions, 5271 events. 2739/5271 cut-off events. For 19825/19825 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 35231 event pairs, 0 based on Foata normal form. 19/5290 useless extension candidates. Maximal degree in co-relation 28179. Up to 2452 conditions per place. [2023-09-01 03:48:33,449 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 72 selfloop transitions, 38 changer transitions 2/113 dead transitions. [2023-09-01 03:48:33,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 1191 flow [2023-09-01 03:48:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:48:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:48:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 908 transitions. [2023-09-01 03:48:33,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120274914089347 [2023-09-01 03:48:33,452 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 908 transitions. [2023-09-01 03:48:33,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 908 transitions. [2023-09-01 03:48:33,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:33,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 908 transitions. [2023-09-01 03:48:33,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.8) internal successors, (908), 10 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:33,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:33,455 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:33,456 INFO L175 Difference]: Start difference. First operand has 114 places, 78 transitions, 762 flow. Second operand 10 states and 908 transitions. [2023-09-01 03:48:33,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 1191 flow [2023-09-01 03:48:33,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 113 transitions, 1147 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-09-01 03:48:33,712 INFO L231 Difference]: Finished difference. Result has 118 places, 87 transitions, 955 flow [2023-09-01 03:48:33,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=955, PETRI_PLACES=118, PETRI_TRANSITIONS=87} [2023-09-01 03:48:33,713 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-09-01 03:48:33,713 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 87 transitions, 955 flow [2023-09-01 03:48:33,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:33,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:33,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:33,722 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 03:48:33,914 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 03:48:33,914 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:48:33,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1139877070, now seen corresponding path program 5 times [2023-09-01 03:48:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:33,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610891963] [2023-09-01 03:48:33,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:48:33,915 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 03:48:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:33,916 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 03:48:33,917 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 03:48:34,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:48:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 03:48:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:34,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:48:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-09-01 03:48:34,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:48:34,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:48:34,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 75 [2023-09-01 03:48:55,894 WARN L222 SmtUtils]: Spent 20.60s on a formula simplification. DAG size of input: 112 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:48:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:49:00,699 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:49:00,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-09-01 03:49:00,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:49:00,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 15 [2023-09-01 03:49:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:49:05,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:05,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610891963] [2023-09-01 03:49:05,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610891963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:49:05,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:49:05,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-09-01 03:49:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495598354] [2023-09-01 03:49:05,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:49:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:49:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:49:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2023-09-01 03:49:08,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:11,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:13,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:15,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:18,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:20,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:22,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:24,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:26,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:28,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:30,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:32,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:34,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:37,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:38,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:41,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:42,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 291 [2023-09-01 03:49:42,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 87 transitions, 955 flow. Second operand has 20 states, 20 states have (on average 76.7) internal successors, (1534), 20 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:42,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:42,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 291 [2023-09-01 03:49:42,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:56,860 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:49:59,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:50:10,628 WARN L222 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 105 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:50:21,252 WARN L222 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 96 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:50:37,179 WARN L222 SmtUtils]: Spent 15.13s on a formula simplification. DAG size of input: 102 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:50:56,481 WARN L222 SmtUtils]: Spent 18.40s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:51:00,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:51:04,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:51:14,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:51:22,296 INFO L130 PetriNetUnfolder]: 2949/5853 cut-off events. [2023-09-01 03:51:22,296 INFO L131 PetriNetUnfolder]: For 31293/31293 co-relation queries the response was YES. [2023-09-01 03:51:22,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35344 conditions, 5853 events. 2949/5853 cut-off events. For 31293/31293 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 40235 event pairs, 337 based on Foata normal form. 8/5861 useless extension candidates. Maximal degree in co-relation 35286. Up to 2522 conditions per place. [2023-09-01 03:51:22,336 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 158 selfloop transitions, 84 changer transitions 17/260 dead transitions. [2023-09-01 03:51:22,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 260 transitions, 2943 flow [2023-09-01 03:51:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 03:51:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 03:51:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2344 transitions. [2023-09-01 03:51:22,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27775802820239365 [2023-09-01 03:51:22,341 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2344 transitions. [2023-09-01 03:51:22,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2344 transitions. [2023-09-01 03:51:22,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:22,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2344 transitions. [2023-09-01 03:51:22,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 80.82758620689656) internal successors, (2344), 29 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:22,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 291.0) internal successors, (8730), 30 states have internal predecessors, (8730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:22,350 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 291.0) internal successors, (8730), 30 states have internal predecessors, (8730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:22,350 INFO L175 Difference]: Start difference. First operand has 118 places, 87 transitions, 955 flow. Second operand 29 states and 2344 transitions. [2023-09-01 03:51:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 260 transitions, 2943 flow [2023-09-01 03:51:22,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 260 transitions, 2862 flow, removed 32 selfloop flow, removed 3 redundant places. [2023-09-01 03:51:22,764 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 1892 flow [2023-09-01 03:51:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1892, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2023-09-01 03:51:22,765 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-09-01 03:51:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 1892 flow [2023-09-01 03:51:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 76.7) internal successors, (1534), 20 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:22,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:22,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:51:22,972 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 03:51:22,973 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:51:22,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 491331559, now seen corresponding path program 6 times [2023-09-01 03:51:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:22,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255717969] [2023-09-01 03:51:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:51:22,974 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 03:51:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:22,975 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 03:51:22,977 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 03:51:23,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 03:51:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:51:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:51:23,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:23,348 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:51:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2023-09-01 03:51:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:51:23,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:23,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255717969] [2023-09-01 03:51:23,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255717969] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:51:23,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:51:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-09-01 03:51:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473181124] [2023-09-01 03:51:23,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:51:23,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:51:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:51:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:51:23,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:51:23,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 142 transitions, 1892 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:23,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:23,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:51:23,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:26,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:28,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:29,430 INFO L130 PetriNetUnfolder]: 2946/6138 cut-off events. [2023-09-01 03:51:29,430 INFO L131 PetriNetUnfolder]: For 51023/51064 co-relation queries the response was YES. [2023-09-01 03:51:29,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40065 conditions, 6138 events. 2946/6138 cut-off events. For 51023/51064 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 45465 event pairs, 320 based on Foata normal form. 243/6362 useless extension candidates. Maximal degree in co-relation 39993. Up to 3851 conditions per place. [2023-09-01 03:51:29,482 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 112 selfloop transitions, 41 changer transitions 7/163 dead transitions. [2023-09-01 03:51:29,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 163 transitions, 2315 flow [2023-09-01 03:51:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:51:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:51:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2023-09-01 03:51:29,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41695303550973656 [2023-09-01 03:51:29,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 728 transitions. [2023-09-01 03:51:29,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 728 transitions. [2023-09-01 03:51:29,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:29,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 728 transitions. [2023-09-01 03:51:29,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:29,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:29,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:29,487 INFO L175 Difference]: Start difference. First operand has 156 places, 142 transitions, 1892 flow. Second operand 6 states and 728 transitions. [2023-09-01 03:51:29,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 163 transitions, 2315 flow [2023-09-01 03:51:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 163 transitions, 2154 flow, removed 38 selfloop flow, removed 6 redundant places. [2023-09-01 03:51:29,937 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 1775 flow [2023-09-01 03:51:29,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1775, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2023-09-01 03:51:29,938 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-09-01 03:51:29,938 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 1775 flow [2023-09-01 03:51:29,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:29,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:29,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:29,947 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 03:51:30,143 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 03:51:30,143 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:51:30,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2087226561, now seen corresponding path program 7 times [2023-09-01 03:51:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:30,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033288641] [2023-09-01 03:51:30,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:51:30,144 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 03:51:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:30,145 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 03:51:30,147 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 03:51:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:51:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:51:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:51:30,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:30,527 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2023-09-01 03:51:30,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 30 [2023-09-01 03:51:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:51:30,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033288641] [2023-09-01 03:51:30,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033288641] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:51:30,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:51:30,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 03:51:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562187275] [2023-09-01 03:51:30,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:51:30,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:51:30,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:51:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:51:31,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:51:31,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 1775 flow. Second operand has 10 states, 10 states have (on average 115.9) internal successors, (1159), 10 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:31,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:31,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:51:31,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:33,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:35,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:37,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:39,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:51:41,002 INFO L130 PetriNetUnfolder]: 3446/7068 cut-off events. [2023-09-01 03:51:41,002 INFO L131 PetriNetUnfolder]: For 68948/68989 co-relation queries the response was YES. [2023-09-01 03:51:41,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46791 conditions, 7068 events. 3446/7068 cut-off events. For 68948/68989 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 52902 event pairs, 543 based on Foata normal form. 213/7262 useless extension candidates. Maximal degree in co-relation 46718. Up to 3553 conditions per place. [2023-09-01 03:51:41,064 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 120 selfloop transitions, 64 changer transitions 0/187 dead transitions. [2023-09-01 03:51:41,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2661 flow [2023-09-01 03:51:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:51:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:51:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 732 transitions. [2023-09-01 03:51:41,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41924398625429554 [2023-09-01 03:51:41,068 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 732 transitions. [2023-09-01 03:51:41,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 732 transitions. [2023-09-01 03:51:41,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:41,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 732 transitions. [2023-09-01 03:51:41,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:41,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:41,071 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:41,071 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 1775 flow. Second operand 6 states and 732 transitions. [2023-09-01 03:51:41,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2661 flow [2023-09-01 03:51:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 187 transitions, 2561 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-09-01 03:51:41,688 INFO L231 Difference]: Finished difference. Result has 158 places, 152 transitions, 2143 flow [2023-09-01 03:51:41,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2143, PETRI_PLACES=158, PETRI_TRANSITIONS=152} [2023-09-01 03:51:41,689 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2023-09-01 03:51:41,689 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 152 transitions, 2143 flow [2023-09-01 03:51:41,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 115.9) internal successors, (1159), 10 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:41,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:41,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:41,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:51:41,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:51:41,890 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:51:41,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1999030185, now seen corresponding path program 8 times [2023-09-01 03:51:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:41,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636624104] [2023-09-01 03:51:41,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:51:41,891 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 03:51:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:41,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:51:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 03:51:42,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:51:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 03:51:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:42,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:51:42,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:51:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:51:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:43,057 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:51:43,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-09-01 03:51:43,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:51:43,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-09-01 03:51:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:51:48,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:48,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636624104] [2023-09-01 03:51:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636624104] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:51:48,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:51:48,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-09-01 03:51:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412858453] [2023-09-01 03:51:48,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:51:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:51:48,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:51:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2023-09-01 03:51:49,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 291 [2023-09-01 03:51:49,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 152 transitions, 2143 flow. Second operand has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:49,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:49,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 291 [2023-09-01 03:51:49,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:52,221 INFO L130 PetriNetUnfolder]: 3734/7622 cut-off events. [2023-09-01 03:51:52,221 INFO L131 PetriNetUnfolder]: For 61743/61743 co-relation queries the response was YES. [2023-09-01 03:51:52,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51790 conditions, 7622 events. 3734/7622 cut-off events. For 61743/61743 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 57219 event pairs, 38 based on Foata normal form. 19/7641 useless extension candidates. Maximal degree in co-relation 51716. Up to 3937 conditions per place. [2023-09-01 03:51:52,284 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 92 selfloop transitions, 89 changer transitions 10/192 dead transitions. [2023-09-01 03:51:52,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 192 transitions, 2769 flow [2023-09-01 03:51:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:51:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:51:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1089 transitions. [2023-09-01 03:51:52,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118556701030928 [2023-09-01 03:51:52,286 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1089 transitions. [2023-09-01 03:51:52,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1089 transitions. [2023-09-01 03:51:52,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:52,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1089 transitions. [2023-09-01 03:51:52,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 90.75) internal successors, (1089), 12 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:52,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:52,290 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:52,290 INFO L175 Difference]: Start difference. First operand has 158 places, 152 transitions, 2143 flow. Second operand 12 states and 1089 transitions. [2023-09-01 03:51:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 192 transitions, 2769 flow [2023-09-01 03:51:53,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 192 transitions, 2601 flow, removed 44 selfloop flow, removed 4 redundant places. [2023-09-01 03:51:53,053 INFO L231 Difference]: Finished difference. Result has 169 places, 157 transitions, 2303 flow [2023-09-01 03:51:53,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2303, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2023-09-01 03:51:53,054 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-09-01 03:51:53,054 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 2303 flow [2023-09-01 03:51:53,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.0) internal successors, (1392), 16 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:53,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:53,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:53,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:51:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:51:53,256 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:51:53,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 57181277, now seen corresponding path program 9 times [2023-09-01 03:51:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579102914] [2023-09-01 03:51:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:51:53,257 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 03:51:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:53,258 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:51:53,259 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 (29)] Waiting until timeout for monitored process [2023-09-01 03:51:53,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:51:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:53,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:51:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:53,471 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:51:53,471 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:51:53,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 03:51:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:51:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:51:54,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:51:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579102914] [2023-09-01 03:51:54,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579102914] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:51:54,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:51:54,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 03:51:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549781286] [2023-09-01 03:51:54,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:51:54,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:51:54,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:51:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:51:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:51:56,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-09-01 03:51:56,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 2303 flow. Second operand has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:56,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:51:56,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-09-01 03:51:56,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:58,525 INFO L130 PetriNetUnfolder]: 3357/6727 cut-off events. [2023-09-01 03:51:58,525 INFO L131 PetriNetUnfolder]: For 67409/67451 co-relation queries the response was YES. [2023-09-01 03:51:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48026 conditions, 6727 events. 3357/6727 cut-off events. For 67409/67451 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 48539 event pairs, 1307 based on Foata normal form. 54/6761 useless extension candidates. Maximal degree in co-relation 47949. Up to 6502 conditions per place. [2023-09-01 03:51:58,588 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 105 selfloop transitions, 8 changer transitions 22/138 dead transitions. [2023-09-01 03:51:58,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 138 transitions, 2090 flow [2023-09-01 03:51:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:51:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:51:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1005 transitions. [2023-09-01 03:51:58,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837342497136312 [2023-09-01 03:51:58,591 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1005 transitions. [2023-09-01 03:51:58,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1005 transitions. [2023-09-01 03:51:58,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:58,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1005 transitions. [2023-09-01 03:51:58,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.66666666666667) internal successors, (1005), 9 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:58,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:58,594 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:58,594 INFO L175 Difference]: Start difference. First operand has 169 places, 157 transitions, 2303 flow. Second operand 9 states and 1005 transitions. [2023-09-01 03:51:58,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 138 transitions, 2090 flow [2023-09-01 03:51:59,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 138 transitions, 1991 flow, removed 29 selfloop flow, removed 11 redundant places. [2023-09-01 03:51:59,137 INFO L231 Difference]: Finished difference. Result has 156 places, 105 transitions, 1364 flow [2023-09-01 03:51:59,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1364, PETRI_PLACES=156, PETRI_TRANSITIONS=105} [2023-09-01 03:51:59,138 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-09-01 03:51:59,138 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 105 transitions, 1364 flow [2023-09-01 03:51:59,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:59,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:59,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:51:59,148 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 (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:51:59,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:51:59,344 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:51:59,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -983054859, now seen corresponding path program 10 times [2023-09-01 03:51:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892123834] [2023-09-01 03:51:59,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:51:59,345 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 03:51:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:59,346 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:51:59,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 03:51:59,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:51:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 03:51:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:59,626 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:51:59,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:00,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:01,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:01,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892123834] [2023-09-01 03:52:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892123834] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:01,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-09-01 03:52:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567392654] [2023-09-01 03:52:01,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:01,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:52:01,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:52:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:52:06,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 291 [2023-09-01 03:52:06,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 105 transitions, 1364 flow. Second operand has 18 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:06,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:06,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 291 [2023-09-01 03:52:06,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:09,705 INFO L130 PetriNetUnfolder]: 3318/6664 cut-off events. [2023-09-01 03:52:09,706 INFO L131 PetriNetUnfolder]: For 62157/62160 co-relation queries the response was YES. [2023-09-01 03:52:09,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45602 conditions, 6664 events. 3318/6664 cut-off events. For 62157/62160 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 48204 event pairs, 1292 based on Foata normal form. 11/6675 useless extension candidates. Maximal degree in co-relation 45529. Up to 6502 conditions per place. [2023-09-01 03:52:09,764 INFO L137 encePairwiseOnDemand]: 283/291 looper letters, 91 selfloop transitions, 5 changer transitions 24/122 dead transitions. [2023-09-01 03:52:09,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 122 transitions, 1643 flow [2023-09-01 03:52:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:52:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:52:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1177 transitions. [2023-09-01 03:52:09,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36769759450171824 [2023-09-01 03:52:09,766 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1177 transitions. [2023-09-01 03:52:09,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1177 transitions. [2023-09-01 03:52:09,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:09,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1177 transitions. [2023-09-01 03:52:09,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:09,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:09,770 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:09,770 INFO L175 Difference]: Start difference. First operand has 156 places, 105 transitions, 1364 flow. Second operand 11 states and 1177 transitions. [2023-09-01 03:52:09,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 122 transitions, 1643 flow [2023-09-01 03:52:10,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 122 transitions, 1604 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-09-01 03:52:10,212 INFO L231 Difference]: Finished difference. Result has 152 places, 98 transitions, 1249 flow [2023-09-01 03:52:10,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1249, PETRI_PLACES=152, PETRI_TRANSITIONS=98} [2023-09-01 03:52:10,213 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2023-09-01 03:52:10,213 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 98 transitions, 1249 flow [2023-09-01 03:52:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:10,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:10,222 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 (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:10,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:10,417 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:10,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 475494560, now seen corresponding path program 11 times [2023-09-01 03:52:10,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709502550] [2023-09-01 03:52:10,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:52:10,418 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 03:52:10,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:10,419 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:10,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 03:52:10,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:52:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:52:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:52:10,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:10,784 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:52:10,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-09-01 03:52:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 03:52:10,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709502550] [2023-09-01 03:52:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709502550] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:10,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:10,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 03:52:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128739150] [2023-09-01 03:52:10,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:52:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:52:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:52:11,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-09-01 03:52:11,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 98 transitions, 1249 flow. Second operand has 8 states, 8 states have (on average 116.75) internal successors, (934), 8 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:11,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:11,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-09-01 03:52:11,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:12,724 INFO L130 PetriNetUnfolder]: 2890/5764 cut-off events. [2023-09-01 03:52:12,724 INFO L131 PetriNetUnfolder]: For 59192/59192 co-relation queries the response was YES. [2023-09-01 03:52:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38699 conditions, 5764 events. 2890/5764 cut-off events. For 59192/59192 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 40861 event pairs, 418 based on Foata normal form. 304/6068 useless extension candidates. Maximal degree in co-relation 38630. Up to 3535 conditions per place. [2023-09-01 03:52:12,769 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 81 selfloop transitions, 30 changer transitions 0/113 dead transitions. [2023-09-01 03:52:12,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 113 transitions, 1487 flow [2023-09-01 03:52:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:52:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:52:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 725 transitions. [2023-09-01 03:52:12,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152348224513173 [2023-09-01 03:52:12,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 725 transitions. [2023-09-01 03:52:12,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 725 transitions. [2023-09-01 03:52:12,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:12,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 725 transitions. [2023-09-01 03:52:12,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.83333333333333) internal successors, (725), 6 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:12,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:12,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:12,773 INFO L175 Difference]: Start difference. First operand has 152 places, 98 transitions, 1249 flow. Second operand 6 states and 725 transitions. [2023-09-01 03:52:12,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 113 transitions, 1487 flow [2023-09-01 03:52:13,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 113 transitions, 1464 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-09-01 03:52:13,110 INFO L231 Difference]: Finished difference. Result has 136 places, 92 transitions, 1191 flow [2023-09-01 03:52:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=136, PETRI_TRANSITIONS=92} [2023-09-01 03:52:13,111 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2023-09-01 03:52:13,111 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 92 transitions, 1191 flow [2023-09-01 03:52:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.75) internal successors, (934), 8 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:13,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:13,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:13,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:13,312 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:13,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1374710616, now seen corresponding path program 12 times [2023-09-01 03:52:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:13,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014358949] [2023-09-01 03:52:13,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:52:13,313 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 03:52:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:13,314 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:13,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 03:52:13,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:52:13,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 03:52:13,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:13,625 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:13,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:13,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-09-01 03:52:13,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 03:52:13,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:52:14,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-09-01 03:52:14,809 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 03:52:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:16,465 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:52:16,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 485 treesize of output 425 [2023-09-01 03:52:16,653 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:52:16,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 213 treesize of output 205 [2023-09-01 03:52:16,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:52:16,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 70 [2023-09-01 03:52:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:18,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014358949] [2023-09-01 03:52:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014358949] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:18,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-09-01 03:52:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304971939] [2023-09-01 03:52:18,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:18,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 03:52:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 03:52:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-09-01 03:52:23,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 291 [2023-09-01 03:52:23,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 92 transitions, 1191 flow. Second operand has 22 states, 22 states have (on average 87.5) internal successors, (1925), 22 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:23,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 291 [2023-09-01 03:52:23,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:26,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:52:34,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:52:40,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:52:48,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:52:52,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:53:00,858 INFO L130 PetriNetUnfolder]: 3237/6375 cut-off events. [2023-09-01 03:53:00,859 INFO L131 PetriNetUnfolder]: For 66057/66057 co-relation queries the response was YES. [2023-09-01 03:53:00,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44051 conditions, 6375 events. 3237/6375 cut-off events. For 66057/66057 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 45204 event pairs, 1017 based on Foata normal form. 120/6495 useless extension candidates. Maximal degree in co-relation 43987. Up to 5430 conditions per place. [2023-09-01 03:53:00,910 INFO L137 encePairwiseOnDemand]: 282/291 looper letters, 160 selfloop transitions, 127 changer transitions 6/295 dead transitions. [2023-09-01 03:53:00,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 295 transitions, 4053 flow [2023-09-01 03:53:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 03:53:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 03:53:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3196 transitions. [2023-09-01 03:53:00,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31379479626902307 [2023-09-01 03:53:00,916 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3196 transitions. [2023-09-01 03:53:00,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3196 transitions. [2023-09-01 03:53:00,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:00,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3196 transitions. [2023-09-01 03:53:00,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 91.31428571428572) internal successors, (3196), 35 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:00,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 291.0) internal successors, (10476), 36 states have internal predecessors, (10476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:00,928 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 291.0) internal successors, (10476), 36 states have internal predecessors, (10476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:00,928 INFO L175 Difference]: Start difference. First operand has 136 places, 92 transitions, 1191 flow. Second operand 35 states and 3196 transitions. [2023-09-01 03:53:00,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 295 transitions, 4053 flow [2023-09-01 03:53:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 295 transitions, 3949 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 03:53:01,357 INFO L231 Difference]: Finished difference. Result has 181 places, 217 transitions, 3614 flow [2023-09-01 03:53:01,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3614, PETRI_PLACES=181, PETRI_TRANSITIONS=217} [2023-09-01 03:53:01,357 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2023-09-01 03:53:01,358 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 217 transitions, 3614 flow [2023-09-01 03:53:01,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.5) internal successors, (1925), 22 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:01,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:01,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:01,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-09-01 03:53:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:01,561 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:01,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 188286678, now seen corresponding path program 13 times [2023-09-01 03:53:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046259290] [2023-09-01 03:53:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:53:01,562 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 03:53:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:01,563 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:53:01,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 03:53:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:53:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:53:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:02,192 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 03:53:02,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:03,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:03,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046259290] [2023-09-01 03:53:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046259290] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:53:03,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:53:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 03:53:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307499834] [2023-09-01 03:53:03,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:53:03,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:53:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:53:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:53:05,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 291 [2023-09-01 03:53:05,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 217 transitions, 3614 flow. Second operand has 20 states, 20 states have (on average 111.7) internal successors, (2234), 20 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:05,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:53:05,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 291 [2023-09-01 03:53:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:10,366 INFO L130 PetriNetUnfolder]: 5030/9896 cut-off events. [2023-09-01 03:53:10,366 INFO L131 PetriNetUnfolder]: For 129398/129398 co-relation queries the response was YES. [2023-09-01 03:53:10,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75364 conditions, 9896 events. 5030/9896 cut-off events. For 129398/129398 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 76173 event pairs, 341 based on Foata normal form. 414/10310 useless extension candidates. Maximal degree in co-relation 75286. Up to 4055 conditions per place. [2023-09-01 03:53:10,462 INFO L137 encePairwiseOnDemand]: 284/291 looper letters, 203 selfloop transitions, 194 changer transitions 26/425 dead transitions. [2023-09-01 03:53:10,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 425 transitions, 7404 flow [2023-09-01 03:53:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:53:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:53:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2224 transitions. [2023-09-01 03:53:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022427202025683 [2023-09-01 03:53:10,467 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2224 transitions. [2023-09-01 03:53:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2224 transitions. [2023-09-01 03:53:10,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:10,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2224 transitions. [2023-09-01 03:53:10,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 117.05263157894737) internal successors, (2224), 19 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:10,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 291.0) internal successors, (5820), 20 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:10,475 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 291.0) internal successors, (5820), 20 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:10,475 INFO L175 Difference]: Start difference. First operand has 181 places, 217 transitions, 3614 flow. Second operand 19 states and 2224 transitions. [2023-09-01 03:53:10,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 425 transitions, 7404 flow [2023-09-01 03:53:11,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 425 transitions, 6044 flow, removed 613 selfloop flow, removed 7 redundant places. [2023-09-01 03:53:11,575 INFO L231 Difference]: Finished difference. Result has 197 places, 320 transitions, 5144 flow [2023-09-01 03:53:11,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5144, PETRI_PLACES=197, PETRI_TRANSITIONS=320} [2023-09-01 03:53:11,576 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 159 predicate places. [2023-09-01 03:53:11,576 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 320 transitions, 5144 flow [2023-09-01 03:53:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.7) internal successors, (2234), 20 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:11,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:11,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:11,585 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 (33)] Forceful destruction successful, exit code 0 [2023-09-01 03:53:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.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 03:53:11,778 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:11,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash -720292611, now seen corresponding path program 14 times [2023-09-01 03:53:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802650182] [2023-09-01 03:53:11,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:53:11,779 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 03:53:11,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:11,781 INFO L229 MonitoredProcess]: Starting monitored process 34 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 03:53:11,782 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 (34)] Waiting until timeout for monitored process [2023-09-01 03:53:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:53:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:53:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 03:53:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:12,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-09-01 03:53:12,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 03:53:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-09-01 03:53:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:53:12,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:14,733 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_926 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_926) c_~q~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q_front~0))) (or (not (= (concat (concat (concat (select .cse0 (bvadd (_ bv7 32) c_~q~0.offset .cse1)) (select .cse0 (bvadd (_ bv6 32) c_~q~0.offset .cse1))) (select .cse0 (bvadd c_~q~0.offset (_ bv5 32) .cse1))) (select .cse0 (bvadd (_ bv4 32) c_~q~0.offset .cse1))) (_ bv0 32))) (= (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) c_~q~0.offset .cse1)) (select .cse0 (bvadd (_ bv2 32) c_~q~0.offset .cse1))) (select .cse0 (bvadd (_ bv1 32) c_~q~0.offset .cse1))) (select .cse0 (bvadd c_~q~0.offset .cse1))) (_ bv0 32))))) is different from false [2023-09-01 03:53:20,103 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2023-09-01 03:53:20,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 950 treesize of output 945 [2023-09-01 03:53:20,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,129 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,142 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,147 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,148 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,164 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,164 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,171 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,173 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,173 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,209 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,209 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 03:53:20,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:53:20,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 104 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 16 case distinctions, treesize of input 330 treesize of output 428 [2023-09-01 03:53:20,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:53:20,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 213 treesize of output 103 [2023-09-01 03:55:24,345 WARN L222 SmtUtils]: Spent 12.42s on a formula simplification. DAG size of input: 2477 DAG size of output: 2934 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 03:56:54,385 WARN L222 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 1946 DAG size of output: 2190 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 03:57:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:57:41,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:57:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802650182] [2023-09-01 03:57:41,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802650182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:57:41,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:57:41,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 03:57:41,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650485059] [2023-09-01 03:57:41,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:57:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:57:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:57:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:57:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=4, NotChecked=22, Total=182 [2023-09-01 03:57:41,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 291 [2023-09-01 03:57:41,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 320 transitions, 5144 flow. Second operand has 14 states, 14 states have (on average 97.85714285714286) internal successors, (1370), 14 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:57:41,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:57:41,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 291 [2023-09-01 03:57:41,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:57:44,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:57:46,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:02,524 WARN L222 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 89 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:58:04,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:06,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:08,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:10,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:13,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:15,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:17,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:19,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:58:21,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:23,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:58:25,914 INFO L130 PetriNetUnfolder]: 5238/9980 cut-off events. [2023-09-01 03:58:25,914 INFO L131 PetriNetUnfolder]: For 153598/153598 co-relation queries the response was YES. [2023-09-01 03:58:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83976 conditions, 9980 events. 5238/9980 cut-off events. For 153598/153598 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 73657 event pairs, 392 based on Foata normal form. 324/10304 useless extension candidates. Maximal degree in co-relation 83891. Up to 5273 conditions per place. [2023-09-01 03:58:26,206 INFO L137 encePairwiseOnDemand]: 286/291 looper letters, 231 selfloop transitions, 125 changer transitions 0/358 dead transitions. [2023-09-01 03:58:26,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 358 transitions, 6336 flow [2023-09-01 03:58:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:58:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:58:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 716 transitions. [2023-09-01 03:58:26,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35149729995090817 [2023-09-01 03:58:26,209 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 716 transitions. [2023-09-01 03:58:26,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 716 transitions. [2023-09-01 03:58:26,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:58:26,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 716 transitions. [2023-09-01 03:58:26,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 102.28571428571429) internal successors, (716), 7 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:26,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:26,211 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:26,211 INFO L175 Difference]: Start difference. First operand has 197 places, 320 transitions, 5144 flow. Second operand 7 states and 716 transitions. [2023-09-01 03:58:26,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 358 transitions, 6336 flow [2023-09-01 03:58:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 358 transitions, 5666 flow, removed 229 selfloop flow, removed 14 redundant places. [2023-09-01 03:58:28,055 INFO L231 Difference]: Finished difference. Result has 187 places, 330 transitions, 5085 flow [2023-09-01 03:58:28,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5085, PETRI_PLACES=187, PETRI_TRANSITIONS=330} [2023-09-01 03:58:28,056 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 149 predicate places. [2023-09-01 03:58:28,056 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 330 transitions, 5085 flow [2023-09-01 03:58:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.85714285714286) internal successors, (1370), 14 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:58:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:58:28,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:58:28,066 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 (34)] Forceful destruction successful, exit code 0 [2023-09-01 03:58:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.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 03:58:28,257 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:58:28,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:58:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 835049529, now seen corresponding path program 15 times [2023-09-01 03:58:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:58:28,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729106368] [2023-09-01 03:58:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:58:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:58:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:58:28,259 INFO L229 MonitoredProcess]: Starting monitored process 35 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 03:58:28,261 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 (35)] Waiting until timeout for monitored process [2023-09-01 03:58:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:58:28,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:58:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 03:58:28,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:58:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 03:58:29,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:58:32,835 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2023-09-01 03:58:32,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 181 treesize of output 247 Killed by 15